[MEncoder-users] differences in divx2pass.log between -oac copy and mp3lame

[John Suzuki]

Rich Felker wrote:

>On Sat, Sep 03, 2005 at 03:32:08PM +0200, John Suzuki wrote:
>  
>
>>Between:
>>  $ mencoder -ovc lavc -lavcopts vpass=1 -oac copy ...
>>and
>>  $ mencoder -ovc lavc -lavcopts vpass=1 -oac mp3lame ...
>>the generated divx2pass.log files are different.
>>I am curious as to why, since the log file depends on the video part,
>>not the audio part, of the input, right?
>>    
>>
>
>This is due to a bug in mencoder's a/v sync, especially with lame. You
>must use the same audio options for both passes. I would recommend
>using -oac copy for both passes, then using -ovc copy -mc 0 -noskip
>-oac mp3lame to reencode audio separately afterwards. Or demux the
>audio and encode it separately with external lame, then remux. Or..
>there are many other ways. The dumb, slow, but easy way is just to
>encode audio twice with -oac mp3lame on both passes.
>  
>
Thanks everybody for your replies.
I tested with -mc 0 added and it seems to remove the problem.
But are there any disadvantages using -mc 0 in all passes?