[FFmpeg-user] Assumefps() equivalent in FFMPEG

[Eugene Gekhter]

Thanks Reuben and Simon, I will give it a shot.

Best regards,


*Eugene Gekhter* / CEO

(847) 272-8207/ egekhter at pixcel.com
*Pixcel* Office: (800) 557-3508
3336 Commercial Ave. / Northbrook, IL 60062
http://www.pixcel.com






On Wed, Jul 30, 2014 at 8:18 AM, Simon Thelen <ffmpeg-user at c-14.de> wrote:

> On 30/07/14 at 08:13, Reuben Martin wrote:
> > On Wednesday, July 30, 2014 07:02:49 AM Eugene Gekhter wrote:
> > > In my avisynth workflow, I stretch the audio to 36% of its original
> rate to
> > > get it to play at the right speed and with perfect sync with the video,
> > > something like video.*assumefps(*18*)*.*TimeStretch(*rate=36*).*
> > In ffmpeg you would normally use a filter called "atempo".  However,
> this much
> > stretching is beyond the range on what it can handle. (it's range is 0.5
> -
> > 2.0)
> You can always use  2 atempo filters, one at 0.5 and another at 0.72,
> that should slow it down to 36% of the original rate.
> (assuming my math is correct)
>
> --
> Simon Thelen
> A rolling stone gathers momentum.
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