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bigdawggi/ffmpeg cheatsheet.mdown

Last active January 20, 2017 08:28
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Quick cheatsheet for ffmpeg
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ffmpeg cheatsheet.mdown

Movie Conversions with ffmpeg

NOTE About Vimeo: Looks like they want 5M for bitrate - I think that'll mean, just switching the 2M to 5M in the commands below.

This video’s bit rate is only 1984 kbit/s, which is lower than what we recommend for H.264 video. Your video might not look as nice as it should. For 1280x720 video, we recommend a data rate of at least 5000 kbit/s. Learn more about our recommended compression settings.

Convert iMovie mp4 to webm

No audio...remove "-an" if you want audio

ffmpeg -i dm-720p.30sec.mp4 -c:v libvpx -minrate 2M -maxrate 2M -b:v 2M -an dm-720p.webm

Compress iMovie mp4 to an "optimized mp4"

No audio...remove "-an" if you want audio

ffmpeg -i dm-720p.30sec.mp4 -minrate 2M -maxrate 2M -b:v 2M -an dm-720p.optimized.mp4

Links

Speeding up (<1) and slowing down (>1) video

https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20video

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