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[ excerpt (with adaptations) from developer's README ]
ffmpeg is a hyper fast realtime audio/video encoder, a streaming
server and a generic audio and video file converter.
It can convert a standard video source into several file formats
based on DCT/motion compensation encoding. Sound is compressed in
MPEG audio layer 2 or using an AC3 compatible stream.
What makes ffmpeg interesting ?
- Simple and efficient video encoder: outputs MPEG1, H263, Real
Video(tm), MPEG4, DIVX and MJPEG compatible bitstreams using the
same encoder core.
- Hyper fast MPEG audio layer 2 compression (50 times faster than
realtime on a K6 500).
[snip -> rest on website below]
ffmpeg is made of two programs:
* ffmpeg: soft VCR which encodes in real time to several formats.
It can also encode from any supported input file format to any
input supported format.
* ffserver: high performance live broadcast streaming server based
on the ffmpeg core encoders.
WWW: http://ffmpeg.sourceforge.net/
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