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1392 lines
58 KiB
Text
1392 lines
58 KiB
Text
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GSTREAMER 1.16 RELEASE NOTES
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GStreamer 1.16.0 was originally released on 19 April 2019.
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See https://gstreamer.freedesktop.org/releases/1.16/ for the latest
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version of this document.
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_Last updated: Friday 19 April 2019, 00:00 UTC (log)_
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Introduction
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The GStreamer team is proud to announce a new major feature release in
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the stable 1.x API series of your favourite cross-platform multimedia
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framework!
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As always, this release is again packed with many new features, bug
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fixes and other improvements.
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Highlights
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- GStreamer WebRTC stack gained support for data channels for
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peer-to-peer communication based on SCTP, BUNDLE support, as well as
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support for multiple TURN servers.
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- AV1 video codec support for Matroska and QuickTime/MP4 containers
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and more configuration options and supported input formats for the
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AOMedia AV1 encoder
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- Support for Closed Captions and other Ancillary Data in video
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- Support for planar (non-interleaved) raw audio
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- GstVideoAggregator, compositor and OpenGL mixer elements are now in
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-base
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- New alternate fields interlace mode where each buffer carries a
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single field
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- WebM and Matroska ContentEncryption support in the Matroska demuxer
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- new WebKit WPE-based web browser source element
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- Video4Linux: HEVC encoding and decoding, JPEG encoding, and improved
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dmabuf import/export
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- Hardware-accelerated Nvidia video decoder gained support for VP8/VP9
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decoding, whilst the encoder gained support for H.265/HEVC encoding.
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- Many improvements to the Intel Media SDK based hardware-accelerated
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video decoder and encoder plugin (msdk): dmabuf import/export for
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zero-copy integration with other components; VP9 decoding; 10-bit
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HEVC encoding; video post-processing (vpp) support including
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deinterlacing; and the video decoder now handles dynamic resolution
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changes.
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- The ASS/SSA subtitle overlay renderer can now handle multiple
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subtitles that overlap in time and will show them on screen
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simultaneously
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- The Meson build is now feature-complete (*) and it is now the
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recommended build system on all platforms. The Autotools build is
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scheduled to be removed in the next cycle.
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- The GStreamer Rust bindings and Rust plugins module are now
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officially part of upstream GStreamer.
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- The GStreamer Editing Services gained a gesdemux element that allows
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directly playing back serialized edit list with playbin or
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(uri)decodebin
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- Many performance improvements
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Major new features and changes
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Noteworthy new API
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- GstAggregator has a new "min-upstream-latency" property that forces
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a minimum aggregate latency for the input branches of an aggregator.
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This is useful for dynamic pipelines where branches with a higher
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latency might be added later after the pipeline is already up and
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running and where a change in the latency would be disruptive. This
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only applies to the case where at least one of the input branches is
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live though, it won’t force the aggregator into live mode in the
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absence of any live inputs.
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- GstBaseSink gained a "processing-deadline" property and
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setter/getter API to configure a processing deadline for live
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pipelines. The processing deadline is the acceptable amount of time
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to process the media in a live pipeline before it reaches the sink.
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This is on top of the systemic latency that is normally reported by
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the latency query. This defaults to 20ms and should make pipelines
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such as v4l2src ! xvimagesink not claim that all frames are late in
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the QoS events. Ideally, this should replace the "max-lateness"
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property for most applications.
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- RTCP Extended Reports (XR) parsing according to RFC 3611:
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Loss/Duplicate RLE, Packet Receipt Times, Receiver Reference Time,
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Delay since the last Receiver (DLRR), Statistics Summary, and VoIP
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Metrics reports. This only provides the ability to parse such
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packets, generation of XR packets is not supported yet and XR
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packets are not automatically parsed by rtpbin / rtpsession but must
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be actively handled by the application.
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- a new mode for interlaced video was added where each buffer carries
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a single field of interlaced video, with buffer flags indicating
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whether the field is the top field or bottom field. Top and bottom
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fields are expected to alternate in this mode. Caps for this
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interlace mode must also carry a format:Interlaced caps feature to
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ensure backwards compatibility.
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- The video library has gained support for three new raw pixel
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formats:
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- Y410: packed 4:4:4 YUV, 10 bits per channel
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- Y210: packed 4:2:2 YUV, 10 bits per channel
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- NV12_10LE40: fully-packed 10-bit variant of NV12_10LE32,
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i.e. without the padding bits
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- GstRTPSourceMeta is a new meta that can be used to transport
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information about the origin of depayloaded or decoded RTP buffers,
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e.g. when mixing audio from multiple sources into a single stream. A
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new "source-info" property on the RTP depayloader base class
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determines whether depayloaders should put this meta on outgoing
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buffers. Similarly, the same property on RTP payloaders determines
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whether they should use the information from this meta to construct
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the CSRCs list on outgoing RTP buffers.
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- gst_sdp_message_from_text() is a convenience constructor to parse
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SDPs from a string which is particularly useful for language
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bindings.
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Support for Planar (Non-Interleaved) Raw Audio
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Raw audio samples are usually passed around in interleaved form in
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GStreamer, which means that if there are multiple audio channels the
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samples for each channel are interleaved in memory, e.g.
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|LEFT|RIGHT|LEFT|RIGHT|LEFT|RIGHT| for stereo audio. A non-interleaved
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or planar arrangement in memory would look like
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|LEFT|LEFT|LEFT|RIGHT|RIGHT|RIGHT| instead, possibly with
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|LEFT|LEFT|LEFT| and |RIGHT|RIGHT|RIGHT| residing in separate memory
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chunks or separated by some padding.
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GStreamer has always had signalling for non-interleaved audio since
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version 1.0, but it was never actually properly implemented in any
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elements. audioconvert would advertise support for it, but wasn’t
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actually able to handle it correctly.
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With this release we now have full support for non-interleaved audio as
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well, which means more efficient integration with external APIs that
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handle audio this way, but also more efficient processing of certain
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operations like interleaving multiple 1-channel streams into a
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multi-channel stream which can be done without memory copies now.
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New API to support this has been added to the GStreamer Audio support
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library: There is now a new GstAudioMeta which describes how data is
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laid out inside the buffer, and buffers with non-interleaved audio must
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always carry this meta. To access the non-interleaved audio samples you
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must map such buffers with gst_audio_buffer_map() which works much like
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gst_buffer_map() or gst_video_frame_map() in that it will populate a
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little GstAudioBuffer helper structure passed to it with the number of
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samples, the number of planes and pointers to the start of each plane in
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memory. This function can also be used to map interleaved audio buffers
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in which case there will be only one plane of interleaved samples.
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Of course support for this has also been implemented in the various
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audio helper and conversion APIs, base classes, and in elements such as
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audioconvert, audioresample, audiotestsrc, audiorate.
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Support for Closed Captions and Other Ancillary Data in Video
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The video support library has gained support for detecting and
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extracting Ancillary Data from videos as per the SMPTE S291M
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specification, including:
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- a VBI (Vertical Blanking Interval) parser that can detect and
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extract Ancillary Data from Vertical Blanking Interval lines of
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component signals. This is currently supported for videos in v210
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and UYVY format.
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- a new GstMeta for closed captions: GstVideoCaptionMeta. This
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supports the two types of closed captions, CEA-608 and CEA-708,
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along with the four different ways they can be transported (other
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systems are a superset of those).
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- a VBI (Vertical Blanking Interval) encoder for writing ancillary
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data to the Vertical Blanking Interval lines of component signals.
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The new closedcaption plugin in gst-plugins-bad then makes use of all
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this new infrastructure and provides the following elements:
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- cccombiner: a closed caption combiner that takes a closed captions
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stream and another stream and adds the closed captions as
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GstVideoCaptionMeta to the buffers of the other stream.
