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FFmpeg: Difference between revisions
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* <tt>--enable-gpl</tt> forces creation of GPL-only modules (including e.g. <i>delogo</i>). the resulting object is GPL-licensed. | * <tt>--enable-gpl</tt> forces creation of GPL-only modules (including e.g. <i>delogo</i>). the resulting object is GPL-licensed. | ||
* <tt>--enable-nvenc</tt> forces use of [https://en.wikipedia.org/wiki/Nvidia_NVENC NVENC] (requires [https://github.com/FFmpeg/nv-codec-headers nv-codec-headers]) | * <tt>--enable-nvenc</tt> forces use of [https://en.wikipedia.org/wiki/Nvidia_NVENC NVENC] (requires [https://github.com/FFmpeg/nv-codec-headers nv-codec-headers]) | ||
==Recipes== | |||
===Remove audio=== | |||
<tt>ffmpeg -i INPUT -vcodec copy -an OUTPUT</tt> | |||
===Extract N seconds starting at time T=== | |||
<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. | |||
===Combine input files=== | |||
<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 ".
