mirror of https://git.ffmpeg.org/ffmpeg.git
update
Originally committed as revision 589 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -27,20 +27,23 @@ Video:
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vectors. Currently, only fcode = 1 is used for both H263/MPEG1. Half
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pel vectors are used.
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I also plan to improve the bitrate control which is too simplistic.
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Audio:
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-----
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- I rewrote the mpeg audio layer 2 compatible encoder from scratch. It
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is one of the simplest encoder you can imagine (800 lines of C code
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!). It is also one of the fastest because of its simplicity. There
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are still some problems of overflow. A minimal psycho acoustic model
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could be added. Currently, stereo is supported, but not joint
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stereo.
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- The mpeg audio layer 2 compatible encoder was rewritten from
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scratch. It is one of the simplest encoder you can imagine (800
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lines of C code !). It is also one of the fastest because of its
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simplicity. There are still some problems of overflow. A minimal
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psycho acoustic model could be added. Currently, stereo is
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supported, but not joint stereo.
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- I rewrote the AC3 audio encoder from scratch. It is fairly naive,
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but the result are quiet interesting at 64 kbit/s. It includes
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extensions for low sampling rates used in some Internet
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- The AC3 audio encoder was rewritten from scratch. It is fairly
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naive, but the result are quiet interesting at 64 kbit/s. It
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includes extensions for low sampling rates used in some Internet
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formats. Differential and coupled stereo is not handled. Stereo
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channels are simply handled as two mono channels.
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- The mpeg audio layer 3 decoder was rewritten from scratch. It uses
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only integers and can be 16 bit precision for the synthesis filter
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at the expense of a slight precision loss. A slower bit exact mode
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is available too for compliance testing.
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28
doc/TODO
28
doc/TODO
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@ -3,26 +3,16 @@ ffmpeg TODO list:
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(in approximate decreasing priority order)
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Short term glantau's fixes:
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- regression tests (done).
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- mpeg1/2 decode fix (unfortunately not much speed increase) (done)
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- fix WORDS_BIGENDIAN issue (done)
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- remove win project files (done)
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- remove sub_xxx functions (done)
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- mpeg2 transport stream support (decoding done)
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- improved auto guess for formats (api change again in demux) (done)
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- fix mpeg format tracking + handle frame rate change (done)
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- suppress strlcpy (done)
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- split mux/demux functions. (done)
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- use av_new_stream() (partially done)
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- reconstruct mpeg header frame rate in telecine case so that we do
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not need to ifner the real rate if it is not possible.
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- remove unused DCT code.
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Short term fixes:
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- mpeg audio fix
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- AV sync fix (new api for demux)
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- RTP streaming support in ffserver
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- ffserver fix
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- fix stream selection (aka map) syntax. Start stream numbers at 1 in
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listing. Find a syntax for stream ids (such as TS pids).
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- reconstruct mpeg header frame rate in telecine case so that we do
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not need to infer the real rate if it is not possible.
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- remove unused DCT code.
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- AV sync fix
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- RTP/RTSP streaming support in ffserver and in libav
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- minimal support of video in ffplay
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Planned in next releases:
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