Raw Use Case

Multimedia User Guide (UG1449)

Document ID
UG1449
Release Date
2022-04-21
Revision
1.4 English

For RAW video stream only:

Use the following pipeline to play a raw video stream captured from an input source device:

gst-launch-1.0 v4l2src device=/dev/video0 io-mode=4 ! \
video/x-raw, width=3840, height=2160, format=NV12, framerate=60/1 ! \
queue ! kmssink bus-id="a0070000.v_mix"

In the preceding example, the live source device link is present under the /dev directory. Video stream resolution is 4kp and 60fps. Video stream color format is NV12.

For RAW video and audio stream:

Use the following pipeline to play raw video and audio captured from the input source device:

gst-launch-1.0 v4l2src device=/dev/video0 io-mode=4 ! video/x-raw, 
width=3840, height=2160, format=NV12, framerate=60/1 ! \
queue max-size-bytes=0 ! kmssink bus-id="a0070000.v_mix" alsasrc device=hw:2,1 ! \
audio/x-raw, rate=48000, channels=2, format=S24_32LE ! \
audioconvert ! audioresample ! \
audio/x-raw, rate=48000, channels=2, format=S24_32LE ! \
queue ! alsasink device="hw:2,0"

The preceding example shows that video and audio can be captured using a single gstreamer pipeline. Audio capture device is hw:2,1 and playback device is hw:2,0. For video stream, the pipeline remains the same as the previous example.