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

[JULIAN GARDNER]

----- Original Message -----
> From: Carl Eugen Hoyos <cehoyos at ag.or.at>
> To: ffmpeg-user at ffmpeg.org
> Cc: 
> Sent: Wednesday, 16 January 2013, 11:41
> Subject: Re: [FFmpeg-user] confusion with "-vsync 1" / "-vsync cfr" and "-map" (to sync audio to video)
> 
>t racey 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.
> 

I dont know if you remember but this is the same problem i brought up. 

Channel4 in the UK goes from 5.1 to stereo for commercials, now if i have "-async 1" as a parameter all hell breaks loose and audio goes, if i remove "-aysnc 1" then i get lipsync errors.

I can get a recording for you if you would like one

joolz