[mythtv-users] MPEG2 -> MPEG2 Transcoding

[Michael T. Dean]

On 03/28/2006 04:54 PM, Steven Adeff wrote:

>I've "lossless" transcode commercial cuts to many shows (100+) for
>both ATSC and PVR-150 MPEG2 recordings and have not once seen an audio
>sync issue occur. I can with fairly good certainty say that all else
>being equal no audio sync error should occur.
>
>If you ever do see a sync issue, send an email to the Dev list, I
>forget the fellows name who coded the MPEG2->MPEG2 transcoding,
>

Geoffrey Hausheer

> but
>he'll ask for some more information and a sample to figure out the
>problem. I know he fixed quite a few bugs for me and others while 0.19
>was still in SVN.
>

Right, and that's the most important part.  One of the primary reasons 
Geoffrey created the new lossless transcoder in Myth 0.19 was to allow 
simple commercial clipping without introducing A/V sync errors, since 
other available MPEG-2 tools did not properly handle issues in the 
PVR-x50 recordings.

So, basically, what the OP heard about cutting MPEG-2 applies to other 
tools, but Myth's lossless transcoder was created because of the 
problems those other tools had, so you shouldn't experience any A/V sync 
issues when using it.

Mike