[MEncoder-users] a-v synchronization problems of some NTSC DVDs with -oac copy

[David Soukal]

Corey Hickey wrote:
> David Soukal wrote:
> 
> 
>>If there's anything I could do to help localize the problem, let me know.
>>
> 
> 
> It would be nice if you could post a section of the movie on some public
> server so we could try it out.
> 
> 1. Pick a DVD that gives you desync problems early on.
> 
> 2. Run 'mplayer dvd://1 -dumpstream'. You can ctrl-c mplayer once it's
> dumped a little past where you start getting problems
> 
> 3. Use the dd command to refine it further, like this:
> $ dd if=stream.dump of=firstpart.dump bs=1M count=100
> Adjust the count value to as small as you can while still including the
> problematic part.
> 
> 4. Encode firstpart.vob to make sure you still have trouble.
> 
> 5. At this point firstpart.vob will still be pretty big. See if you can
> remove some of the beginning, like this:
> $ dd if=firstpart.dump of=small.dump bs=1M skip=50
> 
> 6. Use trial and error to find the biggest skip value you can where you
> still have trouble with small.dump.
> 
> 7. Put the file on some http/ftp server and report the URL to us.
> 
> -Corey
> 

I'll do that! But before I do, does the fact that the movie compressed
with libav codec seems desync-free help??

This is all very strange to me, but hopefully not to you guys :)

Thank you for your help!!

David