gstreamer/subprojects/gst-plugins-bad/sys/aja/README.md

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2021-02-09 14:22:18 +00:00
# GStreamer AJA source/sink plugin
[GStreamer](https://gstreamer.freedesktop.org/) plugin for
[AJA](https://www.aja.com) 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](https://github.com/aja-video/ntv2.git) is compiled as a meson
subproject as part of the plugin.
2021-02-09 14:22:18 +00:00
## Example usage
Capture 1080p30 audio/video and display it locally
```sh
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
```sh
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
```sh
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
```