[mythtv-users] Buffer problems with VDPAU

[Mark Kendall]

On 16 March 2011 08:27, Josu Lazkano <josu.lazkano at gmail.com> wrote:
> Hello, I am getting problems with VDPAU since I start with MythTV (one
> year ago). I am using Debian Squeeze with debian-multimedia
> repository, on the playback menu I have "VDPAU Normal" profile. This
> is what I get on the frontend when I try to watch satellite HD
> channels:
>
> 2011-03-16 01:01:07.009 [h264 @ 0xb4c70f60]non-existing PPS 0 referenced
> 2011-03-16 01:01:07.009 [h264 @ 0xb4c70f60]decode_slice_header error
> 2011-03-16 01:01:07.009 [h264 @ 0xb4c70f60]no frame!
> 2011-03-16 01:01:07.394 VDPAU Painter: Clearing VDPAU painter cache.
> 2011-03-16 01:01:07.394 MythPainter: 1 images not yet de-allocated.
> 2011-03-16 01:01:07.502 VDPAU: Created 2 output surfaces.
> 2011-03-16 01:01:07.502 VDPAU: Created VDPAU render device 1920x1080
> 2011-03-16 01:01:08.164 Player(0): Forcing decode extra audio option
> on (Video method requires it).
> 2011-03-16 01:01:08.165 AFD: Opened codec 0xaf4a2930, id(H264) type(Video)
> 2011-03-16 01:01:08.165 AFD: codec AC3 has 2 channels
> 2011-03-16 01:01:08.166 AFD: Opened codec 0xa852cc70, id(AC3) type(Audio)
> 2011-03-16 01:01:08.167 AFD: codec AC3 has 2 channels
> 2011-03-16 01:01:08.168 AFD: Opened codec 0xaf410570, id(AC3) type(Audio)
> 2011-03-16 01:01:08.168 AFD: Opened codec 0xaf4a3d30, id(DVB_SUBTITLE)
> type(Subtitle)
> 2011-03-16 01:01:08.168 AFD: Opened codec 0xa852c7c0, id(DVB_SUBTITLE)
> type(Subtitle)
> 2011-03-16 01:01:08.286 AO: Opening audio device 'both' ch 2(2) sr
> 48000 sf signed 32 bit reenc 0
> 2011-03-16 01:01:08.289 ALSA, Error: Setting hardware audio buffer size to 128
> 2011-03-16 01:01:08.289 ALSA, Error: Error opening
> /proc/asound/card0/pcm3p/sub0/prealloc: Permission denied.
> 2011-03-16 01:01:08.289 ALSA, Error: Try to manually increase audio
> buffer with: echo 128 | sudo tee
> /proc/asound/card0/pcm3p/sub0/prealloc
> 2011-03-16 01:01:08.289 ALSA, Error: Unable to sufficiently increase
> ALSA hardware buffer size - underruns are likely
> 2011-03-16 01:01:08.465 AudioPlayer: Enabling Audio
> 2011-03-16 01:01:08.681 Player(0): Waited 100ms for video buffers
> AAAAAAAAAAAALLLLL
> 2011-03-16 01:01:08.687 Player(0): Waited 100ms for video buffers
> AAAAAAAAAAAALLLLL
> 2011-03-16 01:01:08.704 Player(0): Waited 100ms for video buffers
> AAAAAAAAAAAALLLLL
> 2011-03-16 01:01:08.807 Player(0): Waited 100ms for video buffers
> AAAAAAAAAAAALLLLL
> 2011-03-16 01:01:08.824 Player(0): Waited 100ms for video buffers
> AAAAAAAAAAAALLLLL
> 2011-03-16 01:01:08.830 Player(0): Waited 100ms for video buffers
> AAAAAAAAAAAALLLLL
> 2011-03-16 01:01:08.905 VDPAU: Added 2 output surfaces (total 4, max 4)
> 2011-03-16 01:01:11.716 [h264_vdpau @ 0xb4c70f60]illegal short term
> buffer state detected
>
> There are video and audio buffer problems, I read on other posts that
> the video buffer problem is caused for a high CPU usage. Is there any
> solution for this?

Josu

There is nothing in that portion of your log that indicates any
problem. The video buffer messages are quite normal when starting
playback.

If you want more help, you're going to need to post a link to the full
log output from mythfrontend -v playback and describe in detail the
problems you are having (describe what you are seeing/hearing rather
than what the log output is saying).

regards

Mark