[mythtv-users] VDPAU deinterlacers in trunk

David Knight dlknight at sdf.lonestar.org
Wed Dec 10 09:48:57 UTC 2008


Just wanted to check if anyone else is seeing the following issues. I'm
running trunk version 19298 with VDPAU, libfaad and opengl vsync enabled.
NVIDIA drivers 180.11 on a NVIDIA 8300 chipset.

If I select any of the two "Advanced" deinterlacers for playback of 1080i
h264 (BBC HD) then it stutters badly (audio and video), this is on a AMD
5200 X2, 1.5Gb System RAM and 512Mb GPU RAM.

I think the following entries in the backend log are associated with this:

2008-12-09 22:02:06.782 [h264 @ 0x5940860]B picture before any references,
skipping
2008-12-09 22:02:06.790 [h264 @ 0x5940860]decode_slice_header error
2008-12-09 22:02:06.799 [h264 @ 0x5940860]no frame!

Playing with the "Basic 2x" deinterlacer sometimes displays vertical
"tearing" lines on moving parts of the image. I enabled opengl vsync
yesterday evening and it improved playback, I also noticed the vertical
"tearing" issue wasn't present when viewing recordings and even live tv !
Yet this morning its back ?!?

Very impressed with the work so far on VDPAU, was getting around 100-180%
cpu usage across both cores before now between 10-20% !

Cheers

Dave K.



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