vaapipostproc and v4l2sink

[Víctor Jáquez]

On Tue, 23 Jan 2018 at 14:10, Thomas Scheuermann wrote:
> Hello List,
> 
> I've got the following problem with my pipeline. I want to connect
> vaapipostproc to v4l2sink without any additional element in between
> (copy). But I can't link these two elements. I let vaapipostproc
> generate I420 format and do some scaling but it only works if I put a
> videoconvert between vaapipostproc and v4l2sink.
> 
> vaapipostproc ! video/x-raw,format=I420 ! v4l2sink : NOK
> 
> vaapipostproc ! video/x-raw,format=I420 ! videoconvert ! v4l2sink : OK
> 
> But the additional videoconvert introduces another copy (I assume). The
> thing here which doesn't match between vaapipostproc and v4l2sink is the
> colorimetry. vaapipostproc produces in my example a colorimetry of
> 'bt709' but v4l2sink needs a colorimetry of '2:4:7:1'.
> 
> Is there a way to create this pipeline without a videoconvert?

It seems we have a problem with vaapipostproc handling the colorimetry

https://bugzilla.gnome.org/show_bug.cgi?id=791876

> 
> Regards,
> 
> Thomas
> 
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