Dear all,
I am a v4l2 capture driver developer and I have encountered a problem when requesting I420 pixel format with:
gst-launch-1.0 v4l2src device=/dev/video4 ! video/x-raw, format=I420, width=1920, height=1080, framerate=30/1 ! autovideosink
The above pipeline results in broken picture (see attached). Note that my driver does not support I420 and what I see requested from the driver is YUYV (0x56595559) so I think there is a conversion done in libv4l2. I first wrote to GStreamer and got an answer confirming it: the emulation is done in libv4l2.
Can there be a bug while converting YUYV to I420 in libv4l2?
Requesting other formats which driver supports (no v4l2 emulation involved) results in the correct captured image (see attached).
Best regards,
Przemek
Przemek Gajos
Software Engineer
[Datapath]<http://www.datapath.co.uk/>
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T:+44 (0)1332 294 441 | www.datapath.co.uk<http://www.datapath.co.uk>
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