vdpau playout not smooth

[Robert Szelepcsenyi]

I have problems playing video using VDPAU acceleration on nVidia GPU's.

For example this pipeline

gst-launch-0.10 -v -m  filesrc location="test.mp4" ! qtdemux name=demux \ demux.video_00 ! vdpauh264dec ! queue ! vdpauvideopostprocess force-aspect-ratio="true" ! vdpausink \ demux.audio_00 ! ffdec_aac ! queue ! audioconvert ! alsasink

plays both video and audio correctly, but in most cases the video playout is not smooth. I can't call it choppy, but it exhibits some some sort of unpleasant tremor as if it were some synchronization issue. If I resize the window or minimize/maximize it, in most cases the problem disappears.

Vdpau playout with mplayer is without any problems. It must be some problem with the vdpau functionality of gstreamer.


Robert

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