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gstreamer/subprojects/gst-plugins-bad/sys/aja
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Sebastian Dröge 3eec4703c6 ajasrc: Fix handling of timestamps and don't rely on driver frame counters 
The driver frame counters (processed, dropped, buffer level) are not
always correct apparently, and don't allow reliably assigning a frame
number to captured frames.

Instead of relying on them, count the number of frames directly here and
detect dropped frames based on the capture times of the frames: if more
than 1.75 frame durations are between two frames, then there must've
been a dropped frame.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7163>
2024-07-16 09:59:36 +00:00
..
.clang-format aja: Move clang-format configuration from the top-level to the plugin subdirectory 2023-10-27 11:44:36 +00:00
gstajacommon.cpp gst: Move GstQueueArray as GstVecDeque to core 2024-05-06 18:25:42 +00:00
gstajacommon.h gst: Move GstQueueArray as GstVecDeque to core 2024-05-06 18:25:42 +00:00
gstajadeviceprovider.cpp Prepare for merging into GStreamer 2023-10-26 09:27:46 +03:00
gstajadeviceprovider.h Prepare for merging into GStreamer 2023-10-26 09:27:46 +03:00
gstajasink.cpp gst: Move GstQueueArray as GstVecDeque to core 2024-05-06 18:25:42 +00:00
gstajasink.h gst: Move GstQueueArray as GstVecDeque to core 2024-05-06 18:25:42 +00:00
gstajasinkcombiner.cpp Prepare for merging into GStreamer 2023-10-26 09:27:46 +03:00
gstajasinkcombiner.h Prepare for merging into GStreamer 2023-10-26 09:27:46 +03:00
gstajasrc.cpp ajasrc: Fix handling of timestamps and don't rely on driver frame counters 2024-07-16 09:59:36 +00:00
gstajasrc.h gst: Move GstQueueArray as GstVecDeque to core 2024-05-06 18:25:42 +00:00
gstajasrcdemux.cpp Prepare for merging into GStreamer 2023-10-26 09:27:46 +03:00
gstajasrcdemux.h Prepare for merging into GStreamer 2023-10-26 09:27:46 +03:00
meson.build aja: Update to AJA NTV2 17.0.1 2024-05-11 15:54:54 +00:00
plugin.cpp aja: Add basic documentation 2023-10-26 09:36:10 +03:00
README.md aja: Add basic documentation 2023-10-26 09:36:10 +03:00

README.md

GStreamer AJA source/sink plugin

GStreamer plugin for AJA capture and output cards.

This plugin requires the AJA NTV2 SDK version 16 or newer.

The location of the SDK can be configured via the aja-sdk-dir meson option. If no location is given then the NTV2 SDK from GitHub is compiled as a meson subproject as part of the plugin.

Example usage

Capture 1080p30 audio/video and display it locally

gst-launch-1.0 ajasrc video-format=1080p-3000 ! ajasrcdemux name=d \
    d.video ! queue max-size-bytes=0 max-size-buffers=0 max-size-time=1000000000 ! videoconvert ! autovideosink \
    d.audio ! queue max-size-bytes=0 max-size-buffers=0 max-size-time=1000000000 ! audioconvert ! audioresample ! autoaudiosink

Output a 1080p2997 test audio/video stream

gst-launch-1.0 videotestsrc pattern=ball ! video/x-raw,format=v210,width=1920,height=1080,framerate=30000/1001,interlace-mode=progressive ! timeoverlay ! timecodestamper ! combiner.video \
    audiotestsrc freq=440 ! audio/x-raw,format=S32LE,rate=48000,channels=16 ! audiobuffersplit output-buffer-duration=1/30 ! combiner.audio \
    ajasinkcombiner name=combiner ! ajasink channel=0

Capture 1080p30 audio/video and directly output it again on the same card

gst-launch-1.0 ajasrc video-format=1080p-3000 channel=1 input-source=sdi-1 audio-system=2 ! ajasrcdemux name=d \
    d.video ! queue max-size-bytes=0 max-size-buffers=0 max-size-time=1000000000 ! c.video \
    d.audio ! queue max-size-bytes=0 max-size-buffers=0 max-size-time=1000000000 ! c.audio \
    ajasinkcombiner name=c ! ajasink channel=0 reference-source=input-1