mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-01 22:21:13 +00:00

History

Xavier Claessens d86a6715e1 aja: Replace global semaphore with per-device flock() The global semaphore was never closed/unlinked, causing permission denied issue if the device is later used by another user. Properly removing the semaphore when stopping the pipeline would still leave it open in case of a crash. With a GStreamer specific name, it was also not preventing other apps to access the device concurrently. Finally, if the system has multiple cards, the lock should be per card and not global (to be confirmed). Fixes: #3283. Sponsored-by: Netflix Inc. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6117>		2024-02-15 09:30:20 +00:00
..
.clang-format
gstajacommon.cpp	aja: Replace global semaphore with per-device flock()	2024-02-15 09:30:20 +00:00
gstajacommon.h	aja: Replace global semaphore with per-device flock()	2024-02-15 09:30:20 +00:00
gstajadeviceprovider.cpp
gstajadeviceprovider.h
gstajasink.cpp	aja: Replace global semaphore with per-device flock()	2024-02-15 09:30:20 +00:00
gstajasink.h
gstajasinkcombiner.cpp
gstajasinkcombiner.h
gstajasrc.cpp	aja: Replace global semaphore with per-device flock()	2024-02-15 09:30:20 +00:00
gstajasrc.h
gstajasrcdemux.cpp
gstajasrcdemux.h
meson.build
plugin.cpp
README.md

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