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- ccextractor: a closed caption extractor which will take
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GstVideoCaptionMeta from input buffers and output them as a separate
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closed captions stream.
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- ccconverter: a closed caption converter that can convert between
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different formats
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- line21encoder, line21decoder: inject/extract line21 closed captions
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to/from SD video streams
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- cc708overlay: decodes CEA 608/708 captions and overlays them on
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video
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Additionally, the following elements have also gained Closed Caption
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support:
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- qtdemux and qtmux support CEA 608/708 Closed Caption tracks
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- mpegvideoparse, h264parse extracts Closed Captions from MPEG-2/H.264
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video streams
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- avviddec, avvidenc, x264enc got support for extracting/injecting
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Closed Captions
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- decklinkvideosink can output closed captions and decklinkvideosrc
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can extract closed captions
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- playbin and playbin3 learned how to autoplug CEA 608/708 CC overlay
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elements
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- the externally maintained ajavideosrc element for AJA capture cards
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has support for extracting closed captions
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The rsclosedcaption plugin in the Rust plugins collection includes a
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MacCaption (MCC) file parser and encoder.
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New Elements
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- overlaycomposition: New element that allows applications to draw
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GstVideoOverlayCompositions on a stream. The element will emit the
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"draw" signal for each video buffer, and the application then
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generates an overlay for that frame (or not). This is much more
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performant than e.g. cairooverlay for many use cases, e.g. because
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pixel format conversions can be avoided or the blitting of the
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overlay can be delegated to downstream elements (such as
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gloverlaycompositor). It’s particularly useful for cases where only
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a small section of the video frame should be drawn on.
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- gloverlaycompositor: New OpenGL-based compositor element that
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flattens any overlays from GstVideoOverlayCompositionMetas into the
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video stream. This element is also always part of glimagesink.
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- glalpha: New element that adds an alpha channel to a video stream.
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The values of the alpha channel can either be set to a constant or
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can be dynamically calculated via chroma keying. It is similar to
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the existing alpha element but based on OpenGL. Calculations are
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done in floating point so results may not be identical to the output
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of the existing alpha element.
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- rtpfunnel funnels together RTP streams into a single session. Use
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cases include multiplexing and bundle. webrtcbin uses it to
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implement BUNDLE support.
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- testsrcbin is a source element that provides an audio and/or video
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stream and also announces them using the recently-introduced
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GstStream API. This is useful for testing elements such as playbin3
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or uridecodebin3 etc.
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- New closed caption elements: cccombiner, ccextractor, ccconverter,
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line21encoder, line21decoder and cc708overlay (see above)
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- wpesrc: new source element acting as a Web Browser based on WebKit
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WPE
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- Two new OpenCV-based elements: cameracalibrate and cameraundistort
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that can communicate to figure out distortion correction parameters
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for a camera and correct for the distortion.
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- New sctp plugin based on usrsctp with sctpenc and sctpdec elements.
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These elements are used inside webrtcbin for implementing data
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channels.
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New element features and additions
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- playbin3, playbin and playsink have gained a new "text-offset"
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property to adjust the positioning of the selected subtitle stream
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vis-a-vis the audio and video streams. This uses subtitleoverlay’s
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new "subtitle-ts-offset" property. GstPlayer has gained matching API
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for this, namely gst_player_get_text_video_offset().
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- playbin3 buffering improvements: in network playback scenarios there
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may be multiple inputs to decodebin3, and buffering will be done
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before decodebin3 using queue2 or downloadbuffer elements inside
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urisourcebin. Since this is before any parsers or demuxers there may
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not be any bitrate information available for the various streams, so
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it was difficult to configure the buffering there smartly within
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global constraints. This was improved now: The queue2 elements
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inside urisourcebin will now use the new bitrate query to figure out
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a bitrate estimate for the stream if no bitrate was provided by
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upstream, and urisourcebin will use the bitrates of the individual
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queues to distribute the globally-set "buffer-size" budget in bytes
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to the various queues. urisourcebin also gained "low-watermark" and
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"high-watermark" properties which will be proxied to the internal
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queues, as well as a read-only "statistics" property which allows
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querying of the minimum/maximum/average byte and time levels of the
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queues inside the urisourcebin in question.
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- splitmuxsink has gained a couple of new features:
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- new "async-finalize" mode: This mode is useful for muxers or
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outputs that can take a long time to finalize a file. Instead of
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blocking the whole upstream pipeline while the muxer is doing
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its stuff, we can unlink it and spawn a new muxer + sink
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combination to continue running normally. This requires us to
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receive the muxer and sink (if needed) as factories via the new
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"muxer-factory" and "sink-factory" properties, optionally
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accompanied by their respective properties structures (set via
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the new "muxer-properties" and "sink-properties" properties).
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There are also new "muxer-added" and "sink-added" signals in
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case custom code has to be called for them to configure them.
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- "split-at-running-time" action signal: When called by the user,
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this action signal ends the current file (and starts a new one)
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as soon as the given running time is reached. If called multiple
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times, running times are queued up and processed in the order
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they were given.
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- "split-after" action signal to finish outputting the current GOP
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to the current file and then start a new file as soon as the GOP
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is finished and a new GOP is opened (unlike the existing
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"split-now" which immediately finishes the current file and
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writes the current GOP into the next newly-started file).
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- "reset-muxer" property: when unset, the muxer is reset using
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flush events instead of setting its state to NULL and back. This
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means the muxer can keep state across resets, e.g. mpegtsmux
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will keep the continuity counter continuous across segments as
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required by hlssink2.
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- qtdemux gained PIFF track encryption box support in addition to the
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already-existing PIFF sample encryption support, and also allows
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applications to select which encryption system to use via a
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"drm-preferred-decryption-system-id" context in case there are
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multiple options.
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- qtmux: the "start-gap-threshold" property determines now whether an
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edit list will be created to account for small gaps or offsets at
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the beginning of a stream in case the start timestamps of tracks
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don’t line up perfectly. Previously the threshold was hard-coded to
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1% of the (video) frame duration, now it is 0 by default (so edit
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list will be created even for small differences), but fully
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configurable.
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- rtpjitterbuffer has improved end-of-stream handling
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- rtpmp4vpay will be prefered over rtpmp4gpay for MPEG-4 video in
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autoplugging scenarios now
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- rtspsrc now allows applications to send RTSP SET_PARAMETER and
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GET_PARAMETER requests using action signals.
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- rtspsrc has a small (100ms) configurable teardown delay by default
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to try and make sure an RTSP TEARDOWN request gets sent out when the
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source element shuts down. This will block the downward PAUSED to
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READY state change for a short time, but can be disabled where it’s
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a problem. Some servers only allow a limited number of concurrent
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clients, so if no proper TEARDOWN is sent new clients may have
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problems connecting to the server for a while.
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- souphttpsrc behaves better with low bitrate streams now. Before it
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would increase the read block size too quickly which could lead to
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it not reading any data from the socket for a very long time with
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low bitrate streams that are output live downstream. This could lead
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to servers kicking off the client.
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- filesink: do internal buffering to avoid performance regression with
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small writes since we bypass libc buffering by using writev()
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instead of fwrite()
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- identity: add "eos-after" property and fix "error-after" property
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when the element is reused
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- input-selector: lets context queries pass through, so that
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e.g. upstream OpenGL elements can use contexts and displays
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advertised by downstream elements
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- queue2: avoid ping-pong between 0% and 100% buffering messages if
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upstream is pushing buffers larger than one of its limits, plus
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performance optimisations
|
||
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- opusdec: new "phase-inversion" property to control phase inversion.
