video jitter

[Nicolas Dufresne]

Le vendredi 23 avril 2021 à 16:47 +0800, James Linder via gstreamer-devel a
écrit :
> G’day
> 
> I am (trying out) creating a pipeline to view in 1080
> 
> gst-launch-1.0 -v -e  v4l2src name=source device=/dev/video2 ! \
>             video/x-h264,width=1920,height=1080,framerate=30/1 ! \
>             h264parse ! avdec_h264 ! \

If you mimic playbin3, you'd add a queue between h264parse and avec_h264, that
will avoid loosing frames in v4l2src live source. Please compare against:

gst-play-1.0 --use-playbin3 v4l2:///dev/video2

>             xvimagesink

XV may or may not be the best option for displaying your stream. This entirely
depend on the platform, the OS and the display environment you are using.

> 
> I have tried a queue throught the chain without seeing any change.
> htop shows 4 cores at 30ish %.
> 
> using mplayer directly on the source shows 4 cores at 60ish % with absolutely smooth playback.
> -v says nothing that grabs attention.
> 
> Can anybody say ah-ha do this-or-that?
> Thanks
> James
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