[Libav-user] ffmpeg showspectrum to file
rhuang.work at gmail.com
Thu May 8 01:30:54 CEST 2014
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
> ./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
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