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When enabled, this will slightly increase stereo quality, but
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produces a stream that when downmixed to mono will suffer audio
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distortions.
|
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- The x265enc HEVC encoder also exposes a "key-int-max" property to
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configure the maximum allowed GOP size now.
|
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- decklinkvideosink has seen stability improvements for long-running
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||
pipelines (potential crash due to overflow of leaked clock refcount)
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and clock-slaving improvements when performing flushing seeks
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||
(causing stalls in the output timeline), pausing and/or buffering.
|
||
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- srtpdec, srtpenc: add support for MKIs which allow multiple keys to
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||
be used with a single SRTP stream
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||
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- srtpdec, srtpenc: add support for AES-GCM and also add support for
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it in gst-rtsp-server and rtspsrc.
|
||
|
||
- The srt Secure Reliable Transport plugin has integrated server and
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||
client elements srt{client,server}{src,sink} into one (srtsrc and
|
||
srtsink), since SRT connection mode can be changed by uri
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parameters.
|
||
|
||
- h264parse and h265parse will handle SEI recovery point messages and
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mark recovery points as keyframes as well (in addition to IDR
|
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frames)
|
||
|
||
- webrtcbin: "add-turn-server" action signal to pass multiple ICE
|
||
relays (TURN servers).
|
||
|
||
- The removesilence element has received various new features and
|
||
properties, such as a "threshold" property, detecting silence only
|
||
after minimum silence time/buffers, a "silent" property to control
|
||
bus message notifications as well as a "squash" property.
|
||
|
||
- AOMedia AV1 decoder gained support for 10/12bit decoding whilst the
|
||
AV1 encoder supports more image formats and subsamplings now and
|
||
acquired support for rate control and profile related configuration.
|
||
|
||
- The Fraunhofer fdkaac plugin can now be built against the 2.0.0
|
||
version API and has improved multichannel support
|
||
|
||
- kmssink now supports unpadded 24-bit RGB and can configure mode
|
||
setting from video info, which enables display of multi-planar
|
||
formats such as I420 or NV12 with modesetting. It has also gained a
|
||
number of new properties: The "restore-crtc" property does what it
|
||
says on the tin and is enabled by default. "plane-properties" and
|
||
"connector-properties" can be used to pass custom properties to the
|
||
DRM.
|
||
|
||
- waylandsink has a "fullscreen" property now and supports the
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||
XDG-Shell protocol.
|
||
|
||
- decklinkvideosink, decklinkvideosrc support selecting between
|
||
half/full duplex
|
||
|
||
- The vulkan plugin gained support for macOS and iOS via MoltenVK in
|
||
addition to the existing support for X11 and Wayland
|
||
|
||
- imagefreeze has a new num-buffers property to limit the number of
|
||
buffers that are produced and to send an EOS event afterwards
|
||
|
||
- webrtcbin has a new, introspectable get-transceiver signal in
|
||
addition to the old get-transceivers signal that couldn’t be used
|
||
from bindings
|
||
|
||
- Support for per-element latency information was added to the latency
|
||
tracer
|
||
|
||
Plugin and library moves
|
||
|
||
- The stereo element was moved from -bad into the existing audiofx
|
||
plugin in -good. If you get duplicate type registration warnings
|
||
when upgrading, check that you don’t have a stale stereoplugin lying
|
||
about somewhere.
|
||
|
||
GstVideoAggregator, compositor, and OpenGL mixer elements moved from -bad to -base
|
||
|
||
GstVideoAggregator is a new base class for raw video mixers and muxers
|
||
and is based on GstAggregator. It provides defined-latency mixing of raw
|
||
video inputs and ensures that the pipeline won’t stall even if one of
|
||
the input streams stops producing data.
|
||
|
||
As part of the move to stabilise the API there were some last-minute API
|
||
changes and clean-ups, but those should mostly affect internal elements.
|
||
Most notably, the "ignore-eos" pad property was renamed to
|
||
"repeat-after-eos" and the conversion code was moved to a
|
||
GstVideoAggregatorConvertPad subclass to avoid code duplication, make
|
||
things less awkward for subclasses like the OpenGL-based video mixer,
|
||
and make the API more consistent with the audio aggregator API.
|
||
|
||
It is used by the compositor element, which is a replacement for
|
||
‘videomixer’ which did not handle live inputs very well. compositor
|
||
should behave much better in that respect and generally behave as one
|
||
would expected in most scenarios.
|
||
|
||
The compositor element has gained support for per-pad blending mode
|
||
operators (SOURCE, OVER, ADD) which determines what operator to use for
|
||
blending this pad over the previous ones. This can be used to implement
|
||
crossfading and the available operators can be extended in the future as
|
||
needed.
|
||
|
||
A number of OpenGL-based video mixer elements (glvideomixer, glmixerbin,
|
||
glvideomixerelement, glstereomix, glmosaic) which are built on top of
|
||
GstVideoAggregator have also been moved from -bad to -base now. These
|
||
elements have been merged into the existing OpenGL plugin, so if you get
|
||
duplicate type registration warnings when upgrading, check that you
|
||
don’t have a stale openglmixers plugin lying about somewhere.
|
||
|
||
Plugin removals
|
||
|
||
The following plugins have been removed from gst-plugins-bad:
|
||
|
||
- The experimental daala plugin has been removed, since it’s not so
|
||
useful now that all effort is focused on AV1 instead, and it had to
|
||
be enabled explicitly with --enable-experimental anyway.
|
||
|
||
- The spc plugin has been removed. It has been replaced by the gme
|
||
plugin.
|
||
|
||
- The acmmp3dec and acmenc plugins for Windows have been removed. ACM
|
||
is an ancient legacy API and there was no point in keeping the
|
||
plugins around for a licensed MP3 decoder now that the MP3 patents
|
||
have expired and we have a decoder in -good. We also didn’t ship
|
||
these in our cerbero-built Windows packages, so it’s unlikely that
|
||
they’ll be missed.
|
||
|
||
|
||
Miscellaneous API additions
|
||
|
||
- GstBitwriter: new generic bit writer API to complement the existing
|
||
bit reader
|
||
|
||
- gst_buffer_new_wrapped_bytes() creates a wrap buffer from a GBytes
|
||
|
||
- gst_caps_set_features_simple() sets a caps feature on all the
|
||
structures of a GstCaps
|
||
|
||
- New GST_QUERY_BITRATE query: This allows determining from downstream
|
||
what the expected bitrate of a stream may be which is useful in
|
||
queue2 for setting time based limits when upstream does not provide
|
||
timing information. tsdemux, qtdemux and matroskademux have basic
|
||
support for this query on their sink pads.
|
||
|
||
- elements: there is a new “Hardware” class specifier. Elements
|
||
interacting with hardware devices should specify this classifier in
|
||
their element factory class metadata. This is useful to advertise as
|
||
one might need to put such elements into READY state to test if the
|
||
hardware is present in the system for example.
|
||
|
||
- protection: Add a new definition for unspecified system protection,
|
||
GST_PROTECTION_UNSPECIFIED_SYSTEM_ID
|
||
|
||
- take functions for various mini objects that didn’t have them yet:
|
||
gst_query_take(), gst_message_take(), gst_tag_list_take(),
|
||
gst_buffer_list_take(). Unlike the various _replace() functions
|
||
_take() does not increase the reference count but takes ownership of
|
||
the mini object passed.
|
||
|
||
- clear functions for various mini object types and GstObject which
|
||
unrefs the object or mini object (if non-NULL) and sets the variable
|
||
pointed to to NULL: gst_clear_structure(), gst_clear_tag_list(),
|
||
gst_clear_query(), gst_clear_message(), gst_clear_event(),
|
||
gst_clear_caps(), gst_clear_buffer_list(), gst_clear_buffer(),
|
||
gst_clear_mini_object(), gst_clear_object()
|
||
|
||
- miniobject: new API gst_mini_object_add_parent() and
|
||
gst_mini_object_remove_parent() to set parent pointers on mini
|
||
objects to ensure correct writability: Every container of
|
||
miniobjects now needs to store itself as parent in the child object,
|
||
and remove itself again later. A mini object is then only writable
|
||
if there is at most one parent, that parent is writable itself, and
|
||
the reference count of the mini object is 1. GstBuffer (for
|
||
memories), GstBufferList (for buffers), GstSample (for caps, buffer,
|
||
bufferlist), and GstVideoOverlayComposition were updated
|
||
accordingly. Without this it was possible to have e.g. a buffer list
|
||
with a refcount of 2 used in two places at once that both modify the
|
||
same buffer with refcount 1 at the same time wrongly thinking it is
|
||
writable even though it’s really not.
