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README
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README
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1) Introduction
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FFmpeg README
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---------------
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-------------
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ffmpeg is a hyper fast realtime audio/video encoder, a streaming
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1) Documentation
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server and a generic audio and video file converter.
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It can grab from a standard Video4Linux video source and convert it
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into several file formats based on DCT/motion compensation
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encoding. Sound is compressed in MPEG audio layer 2 or using an AC3
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compatible stream.
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What makes ffmpeg interesting ?
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- Innovative streaming technology : multiformat, real time encoding,
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simple configuration.
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- Simple and efficient video encoder: outputs MPEG1, H263, Real
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Video(tm), MPEG4, DIVX and MJPEG compatible bitstreams using the
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same encoder core.
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- Real time encoding (25 fps in 352x288 on a K6 500) using the
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video4linux API.
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- Generates I and P frames, which means it is far better than a MJPEG
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encoder.
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- Hyper fast MPEG audio layer 2 compression (50 times faster than
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realtime on a K6 500).
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- Hyper fast AC3 compatible encoder.
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- simple and very small portable C source code, easy to understand and
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to modify. It be may the smallest decent MPEG encoder :-)
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- optional non real time higher quality encoding (different motion
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estimators available).
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- Audio and Video decoders are in development.
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ffmpeg is made of two programs:
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* ffmpeg: soft VCR which encodes in real time to several formats. It
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can also encode from any supported input file format to any input
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supported format.
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* ffserver: high performance live broadcast streaming server based on
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the ffmpeg core encoders.
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2) Documentation
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----------------
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----------------
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* Read doc/ffmpeg.txt and doc/ffserver.txt to learn the basic features.
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* Read the documentation in the doc/ directory.
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* Read doc/TODO to know what are the know bugs and missing features.
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2) Licensing
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* Read doc/README.dev if you want to contribute or use the codec or
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format libraries.
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3) Licensing:
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------------
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------------
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* See the file COPYING. ffmpeg and the associated library EXCEPT
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* Read the file COPYING. ffmpeg and the associated libraries EXCEPT
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liba52 are licensed under the Lesser GNU General Public
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liba52 are licensed under the Lesser GNU General Public
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License. liba52 is distributed under the GNU General Public License.
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License. liba52 is distributed under the GNU General Public License.
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* This code should be patent free since it is very simple. I took care
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to use the same video encoder/decoder core for all formats to show
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that they really are mostly the same.
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Fabrice Bellard.
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Fabrice Bellard.
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@ -645,6 +645,9 @@ library.
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</TR>
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</TR>
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<TR><TD>DV </TD><TD> </TD><TD> X</TD>
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<TR><TD>DV </TD><TD> </TD><TD> X</TD>
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</TR>
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<TR><TD>Huff YUV </TD><TD> X </TD><TD> X</TD>
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</TR></TABLE>
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</TR></TABLE>
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<P>
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<P>
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@ -680,6 +683,9 @@ solutions.
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<TR><TD>Vorbis </TD><TD> X </TD><TD></TD>
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<TR><TD>Vorbis </TD><TD> X </TD><TD></TD>
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</TD><TD> encoding is supported thru the external library libvorbis.
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</TD><TD> encoding is supported thru the external library libvorbis.
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</TR>
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<TR><TD>WMA V1/V2 </TD><TD> </TD><TD> X</TD>
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</TR></TABLE>
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</TR></TABLE>
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<P>
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<P>
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@ -362,7 +362,7 @@ library.
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@multitable @columnfractions .4 .1 .1 .7
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@multitable @columnfractions .4 .1 .1 .7
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@item Supported Codec @tab Encoding @tab Decoding @tab Comments
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@item Supported Codec @tab Encoding @tab Decoding @tab Comments
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@item MPEG1 video @tab X @tab X
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@item MPEG1 video @tab X @tab X
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@item MPEG2 video @tab @tab X
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@item MPEG2 video @tab @tab X
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@item MPEG4 @tab X @tab X @tab Also known as DIVX4/5
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@item MPEG4 @tab X @tab X @tab Also known as DIVX4/5
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@item MSMPEG4 V1 @tab X @tab X
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@item MSMPEG4 V1 @tab X @tab X
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@ -372,6 +372,7 @@ library.
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@item H263(+) @tab X @tab X @tab Also known as Real Video 1.0
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@item H263(+) @tab X @tab X @tab Also known as Real Video 1.0
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@item MJPEG @tab X @tab X
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@item MJPEG @tab X @tab X
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@item DV @tab @tab X
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@item DV @tab @tab X
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@item Huff YUV @tab X @tab X
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@end multitable
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@end multitable
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@code{X} means that the encoding (resp. decoding) is supported.
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@code{X} means that the encoding (resp. decoding) is supported.
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@ -391,6 +392,8 @@ solutions.
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@tab liba52 is used internally for decoding.
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@tab liba52 is used internally for decoding.
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@item Vorbis @tab X @tab
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@item Vorbis @tab X @tab
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@tab encoding is supported thru the external library libvorbis.
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@tab encoding is supported thru the external library libvorbis.
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@item WMA V1/V2 @tab @tab X
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@end multitable
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@end multitable
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@code{X} means that the encoding (resp. decoding) is supported.
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@code{X} means that the encoding (resp. decoding) is supported.
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