new generic FFT/MDCT code for audio codecs
[libav.git] / Changelog
6d291820 1version 0.4.6pre1:
739d6efa 2
3- completely new integer only mpeg audio layer 1/2/3 decoder rewritten
4 from scratch.
5- recoded dct and motion vector search with gcc (no longer depends on
6 nasm).
7- fix quantization bug in AC3 encoder.
8- added PCM codecs and format. Corrected wav/avi/asf pcm issues.
9- added prototype ffplay program.
10- added GOB header parsing on H.263/H.263+ decoder. (Juanjo)
11- bug fix on MCBPC tables of H.263. (Juanjo)
81401c1f 12- bug fix on DC coefficients of H.263. (Juanjo)
13- added Advanced Prediction Mode on H.263/H.263+ decoder. (Juanjo)
14- now we can decode H.263 streams found on QuickTime files. (Juanjo)
15- now we can decode H.263 streams found on VIVO v1 files.(Juanjo)
16- preliminary RTP "friendly" mode for H.263/H.263+ coding. (Juanjo)
17- added GOB header for H.263/H.263+ coding on RTP mode. (Juanjo)
18- now H.263 picture size is returned on the first decoded frame. (Juanjo)
7f913a35 19- added first regression tests
20- added MPEG2 TS demux
21- new demux API for libav
22- more accurate and faster IDCT (Michael)
23- faster and entropy controlled motion search (Michael)
24- two pass video encoding (Michael)
25- new video rate control (Michael)
26- added MSMPEG4V1, MSMPEGV2 and WMV1 support (Michael)
27- great performance improvement of video encoders and decoders (Michael)
28- new and faster bit readers and vlc parsers (Michael)
29- high quality encoding mode : tries all macroblock/VLC types (Michael)
30- added DV video decoder
31- preliminary RTP/RTSP support in ffserver and libavformat
739d6efa 32
33version 0.4.5:
35- some header fixes (Zdenek Kabelac <>).
36- many MMX optimizations (Nick Kurshev <>).
37- added configure system (actually a small shell script).
38- added mpeg audio layer 1/2/3 decoding using LGPL'ed mpglib by
39 Michael Hipp (temporary solution - waiting for integer only
40 decoder).
41- fixed VIDIOCSYNC interrupt.
42- added Intel H263 decoding support ('I263' avi fourCC)
43- added Real Video 1.0 decoding (needs further testing).
44- simplified image formats again. Added PGM format (=grey
45 pgm). Renamed old PGM to PGMYUV.
46- fixed msmpeg4 slice issues (tell me if you still find problems).
47- fixed opendivx bugs with newer versions (added VOL header decoding).
48- added support for mplayer interface.
16fbebe1 49- added macroblock skip optimization.
0c1e384c 50- added MJPEG decoder.
16fbebe1 51- added mmx/mmxext idct from libmpeg2.
52- added pgmyuvpipe, ppm, and ppm_pipe formats (original patch by Celer
53 <>).
54- added pixel format convertion layer (e.g. for MJPEG or PPM).
55- added deinterlacing option.
56- mpeg1/2 fixes.
57- mpeg4 vol header fixes (Jonathan Marsden <>).
58- ARM optimizations (Lionel Ulmer <>).
59- Windows porting of file converter.
60- added MJPEG raw format (input/ouput).
61- added JPEG image format support (input/output).
63version 0.4.4:
65- fixed some std header definitions (Bjorn Lindgren
66 <>).
67- added mpeg demux (mpeg 1 and 2 compatible).
68- added ASF demux.
69- added prototype RM demux.
70- added AC3 decoding (done with libac3 by Aaron Holtzman).
71- added decoding codec parameter guessing (.e.g. for mpeg, because the
72 header does not include them).
73- fixed header generation in mpeg1, AVI and ASF mux : wmplayer can now
74 play them (only tested video).
75- fixed h263 white bug.
76- fixed phase rounding in img resample filter.
77- add mmx code for polyphase img resample filter.
78- added CPU autodetect.
79- added generic title/author/copyright/comment string handling (ASF and RM use them).