|
||
|
||
- poll: add API to watch for POLLPRI and stop treating POLLPRI as a
|
||
read. This is useful to wait for video4linux events which are
|
||
signalled via POLLPRI.
|
||
|
||
- sample: new API to update the contents of a GstSample and make it
|
||
writable: gst_sample_set_buffer(), gst_sample_set_caps(),
|
||
gst_sample_set_segment(), gst_sample_set_info(), plus
|
||
gst_sample_is_writable() and gst_sample_make_writable(). This makes
|
||
it possible to reuse a sample object and avoid unnecessary memory
|
||
allocations, for example in appsink.
|
||
|
||
- ClockIDs now keep a weak reference to underlying clock to avoid
|
||
crashes in basesink in corner cases where a clock goes away while
|
||
the ClockID is still in use, plus some new API
|
||
(gst_clock_id_get_clock(), gst_clock_id_uses_clock()) to check the
|
||
clock a ClockID is linked to.
|
||
|
||
- The GstCheck unit test library gained a
|
||
fail_unless_equals_clocktime() convenience macro as well as some new
|
||
GstHarness API for for proposing meta APIs from the allocation
|
||
query: gst_harness_add_propose_allocation_meta(). ASSERT_CRITICAL()
|
||
checks in unit tests are now skipped if GStreamer was compiled with
|
||
GST_DISABLE_GLIB_CHECKS.
|
||
|
||
- gst_audio_buffer_truncate() convenience function to truncate a raw
|
||
audio buffer
|
||
|
||
- GstDiscoverer has support for caching the results of discovery in
|
||
the default cache directory. This can be enabled with the use-cache
|
||
property and is disabled by default.
|
||
|
||
- GstMeta that are attached to GstBuffers are now always stored in the
|
||
order in which they were added.
|
||
|
||
- Additional support for signalling ONVIF specific features were
|
||
added: the SEEK event can store a trickmode-interval now and support
|
||
for the Rate-Control and Frames RTSP headers was added to the RTSP
|
||
library.
|
||
|
||
|
||
Miscellaneous performance and memory optimisations
|
||
|
||
As always there have been many performance and memory usage improvements
|
||
across all components and modules. Some of them (such as dmabuf
|
||
import/export) have already been mentioned elsewhere so won’t be
|
||
repeated here.
|
||
|
||
The following list is only a small snapshot of some of the more
|
||
interesting optimisations that haven’t been mentioned in other contexts
|
||
yet:
|
||
|
||
- The GstVideoEncoder and GstVideoDecoder base classes now release the
|
||
STREAM_LOCK when pushing out buffers, which means (multi-threaded)
|
||
encoders and decoders can now receive and continue to process input
|
||
buffers whilst waiting for downstream elements in the pipeline to
|
||
process the buffer that was pushed out. This increases throughput
|
||
and reduces processing latency, also and especially for
|
||
hardware-accelerated encoder/decoder elements.
|
||
|
||
- GstQueueArray has seen a few API additions
|
||
(gst_queue_array_peek_nth(), gst_queue_array_set_clear_func(),
|
||
gst_queue_array_clear()) so that it can be used in other places like
|
||
GstAdapter instead of a GList, which reduces allocations and
|
||
improves performance.
|
||
|
||
- appsink now reuses the sample object in pull_sample() if possible
|
||
|
||
- rtpsession only starts the RTCP thread when it’s actually needed now
|
||
|
||
- udpsrc uses a buffer pool now and the GstUdpSrc object structure was
|
||
optimised for better cache performance
|
||
|
||
GstPlayer
|
||
|
||
- API was added to fine-tune the synchronisation offset between
|
||
subtitles and video
|
||
|
||
|
||
Miscellaneous changes
|
||
|
||
- As a result of moving to newer FFmpeg APIs, encoder and decoder
|
||
elements exposed by the GStreamer FFmpeg wrapper plugin (gst-libav)
|
||
may have seen possibly incompatible changes to property names and/or
|
||
types, and not all properties exposed might be functional. We are
|
||
still reviewing the new properties and aim to minimise breaking
|
||
changes at least for the most commonly-used properties, so please
|
||
report any issues you run into!
|
||
|
||
OpenGL integration
|
||
|
||
- The OpenGL mixer elements have been moved from -bad to
|
||
gst-plugins-base (see above)
|
||
|
||
- The Mesa GBM backend now supports headless mode
|
||
|
||
- gloverlaycompositor: New OpenGL-based compositor element that
|
||
flattens any overlays from GstVideoOverlayCompositionMetas into the
|
||
video stream.
|
||
|
||
- glalpha: New element that adds an alpha channel to a video stream.
|
||
The values of the alpha channel can either be set to a constant or
|
||
can be dynamically calculated via chroma keying. It is similar to
|
||
the existing alpha element but based on OpenGL. Calculations are
|
||
done in floating point so results may not be identical to the output
|
||
of the existing alpha element.
|
||
|
||
- glupload: Implement direct dmabuf uploader, the idea being that some
|
||
GPUs (like the Vivante series) can actually perform the YUV->RGB
|
||
conversion internally, so no custom conversion shaders are needed.
|
||
To make use of this feature, we need an additional uploader that can
|
||
import DMABUF FDs and also directly pass the pixel format, relying
|
||
on the GPU to do the conversion.
|
||
|
||
- The OpenGL library no longer restores the OpenGL viewport. This is a
|
||
performance optimization to not require performing multiple
|
||
expensive glGet*() function calls per frame. This affects any
|
||
application or plugin use of the following functions and objects:
|
||
- glcolorconvert library object (not the element)
|
||
- glviewconvert library object (not the element)
|
||
- gst_gl_framebuffer_draw_to_texture()
|
||
- custom GstGLWindow implementations
|
||
|
||
|
||
Tracing framework and debugging improvements
|
||
|
||
- There is now a GDB PRETTY PRINTER FOR VARIOUS GSTREAMER TYPES: For
|
||
GstObject pointers the type and name is added, e.g.
|
||
0x5555557e4110 [GstDecodeBin|decodebin0]. For GstMiniObject pointers
|
||
the object type is added, e.g. 0x7fffe001fc50 [GstBuffer]. For
|
||
GstClockTime and GstClockTimeDiff the time is also printed in human
|
||
readable form, e.g. 150116219955 [+0:02:30.116219955].
|
||
|
||
- GDB EXTENSION WITH TWO CUSTOM GDB COMMANDS gst-dot AND gst-print:
|
||
|
||
- gst-dot creates dot files that a very close to what
|
||
GST_DEBUG_BIN_TO_DOT_FILE() produces, but object properties and
|
||
buffer contents such as codec-data in caps are not available.
|
||
|
||
- gst-print produces high-level information about a GStreamer
|
||
object. This is currently limited to pads for GstElements and
|
||
events for the pads. The output may look like this:
|
||
|
||
- gst_structure_to_string() now serialises the actual value of
|
||
pointers when serialising GstStructures instead of claiming they’re
|
||
NULL. This makes debug logging in various places less confusing,
|
||
because it’s clear now that structure fields actually hold valid
|
||
objects. Such object pointer values will never be deserialised
|
||
however.
