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In a Windows batch file, is it possible to define a constant when using a filter or when chaining filters? E.g. to pad a video with 15 pixels, I can use:

  • -filter_complex "[0:v:0] pad= iw+30 : ih+30 : 15 : 15 : cyan [pv]"

Is it possible to define `p=15` somewhere in order to use the more flexible filter:

  • -filter_complex "[0:v:0] pad= iw+2*p : ih+2*p : p : p : cyan [pv]"
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1 Reply 1

Dai
•

Only as an environment-variable:

SET p=15

ffmpeg etc -filter_complex "[0:v:0] pad= iw+(2*%p%) : ih+(2*%p%) : %p% : %p% : cyan [pv]"

...not exactly easier to read, though.

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