Editing Openai/6957d2e8-b738-8008-987a-09a5d9f29bc8 (section)

==== With -ss after -i (like above), -to is treated as an end timestamp in the input timeline (works well for human timestamps). ====

If you ever prefer “duration”, use -t instead:

<syntaxhighlight lang="bash"># from 01:02 for 71 seconds
ffmpeg -i input.mp4 -ss 00:01:02.000 -t 00:01:11.000 ...

</syntaxhighlight>

==== <syntaxhighlight lang="bash">in="input.mp4" ====

ffmpeg -i "$in" -ss 00:01:02.000 -to 00:02:13.000 -c:v libx264 -crf 20 -preset medium -c:a aac -b:a 160k -movflags +faststart clip_01.mp4
ffmpeg -i "$in" -ss 00:03:17.000 -to 00:05:26.000 -c:v libx264 -crf 20 -preset medium -c:a aac -b:a 160k -movflags +faststart clip_02.mp4
ffmpeg -i "$in" -ss 00:09:21.000 -to 00:09:28.000 -c:v libx264 -crf 20 -preset medium -c:a aac -b:a 160k -movflags +faststart clip_03.mp4
ffmpeg -i "$in" -ss 00:09:44.000 -to 00:10:04.000 -c:v libx264 -crf 20 -preset medium -c:a aac -b:a 160k -movflags +faststart clip_04.mp4

</syntaxhighlight>

If you tell me your input codecs (paste ffprobe -hide_banner -i input.mp4), I can adjust settings to either keep the same FPS/resolution, preserve 5.1 audio, or speed it up with hardware encoding (NVENC/QSV/VAAPI).