|
||
|
||
|
||
Tools
|
||
|
||
- gst-inspect-1.0 has coloured output now and will automatically use a
|
||
pager if the output does not fit on a page. This only works in a
|
||
UNIX environment and if the output is not piped, and on Windows 10
|
||
build 16257 or newer. If you don’t like the colours you can disable
|
||
them by setting the GST_INSPECT_NO_COLORS=1 environment variable or
|
||
passing the --no-color command line option.
|
||
|
||
|
||
GStreamer RTSP server
|
||
|
||
- Improved backlog handling when using TCP interleaved for data
|
||
transport. Before there was a fixed maximum size for backlog
|
||
messages, which was prone to deadlocks and made it difficult to
|
||
control memory usage with the watch backlog. The RTSP server now
|
||
limits queued TCP data messages to one per stream, moving queuing of
|
||
the data into the pipeline and leaving the RTSP connection
|
||
responsive to RTSP messages in both directions, preventing all those
|
||
problems.
|
||
|
||
- Initial ULP Forward Error Correction support in rtspclientsink and
|
||
for RECORD mode in the server.
|
||
|
||
- API to explicitly enable retransmission requests (RTX)
|
||
|
||
- Lots of multicast-related fixes
|
||
|
||
- rtsp-auth: Add support for parsing .htdigest files
|
||
|
||
|
||
GStreamer VAAPI
|
||
|
||
- Support Wayland’s display for context sharing, so the application
|
||
can pass its own wl_display in order to be used for the VAAPI
|
||
display creation.
|
||
|
||
- A lot of work to support new Intel hardware using media-driver as VA
|
||
backend.
|
||
|
||
- For non-x86 devices, VAAPI display can instantiate, through DRM,
|
||
with no PCI bus. This enables the usage of libva-v4l2-request
|
||
driver.
|
||
|
||
- Added support for XDG-shell protocol as wl_shell replacement which
|
||
is currently deprecated. This change add as dependency
|
||
wayland-protocol.
|
||
|
||
- GstVaapiFilter, GstVaapiWindow, and GstVaapiDecoder classes now
|
||
inherit from GstObject, gaining all the GStreamer’s instrumentation
|
||
support.
|
||
|
||
- The metadata now specifies the plugin as Hardware class.
|
||
|
||
- H264 decoder is more stable with problematic streams.
|
||
|
||
- In H265 decoder added support for profiles main-422-10 (P010_10LE),
|
||
main-444 (AYUV) and main-444-10 (Y410)
|
||
|
||
- JPEG decoder handles dynamic resolution changes.
|
||
|
||
- More specification adherence in H264 and H265 encoders.
|
||
|
||
|
||
GStreamer OMX
|
||
|
||
- Add support of NV16 format to video encoders input.
|
||
|
||
- Video decoders now handle the ALLOCATION query to tell upstream
|
||
about the number of buffers they require. Video encoders will also
|
||
use this query to adjust their number of allocated buffers
|
||
preventing starvation when using dynamic buffer mode.
|
||
|
||
- The OMX_PERFORMANCE debug category has been renamed to OMX_API_TRACE
|
||
and can now be used to track a widder variety of interactions
|
||
between OMX and GStreamer.
|
||
|
||
- Video encoders will now detect frame rate only changes and will
|
||
inform OMX about it rather than doing a full format reset.
|
||
|
||
- Various Zynq UltraScale+ specific improvements:
|
||
- Video encoders are now able to import dmabuf from upstream.
|
||
- Support for HEVC range extension profiles and more AVC profiles.
|
||
- We can now request video encoders to generate an IDR using the
|
||
force key unit event.
|
||
|
||
|
||
GStreamer Editing Services and NLE
|
||
|
||
- Added a gesdemux element, it is an auto pluggable element that
|
||
allows decoding edit list like files supported by GES
|
||
|
||
- Added gessrc which wraps a GESTimeline as a standard source element
|
||
(implementing the ges protocol handler)
|
||
|
||
- Added basic support for videorate::rate property potentially
|
||
allowing changing playback speed
|
||
|
||
- Layer priority is now fully automatic and they should be moved with
|
||
the new ges_timeline_move_layer method, ges_layer_set_priority is
|
||
now deprecated.
|
||
|
||
- Added a ges_timeline_element_get_layer_priority so we can simply get
|
||
all information about GESTimelineElement position in the timeline
|
||
|
||
- GESVideoSource now auto orientates the images if it is defined in a
|
||
meta (overridable).
|
||
|
||
- Added some PyGObject overrides to make the API more pythonic
|
||
|
||
- The threading model has been made more explicit with safe guard to
|
||
make sure not thread safe APIs are not used from the wrong threads.
|
||
It is also now possible to properly handle in what thread the API
|
||
should be used.
|
||
|
||
- Optimized GESClip and GESTrackElement creation
|
||
|
||
- Added a way to compile out the old, unused and deprecated
|
||
GESPitiviFormatter
|
||
|
||
- Re implemented the timeline editing API making it faster and making
|
||
the code much more maintainable
|
||
|
||
- Simplified usage of nlecomposition outside GES by removing quirks in
|
||
it API usage and removing the need to treat it specially from an
|
||
application perspective.
|
||
|
||
- ges-launch-1.0:
|
||
|
||
- Added support to add titles to the timeline
|
||
- Enhance the help auto generating it from the code
|
||
|
||
- Deprecate ges_timeline_load_from_uri as loading the timeline should
|
||
be done through a project now
|
||
|
||
- MANY leaks have been plugged and the unit testsuite is now “leak
|
||
free”
|
||
|
||
|
||
GStreamer validate
|
||
|
||
- Added an action type to verify the checksum of the sink last-sample
|
||
|
||
- Added an include keyword to validate scenarios
|
||
|
||
- Added the notion of variable in scenarios, with the set-vars keyword
|
||
|
||
- Started adding support for “performance” like tests by allowing to
|
||
define the number of dropped buffers or the minimum buffer frequency
|
||
on a specific pad
|
||
|
||
- Added a validateflow plugin which allows defining the data flow to
|
||
be seen on a particular pad and verifying that following runs match
|
||
the expectations
|
||
|
||
- Added support for appsrc based test definition so we can instrument
|
||
the data pushed into the pipeline from scenarios
|
||
|
||
- Added a mockdecryptor allowing adding tests with on encrypted files,
|
||
the element will potentially be instrumented with a validate
|
||
scenario
|
||
|
||
- gst-validate-launcher:
|
||
|
||
- Cleaned up output
|
||
|
||
- Changed the default for “muting” tests as user doesn’t expect
|
||
hundreds of windows to show up when running the testsuite
|
||
|
||
- Fixed the outputted xunit files to be compatible with GitLab
|
||
|
||
- Added support to run tests on media files in push mode (using
|
||
pushfile://)
|
||
|
||
- Added support for running inside gst-build
|
||
|
||
- Added support for running ssim tests on rendered files
|
||
|
||
- Added a way to simply define tests on pipelines through a simple
|
||
.json file
|
||
|
||
- Added a python app to easily run python testsuite reusing all
|
||
the launcher features
|
||
|
||
- Added flatpak knowledge so we can print backtrace even when
|
||
running from within flatpak
|
||
|
||
- Added a way to automatically generated “known issues”
|
||
suppressions lines
|
||
|
||
- Added a way to rerun tests to check if they are flaky and added
|
||
a way to tolerate tests known to be flaky
|
||
|
||
- Add a way to output html log files
|
||
|
||
|
||
GStreamer Python Bindings
|
||
|
||
- add binding for gst_pad_set_caps()
|
||
|
||
- pygobject dependency requirement was bumped to >= 3.8
|
||
|
||
- new audiotestsrc, audioplot, and mixer plugin examples, and a
|
||
dynamic pipeline example
|
||
|
||
|
||
GStreamer C# Bindings
|
||
|
||
- bindings for the GstWebRTC library
|
||
|
||
|
||
GStreamer Rust Bindings
|
||
|
||
The GStreamer Rust bindings are now officially part of the GStreamer
|
||
project and are also maintained in the GStreamer GitLab.
