[Libav-user] ffmpeg showspectrum to file

[Ricky Huang]

On May 7, 2014, at 3:29 PM, Clément Bœsch <u at pkh.me> wrote:

> On Wed, May 07, 2014 at 11:44:26AM -0700, Ricky Huang wrote:
>> Hello all,
>> 
>> I am experimenting to the showspectrum filter.  According to the example at http://www.ffmpeg.org/ffmpeg-filters.html#Examples-11:
>> 
>>> ffplay -f lavfi 'amovie=input.mp3, asplit [a][out1]; [a] showspectrum=mode=separate:color=intensity:slide=1:scale=cbrt [out0]'
>> 
>> but I cannot figure out how to output the showspectrum result to a saved video with ffmpeg command.  When I adopt the ffplay command to ffmpeg:
>> 
>>> ./ffmpeg -i Q-full-circle.mp3 -vf showspectrum=mode=separate:color=intensity:slide=1:scale=cbrt -y full-circle.avi
>> 
>> 
>> the command executes without error, the video file gets generated, but no video is produced.
>> 
> 
> ./ffmpeg -f lavfi -i amovie=Q-full-circle.mp3,showspectrum=mode=separate:color=intensity:slide=1:scale=cbrt -y full-circle.avi
> 
> or
> 
> ./ffmpeg -i Q-full-circle.mp3 -filter_complex showspectrum=mode=separate:color=intensity:slide=1:scale=cbrt -y full-circle.avi

Exactly what I was looking for.  Thank you Clement!


> -- 
> Clément B.
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://ffmpeg.org/pipermail/libav-user/attachments/20140507/5984294d/attachment.html>