[FFmpeg-user] Dimensions of the input video as a variable

Wolfgang Hugemann auto at hugemann.de
Fri Apr 28 16:27:27 EEST 2017

I would like to superimpose the audiograph of the video's audio on the 
video itself using 'blend'. I sucseeded in doing so with the line:

c:\programme\ffmpeg\bin\ffmpeg -y -i test.avi -filter_complex 
-c:v libxvid -c:a copy ovl.avi

As you see, I supplied the dimensions of the input video (640x480) in 
the command line. I would like to turn this into a more general script, 
determining the dimensions of the input video on the fly, but how do I 
do that?

I tried "s=wxh" and alike, by that doesn't seem to work.


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