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Originally committed as revision 589 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2002-05-25 22:26:48 +00:00
parent 773a21b8fe
commit 360d33c9b6
2 changed files with 23 additions and 30 deletions
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25
doc/README.tech
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@ -27,20 +27,23 @@ Video:
vectors. Currently, only fcode = 1 is used for both H263/MPEG1. Half vectors. Currently, only fcode = 1 is used for both H263/MPEG1. Half
pel vectors are used. pel vectors are used.
I also plan to improve the bitrate control which is too simplistic.
Audio: Audio:
----- -----
- I rewrote the mpeg audio layer 2 compatible encoder from scratch. It - The mpeg audio layer 2 compatible encoder was rewritten from
is one of the simplest encoder you can imagine (800 lines of C code scratch. It is one of the simplest encoder you can imagine (800
!). It is also one of the fastest because of its simplicity. There lines of C code !). It is also one of the fastest because of its
are still some problems of overflow. A minimal psycho acoustic model simplicity. There are still some problems of overflow. A minimal
could be added. Currently, stereo is supported, but not joint psycho acoustic model could be added. Currently, stereo is
stereo. supported, but not joint stereo.
- I rewrote the AC3 audio encoder from scratch. It is fairly naive, - The AC3 audio encoder was rewritten from scratch. It is fairly
but the result are quiet interesting at 64 kbit/s. It includes naive, but the result are quiet interesting at 64 kbit/s. It
extensions for low sampling rates used in some Internet includes extensions for low sampling rates used in some Internet
formats. Differential and coupled stereo is not handled. Stereo formats. Differential and coupled stereo is not handled. Stereo
channels are simply handled as two mono channels. channels are simply handled as two mono channels.
- The mpeg audio layer 3 decoder was rewritten from scratch. It uses
only integers and can be 16 bit precision for the synthesis filter
at the expense of a slight precision loss. A slower bit exact mode
is available too for compliance testing.

28
doc/TODO
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@ -3,26 +3,16 @@ ffmpeg TODO list:
(in approximate decreasing priority order) (in approximate decreasing priority order)
Short term glantau's fixes: Short term fixes:
- regression tests (done).
- mpeg1/2 decode fix (unfortunately not much speed increase) (done)
- fix WORDS_BIGENDIAN issue (done)
- remove win project files (done)
- remove sub_xxx functions (done)
- mpeg2 transport stream support (decoding done)
- improved auto guess for formats (api change again in demux) (done)
- fix mpeg format tracking + handle frame rate change (done)
- suppress strlcpy (done)
- split mux/demux functions. (done)
- use av_new_stream() (partially done)
- reconstruct mpeg header frame rate in telecine case so that we do
not need to ifner the real rate if it is not possible.
- remove unused DCT code.
- mpeg audio fix - mpeg audio fix
- AV sync fix (new api for demux) - ffserver fix
- RTP streaming support in ffserver - fix stream selection (aka map) syntax. Start stream numbers at 1 in
listing. Find a syntax for stream ids (such as TS pids).
- reconstruct mpeg header frame rate in telecine case so that we do
not need to infer the real rate if it is not possible.
- remove unused DCT code.
- AV sync fix
- RTP/RTSP streaming support in ffserver and in libav
- minimal support of video in ffplay - minimal support of video in ffplay
Planned in next releases: Planned in next releases: