[MEncoder-users] Problem re-encoding matroska xvid+ac3 file

[Phil Oleynik]

Maciej J. Woloszyk wrote:

>On Thursday 26 of May 2005 16:37, Oleynik Phil wrote:
>  
>
>>I know your problem. I had it in the same way, with AAC sound. I solved
>>it in my special way,
>>I have an opinion that 5.1 is a little insane thing, because probably,
>>nobody has 5+1 ears ;).
>>    
>>
>
>Well... Maybe not ears, but I do have 5.1 sound system ;)
>Anyway - I keep my divx's with stereo sound so the method looked interesting.
>
>  
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>>So I am going to advice to downmix to stereo. You may try not to do it,
>>maybe it'll work also for 5.1.
>>
>>1. Extract PCM WAV from mkv file with mplayer.
>>    
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>ok.
>
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>>2. Encode it with anything you wish, I used OGG
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>I use mp3 so I encoded with lame
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>>3. Put it to the original matroska with --disable-lacing key.
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>Do you mean I should do mkvmerge taking all streams from the original mkv and 
>my additional audio stream and create intermediate mkv file?
>
>  
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>>4. remix matroska without original sound, keeping your OGG stream with
>>--disable-lacing key.
>>    
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>...and then take the intermediate file and using mkvmerge create yet another 
>mkv file with only video and new audio file?
>  
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Then take this intermediate file, and repack it to matroska excluding 
buggy ac3 track.
Do not forget to add --disable-lacing! I looked now at my script, I used 
also --no-tags.
Maybe it means something, maybe not.

>  
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>>5. Feed it to mencoder, as usual.
>>
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>If the answer to both my questeions is "yes" then I did it and unfortunatelly 
>it didn't helped - fimal mkv file is fine (no desync) but after I put it 
>through mencoder to create final avi I get the same desync as without the 
>whole procedure.
>
>M.
>
>  
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The last and ultimate one. use mkvtoolnix 1.4 or above, with 1.0.* you 
won't get a result.
I tried to do it with 1.0.2 (and not only this, I spent many hours 
trying to resolve a problem),
and did not succeeded at ALL. I even asked its author.

Go to http://www.bunkus.org/videotools/mkvtoolnix/downloads.html to get 
newest version.

Philipp