FFmpeg: Difference between revisions
Created page with "Best by test. The original quasi-legal, hyperbroad, coldly efficient library for decoding, encoding, and munging digital media. ==Build options== * <tt>--enable-gpl</tt> forc..." |
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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>". | |||