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145 lines
7.7 KiB
Text
145 lines
7.7 KiB
Text
This is GStreamer Base Plugins 1.3.90
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Changes since 1.2:
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New API:
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• GstMessageType has GST_MESSAGE_EXTENDED added. All types before
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that can be used together as a flags type as before, but from
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that message onwards the types are just counted incrementally.
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This was necessary to be able to add more message types.
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In 2.0 GstMessageType will just become an enum and not a flags
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type anymore.
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• GstDeviceMonitor for device probing, e.g. to list all available
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audio or video capture devices. This is the replacement for
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GstPropertyProbe from 0.10.
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• Events accumulate the running-time offset now when travelling
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through pads, as set by the gst_pad_set_offset() function. This
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allows to compensate for this in the QOS event for example.
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• GstBuffer has a new flag "tag-memory" that is set automatically
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when memory is added or removed to a buffer. This allows buffer
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pools to detect if they can recycle a buffer or need to reset
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it first.
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• GstToc has new API to mark GstTocEntries as loops.
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• A not-authorized resource error has been defined to notify
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applications that accessing the resource has failed because
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of missing authorization and to distinguish this case from others.
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This change is actually already in 1.2.4.
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• GstPad has a new flag "accept-intersect", that will let the default
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ACCEPT_CAPS query handler do an intersection instead of subset check.
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This is interesting for parser elements that can handle incomplete
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caps.
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• GstCollectPads has support for flushing and a default handler for
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SEEK events now.
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• New GstFlowAggregator helper object that simplifies handling of
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flow returns in elements with multiple source pads. Additionally
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GstPad now always stores the last flow return and provides an
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API to retrieve it.
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• GstSegment has new API to offset the running time by a specific
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value and this is used in GstPad to allow positive and negative
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offsets in gst_pad_set_offset() in all situations.
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• Support for h265/HEVC and VP8 has been added to the codec utils and codec
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parsers library, and was integrated into various elements.
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• API for adjusting the TLS validation of RTSP connection has been added.
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• The RTSP and SDP library has MIKEY (RFC 3830) support now, and
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there is API to distinguish between the different RTSP profiles.
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• API to access RTP time information and statistics.
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• Support for auxiliary streams was added to rtpbin.
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• Support for tiled, raw video formats has been added.
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• GstVideoDecoder and GstAudioDecoder have API to help aggregating tag
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events and merge custom tags into them consistently.
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• GstBufferPool has support for flushing now.
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• playbin/playsink has support for application provided audio and video
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filters.
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• GstDiscoverer has new and simplified API to get details about missing
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plugins and information to pass to the plugin installer.
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• The GL library was merged from gst-plugins-gl to gst-plugins-bad,
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providing a generic infrastructure for handling GL inside GStreamer
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pipelines and a plugin with some elements using these, especially
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a video sink. Supported platforms currently are Android, Cocoa (OS X),
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DispManX (Raspberry Pi), EAGL (iOS), WGL (Windows) and generic X11,
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Wayland and EGL platforms.
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This replaces eglglessink and also is supposed to replace osxvideosink.
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• New GstAggregator base class in gst-plugins-bad. This is supposed to
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replace GstCollectPads in the future and fix long-known shortcomings
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in its API. Together with the base class some elements are provided
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already, like a videomixer (compositor).
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Major changes:
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• New plugins and elements:
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∘ v4l2videodec element for accessing hardware codecs on
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platforms that make them accessible via V4L2, e.g.
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Samsung Exynos. This comes together with major refactoring
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of the existing V4L2 elements and the corresponding
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infrastructure.
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The v4l2videodec element replaces the mfcdec element.
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∘ New downloadbuffer element that replaces the download
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buffering feature of queue2. Compared to queue2's code
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it is much simpler and only for this single use case.
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A noteworthy new feature is that it's downloading gaps
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in the already downloaded stream parts when nothing else
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is to be downloaded.
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This is now used by playbin when download buffering is
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enabled.
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∘ rtpstreampay and rtpstreamdepay elements for transmitting
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RTP packets over a stream API (e.g. TCP) according to
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RFC 4571.
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∘ rtprtx elements for standard compliant implementation of
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retransmissions, integrated into the rtpmanager plugin.
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∘ audiomixer element that mixes multiple audio streams together
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into a single one while keeping synchronization. This is
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planned to become the replacement of the adder element.
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∘ OpenNI2 plugin for 3D cameras like the Kinect camera.
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∘ OpenEXR plugin for decoding high-dynamic-range EXR images.
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∘ curlsshsink and curlsftpsink to write files via SSH/SFTP.
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∘ videosignal, ivfparse and sndfile plugins ported from 0.10.
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∘ avfvideosrc, vtdec and other elements were ported from 0.10 and
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are available on OS X and iOS now.
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• Other changes:
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∘ gst-libav now uses libav 10.1, and gained support for H265/HEVC.
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∘ Support for hardware codecs and special memory types has been
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improved with bugfixes and feature additions in various plugins
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and base classes.
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∘ Various bugfixes and improvements to buffering in queue2 and
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multiqueue elements.
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∘ dvbsrc supports more delivery mechanisms and other features
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now, including DVB S2 and T2 support.
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∘ The MPEGTS library has support for many more descriptors.
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∘ Major improvements to tsdemux and tsparse, especially time and
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seeking related.
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∘ souphttpsrc now has support for keep-alive connections,
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compression, configurable number of retries and configuration
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for SSL certificate validation.
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∘ hlsdemux has undergone major refactoring and works more
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reliable now and supports more HLS features like trick modes.
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Also fragments are pushed downstream while they're downloaded
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now instead of waiting for each fragment to finish.
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∘ dashdemux and mssdemux are now also pushing fragments downstream
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while they're downloaded instead of waiting for each fragment to
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finish.
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∘ videoflip can automatically flip based on the orientation tag.
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∘ openjpeg supports the OpenJPEG2 API.
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∘ waylandsink was refactored and should be more useful now. It also
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includes a small library which most likely is going to be removed
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in the future and will result in extensions to the GstVideoOverlay
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interface.
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∘ gst-rtsp-server supports SRTP and MIKEY now.
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∘ gst-libav encoders are now negotiating any profile/level settings
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with downstream via caps.
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∘ Lots of fixes for coverity warnings all over the place.
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∘ Negotiation related performance improvements.
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∘ 800+ fixed bug reports, and many other bug fixes and other
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improvements everywhere that had no bug report.
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Things to look out for:
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• The eglglessink element was removed and replaced by the glimagesink
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element.
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• The mfcdec element was removed and replaced by v4l2videodec.
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• osxvideosink is only available in OS X 10.6 or newer.
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• On Android the namespace of the automatically generated Java class
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for initialization of GStreamer has changed from com.gstreamer to
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org.freedesktop.gstreamer to prevent namespace pollution.
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• On iOS you have to update your gst_ios_init.h and gst_ios_init.m in
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your projects from the one included in the binaries if you used the
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GnuTLS GIO module before. The loading mechanism has slightly changed.
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