[FFmpeg-user] Help: transform 'asyncts=first_pts=0' into new 'aresample' filter

Stefano Sabatini stefasab at gmail.com
Wed Jan 30 01:09:26 CET 2013

On date Sunday 2013-01-27 19:35:48 +0100, Frank Häfemeier wrote:
> Am Sonntag, den 27.01.2013, 09:53 +0000 schrieb Carl Eugen Hoyos:
> > Frank Häfemeier <ffmpeg <at> frank.haefemeier.eu> writes:
> > 
> > > The conclusion is, I need more tests, how to configure 
> > > the filter to get the correct result for my issues.
> > 
> > Sorry if I missed (or forgot) an email, but 
> > did you explain the "issues"?
> Not in detail (because I did not research too deeply). I have in some
> cases synchronize issue between video and audio. Mainly audio has a
> delay and starts too late. With the asyncts filter option 'first_pts=0'
> video and audio are in sync after conversion.
> If I understand the mail from Steffano right, I need a more precisely
> knowledge and configuration of the new filter to get the same result.
> I will try his hints (and investigate more time to get a deeper
> knowledge) and see if it is working.

Michael recently added a first_pts option to aresample which should
have the same behavior as asyncts, please check it out and
report. Related documentation is in ffmpeg-resampler(1), documentation
suggestions and patches are welcome.
FFmpeg = Fantastic and Freak Mortal Problematic Elected Guru

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