[mythtv-users] HD 720p Audio/Video sync problem - some times

[MythTV]

DaveD wrote:
> I am having trouble with A/V sync on some HD shows recorded from our PBS 
> channel.  It is the only channel I get that broadcasts 720p.  Some shows 
> have the problem, some do not.  What happens is the video continuously 
> races ahead of the sound and Myth constantly adjusts, some times slowing 
> the video, some times speeding up (and dropping parts of) the sound.  
> It's very unwatchable.
>
> Good news is I can watch the recordings with Xine or Mplayer.  Both work 
> fine.  Myth works fine on all other HD recordings (all other HD channels 
> are 1080i).  All SD works fine.
>   

I posted yesterday about a similar problem I am having as well.

I recorded a show last night that would exhibit the problem.

It is a SD Digital show. 

Mplayer can play it without any problem ( 7% cpu ) but mythtv stutters 
continuously and is unwatchable.

I tried all of the predefined playback profiles and non of them made any 
difference.
 

Mythtv:
2007-12-11 10:04:53.104 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2007-12-11 10:04:53.170 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2007-12-11 10:04:53.171 NVP: Video is 30 frames behind audio (too slow), 
droppin
g frame to catch up.
2007-12-11 10:04:53.171 NVP: Video is 30 frames behind audio (too slow), 
droppin
g frame to catch up.
2007-12-11 10:04:53.171 NVP: Video is 30 frames behind audio (too slow), 
droppin
g frame to catch up.
2007-12-11 10:04:53.171 NVP: Video is 30 frames behind audio (too slow), 
droppin
g frame to catch up.
2007-12-11 10:04:53.171 NVP: Video is 30 frames behind audio (too slow), 
droppin
g frame to catch up.
2007-12-11 10:04:53.171 NVP: Video is 30 frames behind audio (too slow), 
droppin
g frame to catch up.
2007-12-11 10:04:53.254 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2007-12-11 10:04:53.297 NVP: Changing speed to 0

Mplayer:
TS file format detected.
VIDEO MPEG2(pid=99) AUDIO A52(pid=100) NO SUBS (yet)!  PROGRAM N. 1
VIDEO:  MPEG2  528x480  (aspect 2)  29.970 fps  15000.0 kbps (1875.0 
kbyte/s)
[VO_XV] Could not grab port 355.
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 528 x 480 (preferred colorspace: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
Try appending the scale filter to your filter list,
e.g. -vf spp,scale instead of -vf spp.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2))
==========================================================================
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 528 x 480 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
VO: [xv] 528x480 => 640x480 Planar YV12