On Wed, 7 May 2014 11:44:26 -0700 Ricky Huang <[email protected]> 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. AFAIK -vf is for video-to-video filters only. You either need a "complex" graph, or you use the lavfi thing as input like you did with ffplay. > > Thanks in advance! > _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