|
||
|
||
The releases will generally not be synchronized with the releases of
|
||
other GStreamer parts due to dependencies on other projects.
|
||
|
||
Also unlike the other GStreamer libraries, the bindings will not commit
|
||
to full API stability but instead will follow the approach that is
|
||
generally taken by Rust projects, e.g.:
|
||
|
||
1) 0.12.X will be completely API compatible with all other 0.12.Y
|
||
versions.
|
||
2) 0.12.X+1 will contain bugfixes and compatible new feature additions.
|
||
3) 0.13.0 will _not_ be backwards compatible with 0.12.X but projects
|
||
will be able to stay at 0.12.X without any problems as long as they
|
||
don’t need newer features.
|
||
|
||
The current stable release is 0.12.2 and the next release series will be
|
||
0.13, probably around March 2019.
|
||
|
||
At this point the bindings cover most of GStreamer core (except for most
|
||
notably GstAllocator and GstMemory), and most parts of the app, audio,
|
||
base, check, editing-services, gl, net. pbutils, player, rtsp,
|
||
rtsp-server, sdp, video and webrtc libraries.
|
||
|
||
Also included is support for creating subclasses of the following types
|
||
and writing GStreamer plugins:
|
||
|
||
- gst::Element
|
||
- gst::Bin and gst::Pipeline
|
||
- gst::URIHandler and gst::ChildProxy
|
||
- gst::Pad, gst::GhostPad
|
||
- gst_base::Aggregator and gst_base::AggregatorPad
|
||
- gst_base::BaseSrc and gst_base::BaseSink
|
||
- gst_base::BaseTransform
|
||
|
||
Changes to 0.12.X since 0.12.0
|
||
|
||
Fixed
|
||
|
||
- PTP clock constructor actually creates a PTP instead of NTP clock
|
||
|
||
Added
|
||
|
||
- Bindings for GStreamer Editing Services
|
||
- Bindings for GStreamer Check testing library
|
||
- Bindings for the encoding profile API (encodebin)
|
||
|
||
- VideoFrame, VideoInfo, AudioInfo, StructureRef implements Send and
|
||
Sync now
|
||
- VideoFrame has a function to get the raw FFI pointer
|
||
- From impls from the Error/Success enums to the combined enums like
|
||
FlowReturn
|
||
- Bin-to-dot file functions were added to the Bin trait
|
||
- gst_base::Adapter implements SendUnique now
|
||
- More complete bindings for the gst_video::VideoOverlay interface,
|
||
especially
|
||
gst_video::is_video_overlay_prepare_window_handle_message()
|
||
|
||
Changed
|
||
|
||
- All references were updated from GitHub to freedesktop.org GitLab
|
||
- Fix various links in the README.md
|
||
- Link to the correct location for the documentation
|
||
- Remove GitLab badge as that only works with gitlab.com currently
|
||
|
||
Changes in git master for 0.13
|
||
|
||
Fixed
|
||
|
||
- gst::tag::Album is the album tag now instead of artist sortname
|
||
|
||
Added
|
||
|
||
- Subclassing infrastructure was moved directly into the bindings,
|
||
making the gst-plugin crate deprecated. This involves many API
|
||
changes but generally cleans up code and makes it more flexible.
|
||
Take a look at the gst-plugins-rs crate for various examples.
|
||
|
||
- Bindings for CapsFeatures and Meta
|
||
- Bindings for
|
||
ParentBufferMeta,VideoMetaandVideoOverlayCompositionMeta`
|
||
- Bindings for VideoOverlayComposition and VideoOverlayRectangle
|
||
- Bindings for VideoTimeCode
|
||
|
||
- UniqueFlowCombiner and UniqueAdapter wrappers that make use of the
|
||
Rust compile-time mutability checks and expose more API in a safe
|
||
way, and as a side-effect implement Sync and Send now
|
||
|
||
- More complete bindings for Allocation Query
|
||
- pbutils functions for codec descriptions
|
||
- TagList::iter() for iterating over all tags while getting a single
|
||
value per tag. The old ::iter_tag_list() function was renamed to
|
||
::iter_generic() and still provides access to each value for a tag
|
||
- Bus::iter() and Bus::iter_timed() iterators around the corresponding
|
||
::pop\*() functions
|
||
|
||
- serde serialization of Value can also handle Buffer now
|
||
|
||
- Extensive comments to all examples with explanations
|
||
- Transmuxing example showing how to use typefind, multiqueue and
|
||
dynamic pads
|
||
- basic-tutorial-12 was ported and added
|
||
|
||
Changed
|
||
|
||
- Rust 1.31 is the minimum supported Rust version now
|
||
- Update to latest gir code generator and glib bindings
|
||
|
||
- Functions returning e.g. gst::FlowReturn or other “combined” enums
|
||
were changed to return split enums like
|
||
Result<gst::FlowSuccess, gst::FlowError> to allow usage of the
|
||
standard Rust error handling.
|
||
|
||
- MiniObject subclasses are now newtype wrappers around the underlying
|
||
GstRc<FooRef> wrapper. This does not change the API in any breaking
|
||
way for the current usages, but allows MiniObjects to also be
|
||
implemented in other crates and makes sure rustdoc places the
|
||
documentation in the right places.
|
||
|
||
- BinExt extension trait was renamed to GstBinExt to prevent conflicts
|
||
with gtk::Bin if both are imported
|
||
|
||
- Buffer::from_slice() can’t possible return None
|
||
|
||
- Various clippy warnings
|
||
|
||
|
||
GStreamer Rust Plugins
|
||
|
||
Like the GStreamer Rust bindings, the Rust plugins are now officially
|
||
part of the GStreamer project and are also maintained in the GStreamer
|
||
GitLab.
|
||
|
||
In the 0.3.x versions this contained infrastructure for writing
|
||
GStreamer plugins in Rust, and a set of plugins.
|
||
|
||
In git master that infrastructure was moved to the GLib and GStreamer
|
||
bindings directly, together with many other improvements that were made
|
||
possible by this, so the gst-plugins-rs repository only contains
|
||
GStreamer elements now.
|
||
|
||
Elements included are:
|
||
|
||
- Tutorials plugin: identity, rgb2gray and sinesrc with extensive
|
||
comments
|
||
|
||
- rsaudioecho, a port of the audiofx element
|
||
|
||
- rsfilesrc, rsfilesink
|
||
|
||
- rsflvdemux, a FLV demuxer. Not feature-equivalent with flvdemux yet
|
||
|
||
- threadshare plugin: ts-appsrc, ts-proxysrc/sink, ts-queue, ts-udpsrc
|
||
and ts-tcpclientsrc elements that use a fixed number of threads and
|
||
share them between instances. For more background about these
|
||
elements see Sebastian’s talk “When adding more threads adds more
|
||
problems - Thread-sharing between elements in GStreamer” at the
|
||
GStreamer Conference 2017.
|
||
|
||
- rshttpsrc, a HTTP source around the hyper/reqwest Rust libraries.
|
||
Not feature-equivalent with souphttpsrc yet.
|
||
|
||
- togglerecord, an element that allows to start/stop recording at any
|
||
time and keeps all audio/video streams in sync.
|
||
|
||
- mccparse and mccenc, parsers and encoders for the MCC closed caption
|
||
file format.
