[MPlayer-users] Audio out of sync

[Nico Sabbi]

Michael Lindner wrote:

> I'm trying to backup tivo video to DVD. I have a utility that extracts 
> a .mpg file from the tivo file. The resulting .mpg file plays 
> perfectly with mplayer.
>
> However, when converting to DVD, the result has audio that starts out 
> in sync, but as time progresses gradually gets out of sync with the 
> video. I am using the script encode2mpeg to make the dvd, but the 
> result is the same no matter what tools I've tried. At any rate, 
> encode2mpeg demuxes the audio and video using the command
>
> mplayer XXX.mpg -noframedrop -v -osdlevel 0 -vo 
> yuv4mpeg:file=/dev/fd/4 -ao pcm:waveheader:fast:file=%10%XXX.wav


why yuv4mpeg? if the final file will have to be mpeg why don't you use 
-of mpeg ... -ovc copy or -ovc  lavc?

>
> so I'm asking my question in this forum. It seems that the original 
> mpg file has *mostly* frames at 29.970fps. However, a few of the 
> frames are not, as shown below. I'm told this is the reason for the 
> sync slipping:
>
> A: 189.7 V: 189.2 A-V:  0.476 ct:  0.284 5642/5624  2% 43%  0.3% 5073 0
> demux_mpg: 24000/1001fps progressive NTSC content detected, switching 
> framerate.
> A: 190.0 V: 189.5 A-V:  0.550 ct:  0.303 5650/5631  2% 43%  0.3% 5079 0
> demux_mpg: 30000/1001fps NTSC content detected, switching framerate.
> Warning! FPS changed 23.976 -> 29.970  (-5.994005) [4]  3%  0.3% 5080 0


mencoder doesn't deal well with variable framerate content

>
> I was wondering if there's a way to fix this so the streams will be in 
> sync. There are quite a few Windows programs that do this, but they 
> are Windows programs and I am running Linux. I figure mplayer does 
> just about everything, there must be an option that can do it that I'm 
> missing...
>
> Thanks in advance for any help.