[FFmpeg-user] multiple inputs

Carl Eugen Hoyos ceffmpeg at gmail.com
Fri Feb 9 03:24:34 EET 2018

2018-02-08 11:52 GMT+01:00 Mikael Persson <mikael.persson at liu.se>:
> Hi, I want to sequentially parse a set of input videos and output all their
> keyframes in monotonic unbroken order...
> so videos a,b,c,d with 10 frames each should produce 0-50.jpg
> If thye videos where concatable and the concat process lossless I could do
> ffmpeg -f concat -i vids.txt concat.vid
> and then
> ffmpeg  vsync -skip_frame nokey -i concat.vid %06d.jpg
> But they arent, and it isnt...
> tips?

There is also a concat filter.

Carl Eugen

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