[FFmpeg-user] confusion with "-vsync 1" / "-vsync cfr" and "-map" (to sync audio to video)

Tracey Jaquith tracey at archive.org
Wed Jan 16 16:24:38 CET 2013

On Jan 16, 2013, at 2:41 AM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> tracey jaquith <tracey <at> archive.org> writes:
>> OK, i've got a 24MB MPEG-TS sample of this. 
>> Before I reply w/ the long console output,
>> can you just quick glance over my lines here 
>> so that you end up with a sample/report that 
>> you are expecting?
> Well, I was expecting that you point me to a 
> sample that drops "down to stereo and lower 
> quality local affiliate commercials for us)" 
> including a (minimal) command line that allows 
> to reproduce the problem.

well, perfect!  that's exactly what I have there.  I'll figure out how to post it (it's actually 75MB) and it nicely shows the problem.  

(And similar to the reply about a UK channel...  This issue repeated many times for us -- that's how I found it -- a huge amount of our programming for a certain HD channel (US) broke midway through the show and it took me a long time to sort out that it was happening at very specific points -- these audio change points).


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