[mythtv-users] transcoding using mencoder

[Jason Radford]

On Tue, 17 Jun 2003 03:22:47 -0400
Craig Longman <craigl at begeek.com> wrote:

Hi craig,


> >
> i think so.  the mpeg-2 files i've been encoding, and other people have 
> reported similar problems with mpeg-4 i think, seem to put the audio 
> 10-12 frames after the relevant video frame (as in codec frame).  this 
> means that if you don't pay attention to the timestamp, you will get 
> audio 10-12 frames too soon, 1/3-1/2 a second.

Yes, exactly what seems to be happening to my transcoded files.

> i had thought that mythmkmovie handled this by fudging in some black 
> frames when processing cutlists, but maybe there's a problem with that. 
>  i've fixed up ReencodeFile() to resync the audio and video more 
> closely, as well as handle some other audio problems when actual 
> conversion is taking place, but need to clean it up a bit and deal with 
> non-conversion cases before submitting it.  
> 
> this might be same problem here, it sounds suspicious.

Ok, if you need a *.nuv mpeg4 samples or a ginea pig let me know, I have
the
machines and time in the evenings, would be happy to help you
test things out...

-jason