[MPlayer-users] Different Video Length depending on the audio chosen

[Nico Sabbi]

Il giorno sab, 22/11/2008 alle 16.12 +0200, Khelben Blackstaff ha
scritto:
> > the only reliable length is the one of the wav files; for some reason
> > mencoder doesn't seem to  decode the whole dts stream
> 
> I noticed something that makes the issue more weird.
> 
> At first i thought that mplayer -dumpaudio produces the wrong stream,
> but i ran dcadec on it and the stream is correct, so mplayer too doesn't
> decode it correctly under some circumstances.
> 
> To sum all the info in one:
> 
> 1) mplayer dvd://1 -aid 137    -> decodes DTS fine (length 6078)
> 
> 2) mplayer dvd://1 -aid 137 -identify -frames 0 -> shows 6078 length
> which is correct.
>  
> 3) mplayer dvd://1 -aid 137 -novideo -ao pcm  -> decodes DTS fine
> to a wav of 6078 length.
> 
> 4) mencoder dvd://1 -aid 137 -oac copy -ovc (copy/h264/whatever) ->
> produces a avi which has smaller length (5971) and shows in the screen
> "Skipping Frame!" every 2-2.5 seconds.

skipping frames shortens the overall duration (but it should skip
video frames, so audio should be left intact... )

> 
> 5) mplayer dvd://1 -aid 137 -dumpaudio -> produces the correct stream
> but if i run "mplayer -identify -frames 0 stream.dump" it shows the
> wrong length of 5971.


it's an unreliable method

> 
> So the problem lies not only with mencoder but with mplayer too.
> 
> I tried 3 DVDs with DTS audio so it isn't some fault of the DVD.
> My prog versions are the following:
> 
> libdca SVN version (also tried version 0.0.5 before that)
> also tried -ac ffdca to use ffmpeg instead of libdca but same result.
> mplayer svn as of yesterday (revision 27975)
> 
> I am glad to provide any more info or test any patch.
> 
> I am sorry for my long post and thank you for your time.