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a8dbe9514f
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Philip Gladstone a8dbe9514f Change order of extensions and read_probe checking. This gives the read_probe 
a higher priority than extensions. This gives FFM a chance of working. Note
that some of the other probe functions are bit optimistic, and can be
confused by binary data (such as 0x00 0x00 0x01 0xzz) for some values of zz.

This set of changes makes ffserver work again, and fixes the cannot open
video grab device message.

Originally committed as revision 581 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-05-24 02:09:40 +00:00
doc update 2002-05-20 16:22:05 +00:00
libav Change order of extensions and read_probe checking. This gives the read_probe 2002-05-24 02:09:40 +00:00
libavcodec Add an av_abort macro that aborts, but also prints out the location of the abort. 2002-05-24 01:16:08 +00:00
postproc applied 64bit patch from Ulrich Hecht <uli at suse dot de> 2002-05-23 15:40:08 +00:00
tests * cosmetic 2002-05-23 15:58:07 +00:00
.cvsignore * cleanup 2002-04-26 07:18:57 +00:00
bswap.h Fixed one lack 2001-08-02 08:29:52 +00:00
Changelog update 2002-05-18 23:20:40 +00:00
configure BSD/OS support by Steven M Schultz 2002-05-21 15:43:00 +00:00
ffmpeg.c began to simplify code - use modified API for stream reading 2002-05-20 16:32:49 +00:00
ffserver.c * Added yet more output to the status page to try and track down a problem 2002-05-24 02:06:15 +00:00
INSTALL Initial revision 2001-07-22 14:18:56 +00:00
Makefile added libavtest target 2002-05-20 16:34:07 +00:00
mangle.h Cygwin's mangling by Felix Buenemann <atmosfear@users.sourceforge.net> 2002-01-20 14:30:34 +00:00
README merge 2001-07-22 14:37:44 +00:00
VERSION version info for so too 2002-05-09 06:23:37 +00:00

README 

FFmpeg - (c) 2000,2001 Gerard Lantau.

1) Introduction
---------------

ffmpeg is a hyper fast realtime audio/video encoder, a streaming
server and a generic audio and video file converter. 

It can grab from a standard Video4Linux video source and convert it
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 ?

- Innovative streaming technology : multiformat, real time encoding,
  simple configuration.

- Simple and efficient video encoder: outputs MPEG1, H263, Real
  Video(tm), MPEG4, DIVX and MJPEG compatible bitstreams using the
  same encoder core.

- Real time encoding (25 fps in 352x288 on a K6 500) using the
  video4linux API.

- Generates I and P frames, which means it is far better than a MJPEG
  encoder.

- Hyper fast MPEG audio layer 2 compression (50 times faster than
  realtime on a K6 500).

- Hyper fast AC3 compatible encoder.

- simple and very small portable C source code, easy to understand and
  to modify. It be may the smallest decent MPEG encoder :-)

- optional non real time higher quality encoding (different motion
  estimators available).

- Audio and Video decoders are in development.

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.

2) Documentation
----------------

* Read doc/ffmpeg.txt and doc/ffserver.txt to learn the basic features.

* Read doc/TODO to know what are the know bugs and missing features.

* Read doc/README.dev if you want to contribute or use the codec or
  format libraries.

3) Licensing:
------------

* See the file COPYING. ffmpeg and the associated library are licensed
  under the GNU General Public License. I may change the license of
  libavcodec and libav to LGPL if many people ask it (and if they
  submit good patches!).

* This code should be patent free since it is very simple. I took care
  to use the same video encoder/decoder core for all formats to show
  that they really ARE THE SAME except for the encoding huffman codes.

Gerard Lantau (glantau@yahoo.fr).