[Bug 728438] v4l2: Implement a v4l2 video encoder

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=728438

--- Comment #71 from Todor Tomov <todor.tomov at linaro.org> ---
(In reply to ayaka from comment #70)
> (In reply to Todor Tomov from comment #69)
> 
> > 
> > v4l2src device=/dev/video3 io-mode=dmabuf-import !
> > video/x-raw,format=NV12,width=1280,height=960,framerate=30/1 !
> > v4l2video4h264enc output-io-mode=dmabuf
> > extra-controls="controls,h264_profile=4,video_bitrate=200000;" ! h264parse !
> > mp4mux ! filesink
> > 
> > Is it the case that the encoder plugin does not support
> > "output-io-mode=dmabuf" correctly?
> I think so, it should support userptr, but I don't think it is necessary to
> do that as it would invoke the IOMMU which decrease the speed.

Ok, so as I understand it is not a bug but missing implementation. Do you know
in more details what needs to be done for the output-io-mode=dmabuf support?

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