|
||
|
||
Changes to 0.3.X since 0.3.0
|
||
|
||
- All references were updated from GitHub to freedesktop.org GitLab
|
||
- Fix various links in the README.md
|
||
- Link to the correct location for the documentation
|
||
|
||
Changes in git master for 0.4
|
||
|
||
- togglerecord: Switch to parking_lot crate for mutexes/condition
|
||
variables for lower overhead
|
||
- Merge threadshare plugin here
|
||
- New closedcaption plugin with mccparse and mccenc elements
|
||
- New identity element for the tutorials plugin
|
||
|
||
- Register plugins statically in tests instead of relying on the
|
||
plugin loader to find the shared library in a specific place
|
||
|
||
- Update to the latest API changes in the GLib and GStreamer bindings
|
||
- Update to the latest versions of all crates
|
||
|
||
|
||
Build and Dependencies
|
||
|
||
- The MESON BUILD SYSTEM BUILD IS NOW FEATURE-COMPLETE (*) and it is
|
||
now the recommended build system on all platforms and also used by
|
||
Cerbero to build GStreamer on all platforms. The Autotools build is
|
||
scheduled to be removed in the next cycle. Developers who currently
|
||
use gst-uninstalled should move to gst-build. The build option
|
||
naming has been cleaned up and made consistent and there are now
|
||
feature options to enable/disable plugins and various other features
|
||
on a case-by-case basis. (*) with the exception of plugin docs which
|
||
will be handled differently in future
|
||
|
||
- Symbol export in libraries is now controlled via explicit exports
|
||
using symbol visibility or export defines where supported, to ensure
|
||
consistency across all platforms. This also allows libraries to have
|
||
exports that vary based on detected platform features and configure
|
||
options as is the case with the GStreamer OpenGL integration library
|
||
for example. A few symbols that had been exported by accident in
|
||
earlier versions may no longer be exported. These symbols will not
|
||
have had declarations in any public header files then though and
|
||
would not have been usable.
|
||
|
||
- The GStreamer FFmpeg wrapper plugin (gst-libav) now depends on
|
||
FFmpeg 4.x and uses the new FFmpeg 4.x API and stopped relying on
|
||
ancient API that was removed with the FFmpeg 4.x release. This means
|
||
that it is no longer possible to build this module against an older
|
||
system-provided FFmpeg 3.x version. Use the internal FFmpeg 4.x copy
|
||
instead if you build using autotools, or use gst-libav 1.14.x
|
||
instead which targets the FFmpeg 3.x API and _should_ work fine in
|
||
combination with a newer GStreamer. It’s difficult for us to support
|
||
both old and new FFmpeg APIs at the same time, apologies for any
|
||
inconvenience caused.
|
||
|
||
- Hardware-accelerated Nvidia video encoder/decoder plugins nvdec and
|
||
nvenc can be built against CUDA Toolkit versions 9 and 10.0 now. The
|
||
dynlink interface has been dropped since it’s deprecated in 10.0.
|
||
|
||
- The (optional) OpenCV requirement has been bumped to >= 3.0.0 and
|
||
the plugin can also be built against OpenCV 4.x now.
|
||
|
||
- New sctp plugin based on usrsctp (for WebRTC data channels)
|
||
|
||
Cerbero
|
||
|
||
Cerbero is a meta build system used to build GStreamer plus dependencies
|
||
on platforms where dependencies are not readily available, such as
|
||
Windows, Android, iOS and macOS.
|
||
|
||
Cerbero has seen a number of improvements:
|
||
|
||
- Cerbero has been ported to Python 3 and requires Python 3.5 or newer
|
||
now
|
||
|
||
- Source tarballs are now protected by checksums in the recipes to
|
||
guard against download errors and malicious takeover of projects or
|
||
websites. In addition, downloads are only allowed via secure
|
||
transports now and plain HTTP, FTP and git:// transports are not
|
||
allowed anymore.
|
||
|
||
- There is now a new fetch-bootstrap command which downloads sources
|
||
required for bootstrapping, with an optional --build-tools-only
|
||
argument to match the bootstrap --build-tools-only command.
|
||
|
||
- The bootstrap, build, package and bundle-source commands gained a
|
||
new --offline switch that ensures that only sources from the cache
|
||
are used and never downloaded via the network. This is useful in
|
||
combination with the fetch and fetch-bootstrap commands that acquire
|
||
sources ahead of time before any build steps are executed. This
|
||
allows more control over the sources used and when sources are
|
||
updated, and is particularly useful for build environments that
|
||
don’t have network access.
|
||
|
||
- bootstrap --assume-yes will automatically say ‘yes’ to any
|
||
interactive prompts during the bootstrap stage, such as those from
|
||
apt-get or yum.
|
||
|
||
- bootstrap --system-only will only bootstrap the system without build
|
||
tools.
|
||
|
||
- Manifest support: The build manifest can be used in continuous
|
||
integration (CI) systems to fixate the Git revision of certain
|
||
projects so that all builds of a pipeline are on the same reference.
|
||
This is used in GStreamer’s gitlab CI for example. It can also be
|
||
used in order to re-produce a specific build. To set a manifest, you
|
||
can set manifest = 'my_manifest.xml' in your configuration file, or
|
||
use the --manifest command line option. The command line option will
|
||
take precendence over anything specific in the configuration file.
|
||
|
||
- The new build-deps command can be used to build only the
|
||
dependencies of a recipe, without the recipe itself.
|
||
|
||
- new --list-variants command to list available variants
|
||
|
||
- variants can now be set on the command line via the -v option as a
|
||
comma-separated list. This overrides any variants set in any
|
||
configuration files.
|
||
|
||
- new qt5, intelmsdk and nvidia variants for enabling Qt5 and hardware
|
||
codec support. See the Enabling Optional Features with Variants
|
||
section in the Cerbero documentation for more details how to enable
|
||
and use these variants.
|
||
|
||
- A new -t / --timestamp command line switch makes commands print
|
||
timestamps
|
||
|
||
|
||
Platform-specific changes and improvements
|
||
|
||
Android
|
||
|
||
- toolchain: update compiler to clang and NDKr18. NDK r18 removed the
|
||
armv5 target and only has Android platforms that target at least
|
||
armv7 so the armv5 target is not useful anymore.
|
||
|
||
- The way that GIO modules are named has changed due to upstream GLib
|
||
natively adding support for loading static GIO modules. This means
|
||
that any GStreamer application using gnutls for SSL/TLS on the
|
||
Android or iOS platforms (or any other setup using static libraries)
|
||
will fail to link looking for the g_io_module_gnutls_load_static()
|
||
function. The new function name is now
|
||
g_io_gnutls_load(gpointer data). data can be NULL for a static
|
||
library. Look at this commit for the necessary change in the
|
||
examples.
|
||
|
||
- various build issues on Android have been fixed.
|
||
|
||
macOS and iOS
|
||
|
||
- various build issues on iOS have been fixed.
|
||
|
||
- the minimum required iOS version is now 9.0. The difference in
|
||
adoption between 8.0 and 9.0 is 0.1% and the bump to 9.0 fixes some
|
||
build issues.
|
||
|
||
- The way that GIO modules are named has changed due to upstream GLib
|
||
natively adding support for loading static GIO modules. This means
|
||
that any GStreamer application using gnutls for SSL/TLS on the
|
||
Android or iOS platforms (or any other setup using static libraries)
|
||
will fail to link looking for the g_io_module_gnutls_load_static()
|
||
function. The new function name is now
|
||
g_io_gnutls_load(gpointer data). data can be NULL for a static
|
||
library. Look at this commit for the necessary change in the
|
||
examples.
|
||
|
||
Windows
|
||
|
||
- The webrtcdsp element is shipped again as part of the Windows binary
|
||
packages, the build system issue has been resolved.
|
||
|
||
- ‘Inconsistent DLL linkage’ warnings when building with MSVC have
|
||
been fixed
|
||
|
||
- Hardware-accelerated Nvidia video encoder/decoder plugins nvdec and
|
||
nvenc build on Windows now, also with MSVC and using Meson.