80- added SWF demux to extract MP3 track (not usable yet because no MP3
81 decoder).
82- added fractional frame rate support.
83- codecs are no longer searched by read_header() (should fix ffserver
84 segfault).
86version 0.4.3:
88- BGR24 patch (initial patch by Jeroen Vreeken <>).
89- fixed raw yuv output.
90- added motion rounding support in MPEG4.
91- fixed motion bug rounding in MSMPEG4.
92- added B frame handling in video core.
93- added full MPEG1 decoding support.
94- added partial (frame only) MPEG2 support.
95- changed the FOURCC code for H.263 to "U263" to be able to see the
96+AVI/H.263 file with the UB Video H.263+ decoder. MPlayer works with
97this +codec ;) (JuanJo).
98- Halfpel motion estimation after mb type selection (JuanJo).
99- added pgm and .Y.U.V output format.
100- suppressed 'img:' protocol. Simply use: /tmp/test%d.[pgm|Y] as input or
101 output.
102- added pgmpipe I/O format (original patch from Martin Aumueller
103 <>, but changed completely since we use a format
104 instead of a protocol).
106version 0.4.2:
108- added H263/MPEG4/MSMPEG4 decoding support. MPEG4 decoding support
109 (for openDIVX) is almost complete: 8x8 MVs and rounding are
110 missing. MSMPEG4 support is complete.
111- added prototype MPEG1 decoder. Only I and P frames handled yet (it
112 can decode ffmpeg mpegs :-)).
113- added libavcodec API documentation (see apiexample.c).
114- fixed image polyphase bug (the bottom of some images could be
115 greenish).
116- added support for non clipped motion vectors (decoding only)
117 and image sizes non multiple of 16.
118- added support for AC prediction (decoding only).
119- added file overwrite confirmation (can be disabled with -y).
120- Added custom size picture to H.263 using H.263+ (Juanjo).
122version 0.4.1:
124- added MSMPEG4 (aka DIVX) compatible encoder. Changed default codec
125 of avi and asf to DIV3.
126- added -me option to set motion estimation method
127 (default=log). suppressed redundant -hq option.
128- added options -acodec and -vcodec to force a given codec (useful for
129 AVI for example).
130- fixed -an option.
131- improved dct_quantize speed.
132- factorized some motion estimation code.
134version 0.4.0:
136- removing grab code from ffserver and moved it to ffmpeg. Added multi
137 stream support to ffmpeg.
138- added timeshifting support for live feeds (option ?date=xxx in the
139 URL).
140- added high quality image resize code with polyphase filter (need
141 mmx/see optimisation). Enable multiple image size support in ffserver.
142- added multi live feed support in ffserver.
143- suppressed master feature from ffserver (it should be done with an
144 external program which opens the .ffm url and writes it to another
145 ffserver).
146- added preliminary support for video stream parsing (wav and avi half
147 done). Added proper support for audio/video file convertion in
148 ffmpeg.
149- added preliminary support for video file sending from ffserver.
150- redesigning I/O subsystem : now using URL based input and output
151 (see avio.h).
152- added wav format support.
153- added "tty user interface" to ffmpeg to stop grabbing gracefully.
154- added MMX/SSE optimizations to SAD (Sums of Absolutes Diferences)
155 (Juan J. Sierralta P. a.k.a. "Juanjo" <>).
156- added MMX DCT from mpeg2_movie 1.5 (Juanjo).
157- added new motion estimation algorithms, log and phods (Juanjo).
158- changed directories : libav for format handling, libavcodec for
159 codecs.
161version 0.3.4:
163- added stereo in mpeg audio encoder.
165version 0.3.3:
167- added 'high quality' mode which use motion vectors. It can be used in
168 real time at low resolution.
169- fixed rounding problems which caused quality problems at high
170 bitrates and large gop size.
172version 0.3.2: small fixes
174- asf fixes
175- put_seek bug fix
177version 0.3.1: added avi/divx support
179- added avi support
180- added mpeg4 codec compatible with open divx. It is based on the h263
181 codec.
182- added sound for flash format (not tested)
184version 0.3: initial public release