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

Frank Häfemeier ffmpeg at frank.haefemeier.eu
Wed Jan 30 01:24:22 CET 2013


Am Mittwoch, den 30.01.2013, 01:09 +0100 schrieb Stefano Sabatini:
> 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.

Sounds good. I will test it in next days and give you a feedback as soon
as possible.

Thanks
	Frank




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