|
||
|
||
- The ksvideosrc camera capture plugin supports 16-bit grayscale video
|
||
now
|
||
|
||
- The wasapisrc audio capture element implements loopback recording
|
||
from another output device or sink
|
||
|
||
- wasapisink recover from low buffer levels in shared mode and some
|
||
exclusive mode fixes
|
||
|
||
- dshowsrc now implements the GstDeviceMonitor interface
|
||
|
||
|
||
Contributors
|
||
|
||
Aaron Boxer, Aleix Conchillo Flaqué, Alessandro Decina, Alexandru Băluț,
|
||
Alex Ashley, Alexey Chernov, Alicia Boya García, Amit Pandya, Andoni
|
||
Morales Alastruey, Andreas Frisch, Andre McCurdy, Andy Green, Anthony
|
||
Violo, Antoine Jacoutot, Antonio Ospite, Arun Raghavan, Aurelien Jarno,
|
||
Aurélien Zanelli, ayaka, Bananahemic, Bastian Köcher, Branko Subasic,
|
||
Brendan Shanks, Carlos Rafael Giani, Charlie Turner, Christoph Reiter,
|
||
Corentin Noël, Daeseok Youn, Damian Vicino, Dan Kegel, Daniel Drake,
|
||
Daniel Klamt, Danilo Spinella, Dardo D Kleiner, David Ing, David
|
||
Svensson Fors, Devarsh Thakkar, Dimitrios Katsaros, Edward Hervey,
|
||
Emilio Pozuelo Monfort, Enrique Ocaña González, Erlend Eriksen, Ezequiel
|
||
Garcia, Fabien Dessenne, Fabrizio Gennari, Florent Thiéry, Francisco
|
||
Velazquez, Freyr666, Garima Gaur, Gary Bisson, George Kiagiadakis, Georg
|
||
Lippitsch, Georg Ottinger, Geunsik Lim, Göran Jönsson, Guillaume
|
||
Desmottes, H1Gdev, Haihao Xiang, Haihua Hu, Harshad Khedkar, Havard
|
||
Graff, He Junyan, Hoonhee Lee, Hosang Lee, Hyunjun Ko, Ilya Smelykh,
|
||
Ingo Randolf, Iñigo Huguet, Jakub Adam, James Stevenson, Jan Alexander
|
||
Steffens, Jan Schmidt, Jerome Laheurte, Jimmy Ohn, Joakim Johansson,
|
||
Jochen Henneberg, Johan Bjäreholt, John-Mark Bell, John Bassett, John
|
||
Nikolaides, Jonathan Karlsson, Jonny Lamb, Jordan Petridis, Josep Torra,
|
||
Joshua M. Doe, Jos van Egmond, Juan Navarro, Julian Bouzas, Jun Xie,
|
||
Junyan He, Justin Kim, Kai Kang, Kim Tae Soo, Kirill Marinushkin, Kyrylo
|
||
Polezhaiev, Lars Petter Endresen, Linus Svensson, Louis-Francis
|
||
Ratté-Boulianne, Lucas Stach, Luis de Bethencourt, Luz Paz, Lyon Wang,
|
||
Maciej Wolny, Marc-André Lureau, Marc Leeman, Marco Trevisan (Treviño),
|
||
Marcos Kintschner, Marian Mihailescu, Marinus Schraal, Mark Nauwelaerts,
|
||
Marouen Ghodhbane, Martin Kelly, Matej Knopp, Mathieu Duponchelle,
|
||
Matteo Valdina, Matthew Waters, Matthias Fend, memeka, Michael Drake,
|
||
Michael Gruner, Michael Olbrich, Michael Tretter, Miguel Paris, Mike
|
||
Wey, Mikhail Fludkov, Naveen Cherukuri, Nicola Murino, Nicolas Dufresne,
|
||
Niels De Graef, Nirbheek Chauhan, Norbert Wesp, Ognyan Tonchev, Olivier
|
||
Crête, Omar Akkila, Pat DeSantis, Patricia Muscalu, Patrick Radizi,
|
||
Patrik Nilsson, Paul Kocialkowski, Per Forlin, Peter Körner, Peter
|
||
Seiderer, Petr Kulhavy, Philippe Normand, Philippe Renon, Philipp Zabel,
|
||
Pierre Labastie, Piotr Drąg, Roland Jon, Roman Sivriver, Roman Shpuntov,
|
||
Rosen Penev, Russel Winder, Sam Gigliotti, Santiago Carot-Nemesio,
|
||
Sean-Der, Sebastian Dröge, Seungha Yang, Shi Yan, Sjoerd Simons, Snir
|
||
Sheriber, Song Bing, Soon, Thean Siew, Sreerenj Balachandran, Stefan
|
||
Ringel, Stephane Cerveau, Stian Selnes, Suhas Nayak, Takeshi Sato,
|
||
Thiago Santos, Thibault Saunier, Thomas Bluemel, Tianhao Liu,
|
||
Tim-Philipp Müller, Tobias Ronge, Tomasz Andrzejak, Tomislav Tustonić,
|
||
U. Artie Eoff, Ulf Olsson, Varunkumar Allagadapa, Víctor Guzmán, Víctor
|
||
Manuel Jáquez Leal, Vincenzo Bono, Vineeth T M, Vivia Nikolaidou, Wang
|
||
Fei, wangzq, Whoopie, Wim Taymans, Wind Yuan, Wonchul Lee, Xabier
|
||
Rodriguez Calvar, Xavier Claessens, Haihao Xiang, Yacine Bandou,
|
||
Yeongjin Jeong, Yuji Kuwabara, Zeeshan Ali,
|
||
|
||
… and many others who have contributed bug reports, translations, sent
|
||
suggestions or helped testing.
|
||
|
||
|
||
Stable 1.16 branch
|
||
|
||
After the 1.16.0 release there will be several 1.16.x bug-fix releases
|
||
which will contain bug fixes which have been deemed suitable for a
|
||
stable branch, but no new features or intrusive changes will be added to
|
||
a bug-fix release usually. The 1.16.x bug-fix releases will be made from
|
||
the git 1.16 branch, which is a stable branch.
|
||
|
||
1.16.0
|
||
|
||
1.16.0 was released on 19 April 2019.
|
||
|
||
|
||
Known Issues
|
||
|
||
- possibly breaking/incompatible changes to properties of wrapped
|
||
FFmpeg decoders and encoders (see above).
|
||
|
||
- The way that GIO modules are named has changed due to upstream GLib
|
||
natively adding support for loading static GIO modules. This means
|
||
that any GStreamer application using gnutls for SSL/TLS on the
|
||
Android or iOS platforms (or any other setup using static libraries)
|
||
will fail to link looking for the g_io_module_gnutls_load_static()
|
||
function. The new function name is now
|
||
g_io_gnutls_load(gpointer data). See Android/iOS sections above for
|
||
further details.
|
||
|
||
|
||
Schedule for 1.18
|
||
|
||
Our next major feature release will be 1.18, and 1.17 will be the
|
||
unstable development version leading up to the stable 1.18 release. The
|
||
development of 1.17/1.18 will happen in the git master branch.
|
||
|
||
The plan for the 1.18 development cycle is yet to be confirmed, but it
|
||
is possible that the next cycle will be a short one in which case
|
||
feature freeze would be perhaps around August 2019 with a new 1.18
|
||
stable release in September.
|
||
|
||
1.18 will be backwards-compatible to the stable 1.16, 1.14, 1.12, 1.10,
|
||
1.8, 1.6, 1.4, 1.2 and 1.0 release series.
|
||
|
||
------------------------------------------------------------------------
|
||
|
||
_These release notes have been prepared by Tim-Philipp Müller with_
|
||
_contributions from Sebastian Dröge, Guillaume Desmottes, Matthew
|
||
Waters, _ _Thibault Saunier, and Víctor Manuel Jáquez Leal._
|
||
|
||
_License: CC BY-SA 4.0_
|