added Michael's page
[libav.git] / Changelog
1version 0.4.6:
3- completely new mpeg audio layer 1/2/3 decoder rewritten from
4 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
739d6efa 22
23version 0.4.5:
25- some header fixes (Zdenek Kabelac <>).
26- many MMX optimizations (Nick Kurshev <>).
27- added configure system (actually a small shell script).
28- added mpeg audio layer 1/2/3 decoding using LGPL'ed mpglib by
29 Michael Hipp (temporary solution - waiting for integer only
30 decoder).
31- fixed VIDIOCSYNC interrupt.
32- added Intel H263 decoding support ('I263' avi fourCC)
33- added Real Video 1.0 decoding (needs further testing).
34- simplified image formats again. Added PGM format (=grey
35 pgm). Renamed old PGM to PGMYUV.
36- fixed msmpeg4 slice issues (tell me if you still find problems).
37- fixed opendivx bugs with newer versions (added VOL header decoding).
38- added support for mplayer interface.
16fbebe1 39- added macroblock skip optimization.
0c1e384c 40- added MJPEG decoder.
16fbebe1 41- added mmx/mmxext idct from libmpeg2.
42- added pgmyuvpipe, ppm, and ppm_pipe formats (original patch by Celer
43 <>).
44- added pixel format convertion layer (e.g. for MJPEG or PPM).
45- added deinterlacing option.
46- mpeg1/2 fixes.
47- mpeg4 vol header fixes (Jonathan Marsden <>).
48- ARM optimizations (Lionel Ulmer <>).
49- Windows porting of file converter.
50- added MJPEG raw format (input/ouput).
51- added JPEG image format support (input/output).
53version 0.4.4:
55- fixed some std header definitions (Bjorn Lindgren
56 <>).
57- added mpeg demux (mpeg 1 and 2 compatible).
58- added ASF demux.
59- added prototype RM demux.
60- added AC3 decoding (done with libac3 by Aaron Holtzman).
61- added decoding codec parameter guessing (.e.g. for mpeg, because the
62 header does not include them).
63- fixed header generation in mpeg1, AVI and ASF mux : wmplayer can now
64 play them (only tested video).
65- fixed h263 white bug.
66- fixed phase rounding in img resample filter.
67- add mmx code for polyphase img resample filter.
68- added CPU autodetect.
69- added generic title/author/copyright/comment string handling (ASF and RM use them).
70- added SWF demux to extract MP3 track (not usable yet because no MP3
71 decoder).
72- added fractional frame rate support.
73- codecs are no longer searched by read_header() (should fix ffserver
74 segfault).
76version 0.4.3:
78- BGR24 patch (initial patch by Jeroen Vreeken <>).
79- fixed raw yuv output.
80- added motion rounding support in MPEG4.
81- fixed motion bug rounding in MSMPEG4.
82- added B frame handling in video core.
83- added full MPEG1 decoding support.
84- added partial (frame only) MPEG2 support.
85- changed the FOURCC code for H.263 to "U263" to be able to see the
86+AVI/H.263 file with the UB Video H.263+ decoder. MPlayer works with
87this +codec ;) (JuanJo).
88- Halfpel motion estimation after mb type selection (JuanJo).
89- added pgm and .Y.U.V output format.
90- suppressed 'img:' protocol. Simply use: /tmp/test%d.[pgm|Y] as input or
91 output.
92- added pgmpipe I/O format (original patch from Martin Aumueller
93 <>, but changed completely since we use a format
94 instead of a protocol).
96version 0.4.2:
98- added H263/MPEG4/MSMPEG4 decoding support. MPEG4 decoding support
99 (for openDIVX) is almost complete: 8x8 MVs and rounding are
100 missing. MSMPEG4 support is complete.
101- added prototype MPEG1 decoder. Only I and P frames handled yet (it
102 can decode ffmpeg mpegs :-)).
103- added libavcodec API documentation (see apiexample.c).
104- fixed image polyphase bug (the bottom of some images could be
105 greenish).
106- added support for non clipped motion vectors (decoding only)
107 and image sizes non multiple of 16.
108- added support for AC prediction (decoding only).
109- added file overwrite confirmation (can be disabled with -y).
110- Added custom size picture to H.263 using H.263+ (Juanjo).
112version 0.4.1:
114- added MSMPEG4 (aka DIVX) compatible encoder. Changed default codec
115 of avi and asf to DIV3.
116- added -me option to set motion estimation method
117 (default=log). suppressed redundant -hq option.
118- added options -acodec and -vcodec to force a given codec (useful for
119 AVI for example).
120- fixed -an option.
121- improved dct_quantize speed.
122- factorized some motion estimation code.
124version 0.4.0:
126- removing grab code from ffserver and moved it to ffmpeg. Added multi
127 stream support to ffmpeg.
128- added timeshifting support for live feeds (option ?date=xxx in the
129 URL).
130- added high quality image resize code with polyphase filter (need
131 mmx/see optimisation). Enable multiple image size support in ffserver.
132- added multi live feed support in ffserver.
133- suppressed master feature from ffserver (it should be done with an
134 external program which opens the .ffm url and writes it to another
135 ffserver).
136- added preliminary support for video stream parsing (wav and avi half
137 done). Added proper support for audio/video file convertion in
138 ffmpeg.
139- added preliminary support for video file sending from ffserver.
140- redesigning I/O subsystem : now using URL based input and output
141 (see avio.h).
142- added wav format support.
143- added "tty user interface" to ffmpeg to stop grabbing gracefully.
144- added MMX/SSE optimizations to SAD (Sums of Absolutes Diferences)
145 (Juan J. Sierralta P. a.k.a. "Juanjo" <>).
146- added MMX DCT from mpeg2_movie 1.5 (Juanjo).
147- added new motion estimation algorithms, log and phods (Juanjo).
148- changed directories : libav for format handling, libavcodec for
149 codecs.
151version 0.3.4:
153- added stereo in mpeg audio encoder.
155version 0.3.3:
157- added 'high quality' mode which use motion vectors. It can be used in
158 real time at low resolution.
159- fixed rounding problems which caused quality problems at high
160 bitrates and large gop size.
162version 0.3.2: small fixes
164- asf fixes
165- put_seek bug fix
167version 0.3.1: added avi/divx support
169- added avi support
170- added mpeg4 codec compatible with open divx. It is based on the h263
171 codec.
172- added sound for flash format (not tested)
174version 0.3: initial public release