[FFmpeg-user] run ffplay to test sidechaincompression

Carvel Avis swampy1956 at gmail.com
Sat Jul 28 17:52:30 EEST 2018

Is ffplay limited to 1 input? If so, how do you test sidechaincompression,
for example, using audio stream from a video to compress an audio file?

Using ffmpeg, I am running something like this:

ffmpeg -i render-0.wav -i temp.mp4 -y -filter_complex \
[compr][mix]amerge[a]" -map 1:v -map [a] -c:v copy -b:a 128k test2.mp4

If I try running the above using ffplay, I get an error that the input,
render-0.wav has already been specified...

Argument 'temp.mp4' provided as input filename, but 'render-0.wav' was
already specified.

I've been using ffmpeg for some time now but just getting started playing
with ffplay.


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