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Linshizhi
ffmpeg.wasm-core
Commits
360d33c9
Commit
360d33c9
authored
May 25, 2002
by
Fabrice Bellard
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update
Originally committed as revision 589 to
svn://svn.ffmpeg.org/ffmpeg/trunk
parent
773a21b8
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README.tech
doc/README.tech
+14
-11
TODO
doc/TODO
+8
-18
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doc/README.tech
View file @
360d33c9
...
@@ -27,20 +27,23 @@ Video:
...
@@ -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 mode
l
simplicity. There are still some problems of overflow. A minima
l
could be added. Currently, stereo is supported, but not joint
psycho acoustic model could be added. Currently, stereo is
stereo.
s
upported, but not joint s
tereo.
-
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.
doc/TODO
View file @
360d33c9
...
@@ -3,26 +3,16 @@ ffmpeg TODO list:
...
@@ -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).
- mpeg audio fix
- mpeg1/2 decode fix (unfortunately not much speed increase) (done)
- ffserver fix
- fix WORDS_BIGENDIAN issue (done)
- fix stream selection (aka map) syntax. Start stream numbers at 1 in
- remove win project files (done)
listing. Find a syntax for stream ids (such as TS pids).
- 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
- reconstruct mpeg header frame rate in telecine case so that we do
not need to i
fn
er the real rate if it is not possible.
not need to i
nf
er the real rate if it is not possible.
- remove unused DCT code.
- remove unused DCT code.
- mpeg audio fix
- AV sync fix
- AV sync fix (new api for demux)
- RTP/RTSP streaming support in ffserver and in libav
- RTP streaming support in ffserver
- minimal support of video in ffplay
- minimal support of video in ffplay
Planned in next releases:
Planned in next releases:
...
...
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