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DOCS/tech/codecs.conf.txt: document how to add ffmpeg codecs

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32604 b3059339-0415-0410-9bf9-f77b7e298cf2

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32615 b3059339-0415-0410-9bf9-f77b7e298cf2
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compn 2010-11-08 00:28:28 +00:00 committed by Uoti Urpala
parent cd66de0b8a
commit 13902c2967
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DOCS/tech/codecs.conf.txt
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@ -167,4 +167,44 @@ Apple's "rle " codec).
The "flags" keywords identifies any additional abilities of this
codec. Currently, seekable is the only supported flag.
Adding FFmpeg Codecs
-------------------
example codec:
videocodec ffmdec
info "FFmpeg Sony PlayStation MDEC (Motion DECoder)"
status working
fourcc MDEC ; internal MPlayer FourCC
driver ffmpeg
dll mdec
out YV12
The "videocodec" name should start with ff to differentiate it from other
libraries or binary codecs.
The "dll" name comes from the codec source file or the libavcodec/allcodecs.c
file.
The "out" colorspace can be found in the codec source file in the PIX_FMT
struct. Note that some codecs may have several pix_fmt structs.
The pix_fmt can be converted to the codecs.conf "out" format by reading
the fmt_conversion.c file.
libmpdemux/mp_taglists.c
--------------
Sometimes the lavf demuxer will not pass on a fourcc (mostly video game
formats or other containers that do not support isom/riff tags). You will have
to make one based on the codec_id listed in the codec source file.
Note that it is a good idea to mark any fourcc you create as
' ; internal MPlayer FourCC'. In case another codec uses that fourcc,
you can easily change the internal one. Also this will stop other projects
from thinking of the internal tag as a real fourcc found in the wild.
libmpdemux/demuxer.c
--------------
Some audio codecs require a parser, you can see which ones do
by reading the parsers section in libavcodec/allcodecs.c.
EOF