On 03/16/2020 04:37 PM, Carl Zwanzig wrote:
On 3/16/2020 6:24 AM, Gyan Doshi wrote:
-filter_complex is a global option, so parsed first, then input files, then the
complex filtergraphs are set up, then output files.
Is there any reason, then, not to always put -filter_complex as the first
parameters of the command line? The Synopsis line in the docs shows global
options first but most of the doc examples don't.
Example-
ffmpeg -i video.mkv -i image.png -filter_complex '[0:v][1:v]overlay[out]' -map
'[out]' out.mkv"
Or is there another reason for listing inputs, then -filter_complex, then
outputs?
I've been told several times by several gurus that filters, including
filter_complex, are output specific must be specified directly before the
output to which they apply, and. for processes that have multiple outputs, can
be differently for each output.
HTH,
Mark.
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