Can anyone kindly give me a usage example of this:
ffmeg -i SOURCE -vf decimate=ppsrc TARGET
I'm totally dumbfounded by this:
"ppsrc
Mark main input as a pre-processed input and activate clean source input stream. This allows
the input to be pre-processed with various filters to help the metrics calculation while keeping the
frame selection lossless. When set to 1, the first stream is for the pre-processed input, and the
second stream is the clean source from where the kept frames are chosen. Default is 0."
Specifically:
"the first stream is for the pre-processed input": What is a pre-processed
input? How processed?
"the second stream": What 2nd stream? Are there 2 inputs? If so, does that mean I need to use a
filter complex? Or are there 2 passes? If so, how do I form the command line?
"clean source": What is a clean source? How is it made clean (whatever that
means)?
Thanks for your help.
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