vectors. Currently, only fcode = 1 is used for both H263/MPEG1. Half
pel vectors are used.
-I also plan to improve the bitrate control which is too simplistic.
-
Audio:
-----
-- I rewrote the mpeg audio layer 2 compatible encoder from scratch. It
- is one of the simplest encoder you can imagine (800 lines of C code
- !). It is also one of the fastest because of its simplicity. There
- are still some problems of overflow. A minimal psycho acoustic model
- could be added. Currently, stereo is supported, but not joint
- stereo.
+- The mpeg audio layer 2 compatible encoder was rewritten from
+ scratch. It is one of the simplest encoder you can imagine (800
+ lines of C code !). It is also one of the fastest because of its
+ simplicity. There are still some problems of overflow. A minimal
+ psycho acoustic model could be added. Currently, stereo is
+ supported, but not joint stereo.
-- I rewrote the AC3 audio encoder from scratch. It is fairly naive,
- but the result are quiet interesting at 64 kbit/s. It includes
- extensions for low sampling rates used in some Internet
+- The AC3 audio encoder was rewritten from scratch. It is fairly
+ naive, but the result are quiet interesting at 64 kbit/s. It
+ includes extensions for low sampling rates used in some Internet
formats. Differential and coupled stereo is not handled. Stereo
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.
(in approximate decreasing priority order)
-Short term glantau's 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)
-
+Short term fixes:
+- mpeg audio fix
+- ffserver fix
+- 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 ifner the real rate if it is not possible.
+ not need to infer the real rate if it is not possible.
- remove unused DCT code.
-- mpeg audio fix
-- AV sync fix (new api for demux)
-- RTP streaming support in ffserver
+- AV sync fix
+- RTP/RTSP streaming support in ffserver and in libav
- minimal support of video in ffplay
Planned in next releases: