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Karl Kroening 2017-05-13 19:37:09 -10:00
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README.md
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FFmpeg is extremely powerful, but its command-line interface gets really complicated really quickly - especially when working with signal graphs and doing anything more than trivial. FFmpeg is extremely powerful, but its command-line interface gets really complicated really quickly - especially when working with signal graphs and doing anything more than trivial.
Take for example a signal graph that looks like this: Take for example a signal graph that looks like this:
![Signal graph](https://raw.githubusercontent.com/kkroening/ffmpeg-python/master/doc/graph1.png) ![Signal graph](https://raw.githubusercontent.com/kkroening/ffmpeg-python/master/doc/graph1.png|width=300)
The corresponding command-line arguments are pretty gnarly: The corresponding command-line arguments are pretty gnarly:
``` ```
ffmpeg -i input.mp4 -filter_complex "[0]trim=start_frame=10:end_frame=20,setpts=PTS-STARTPTS[v0];[0]trim=start_frame=30:end_frame=40,setpts=PTS-STARTPTS[v1];[0]trim=start_frame=50:end_frame=60,setpts=PTS-STARTPTS[v2];[v0][v1][v2]concat=n=3[v3]" -map [v3] output.mp4 ffmpeg -i input.mp4 \
-filter_complex "\
[0]trim=start_frame=10:end_frame=20,setpts=PTS-STARTPTS[v0];\
[0]trim=start_frame=30:end_frame=40,setpts=PTS-STARTPTS[v1];\
[0]trim=start_frame=50:end_frame=60,setpts=PTS-STARTPTS[v2];\
[v0][v1][v2]concat=n=3[v3]"\
-map [v3] output.mp4
``` ```
Maybe this looks great to you, but if you haven't worked with FFmpeg before, this probably looks pretty alien. Maybe this looks great to you, but if you haven't worked with FFmpeg before, this probably looks pretty alien.

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