FFmpeg

Mirror of https://git.ffmpeg.org/ffmpeg.git https://ffmpeg.org/

Philip Gladstone 59eb2ed1f3 * Now we do not delete the feed file if it was created with the same parameters as the currently desired codec settings. Thus it is important not to fiddle with the streams if you want to keep the old data. * Fix it so that the ?buffer= paramter can be larger than 40 minutes or so. Why is this good? So I can use ?buffer=43200 and get video from 12 hours ago (i.e. when it is daylight outside) Originally committed as revision 829 to svn://svn.ffmpeg.org/ffmpeg/trunk		23 years ago
doc	Add notes on the ?date= format.	23 years ago
libav	Fix a potential endless loop (nb (1 * 3) / 2 == 1)	23 years ago
libavcodec	dump bits per frame / qp / frame complexity support	23 years ago
postproc	fixing sinc filter (seems the problem was caused by rounding in pmulhw -> solution use shorter filter, its long and slow enough anyway)	23 years ago
tests	use a local dir for tests	23 years ago
.cvsignore	…
COPYING	added license	23 years ago
Changelog	updated	23 years ago
INSTALL	add more info about new configure features	23 years ago
Makefile	build stripped and unstripped ffmpeg - ffserver exports all its symbols for modules - added installlib target for development static libraries installation	23 years ago
README	license/copyright change	23 years ago
VERSION	…
berrno.h	beos/mov/adpcm patch by François Revol <revol at free dot fr>	23 years ago
configure	Add logic to figure out whether strptime is present on the system. If not, then	23 years ago
ffmpeg.c	renamed gettime() av_gettime() - same for register_all()	23 years ago
ffserver.c	* Now we do not delete the feed file if it was created with the same	23 years ago
ffserver.h	added include for ffserver dynamically loaded modules	23 years ago

README

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 EXCEPT
  liba52 are licensed under the Lesser GNU General Public
  License. liba52 is distributed under the GNU General Public License.

* 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 mostly the same.

Fabrice Bellard.