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FFmpeg: Difference between revisions
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===Extract N seconds starting at time T=== | ===Extract N seconds starting at time T=== | ||
<tt>ffmpeg -i INPUT -c copy -ss T -t N OUTPUT</tt> | <tt>ffmpeg -i INPUT -c copy -ss T -t N OUTPUT</tt> | ||
T can be either a seconds count, or a timestamp i.e. 01:00:20. | * T can be either a seconds count, or a timestamp i.e. 01:00:20. | ||
===Combine input files=== | ===Combine input files=== | ||
<tt>ffmpeg -f concat -safe 0 -i | <tt>ffmpeg -f concat -safe 0 -i INPUT -c copy OUTPUT</tt> | ||
* INPUT ought be a newline-delimited set of files, each prefaced with "<tt>file </tt>". | |||
Latest revision as of 09:40, 30 May 2022
Best by test. The original quasi-legal, hyperbroad, coldly efficient library for decoding, encoding, and munging digital media.
Build options
- --enable-gpl forces creation of GPL-only modules (including e.g. delogo). the resulting object is GPL-licensed.
- --enable-nvenc forces use of NVENC (requires nv-codec-headers)
Recipes
Remove audio
ffmpeg -i INPUT -vcodec copy -an OUTPUT
Extract N seconds starting at time T
ffmpeg -i INPUT -c copy -ss T -t N OUTPUT
- T can be either a seconds count, or a timestamp i.e. 01:00:20.
Combine input files
ffmpeg -f concat -safe 0 -i INPUT -c copy OUTPUT
- INPUT ought be a newline-delimited set of files, each prefaced with "file ".
