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version <next>:
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- PB-frame decoding for H.263
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- deprecated vhook subsystem removed
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- deprecated old scaler removed
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- VQF demuxer
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- Alpha channel scaler
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- PCX encoder
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- RTP packetization of H.263
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- RTP packetization of AMR
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version 0.5:
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- DV50 AKA DVCPRO50 encoder, decoder, muxer and demuxer
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- TechSmith Camtasia (TSCC) video decoder
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- IBM Ultimotion (ULTI) video decoder
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- Sierra Online audio file demuxer and decoder
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- Apple QuickDraw (qdrw) video decoder
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- Creative ADPCM audio decoder (16 bits as well as 8 bits schemes)
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- Electronic Arts Multimedia (WVE/UV2/etc.) file demuxer
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- Miro VideoXL (VIXL) video decoder
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- H.261 video encoder
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- QPEG video decoder
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- Nullsoft Video (NSV) file demuxer
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- Shorten audio decoder
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- LOCO video decoder
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- Apple Lossless Audio Codec (ALAC) decoder
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- Winnov WNV1 video decoder
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- Autodesk Animator Studio Codec (AASC) decoder
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- Indeo 2 video decoder
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- Fraps FPS1 video decoder
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- Snow video encoder/decoder
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- Sonic audio encoder/decoder
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- Vorbis audio decoder
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- Macromedia ADPCM decoder
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- Duck TrueMotion 2 video decoder
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- support for decoding FLX and DTA extensions in FLIC files
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- H.264 custom quantization matrices support
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- ffserver fixed, it should now be usable again
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- QDM2 audio decoder
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- Real Cooker audio decoder
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- TrueSpeech audio decoder
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- WMA2 audio decoder fixed, now all files should play correctly
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- RealAudio 14.4 and 28.8 decoders fixed
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- JPEG-LS decoder
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- build system improvements
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- tabs and trailing whitespace removed from the codebase
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- CamStudio video decoder
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- AIFF/AIFF-C audio format, encoding and decoding
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- ADTS AAC file reading and writing
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- Creative VOC file reading and writing
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- American Laser Games multimedia (*.mm) playback system
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- Zip Motion Blocks Video decoder
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- improved Theora/VP3 decoder
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- True Audio (TTA) decoder
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- AVS demuxer and video decoder
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- JPEG-LS encoder
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- Smacker demuxer and decoder
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- NuppelVideo/MythTV demuxer and RTjpeg decoder
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- KMVC decoder
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- MPEG-2 intra VLC support
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- MPEG-2 4:2:2 encoder
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- Flash Screen Video decoder
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- GXF demuxer
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- Chinese AVS decoder
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- GXF muxer
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- MXF demuxer
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- VC-1/WMV3/WMV9 video decoder
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- MacIntel support
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- AVISynth support
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- VMware video decoder
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- VP5 video decoder
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- VP6 video decoder
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- WavPack lossless audio decoder
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- Targa (.TGA) picture decoder
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- Vorbis audio encoder
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- Delphine Software .cin demuxer/audio and video decoder
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- Tiertex .seq demuxer/video decoder
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- MTV demuxer
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- TIFF picture encoder and decoder
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- GIF picture decoder
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- Intel Music Coder decoder
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- Zip Motion Blocks Video encoder
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- Musepack decoder
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- Flash Screen Video encoder
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- Theora encoding via libtheora
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- BMP encoder
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- WMA encoder
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- GSM-MS encoder and decoder
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- DCA decoder
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- DXA demuxer and decoder
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- DNxHD decoder
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- Gamecube movie (.THP) playback system
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- Blackfin optimizations
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- Interplay C93 demuxer and video decoder
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- Bethsoft VID demuxer and video decoder
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- CRYO APC demuxer
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- Atrac3 decoder
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- V.Flash PTX decoder
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- RoQ muxer, RoQ audio encoder
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- Renderware TXD demuxer and decoder
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- extern C declarations for C++ removed from headers
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- sws_flags command line option
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- codebook generator
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- RoQ video encoder
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- QTRLE encoder
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- OS/2 support removed and restored again
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- AC-3 decoder
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- NUT muxer
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- additional SPARC (VIS) optimizations
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- Matroska muxer
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- slice-based parallel H.264 decoding
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- Monkey's Audio demuxer and decoder
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- AMV audio and video decoder
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- DNxHD encoder
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- H.264 PAFF decoding
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- Nellymoser ASAO decoder
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- Beam Software SIFF demuxer and decoder
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- libvorbis Vorbis decoding removed in favor of native decoder
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- IntraX8 (J-Frame) subdecoder for WMV2 and VC-1
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- Ogg (Theora, Vorbis and FLAC) muxer
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- The "device" muxers and demuxers are now in a new libavdevice library
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- PC Paintbrush PCX decoder
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- Sun Rasterfile decoder
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- TechnoTrend PVA demuxer
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- Linux Media Labs MPEG-4 (LMLM4) demuxer
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- AVM2 (Flash 9) SWF muxer
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- QT variant of IMA ADPCM encoder
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- VFW grabber
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- iPod/iPhone compatible mp4 muxer
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- Mimic decoder
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- MSN TCP Webcam stream demuxer
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- RL2 demuxer / decoder
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- IFF demuxer
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- 8SVX audio decoder
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- non-recursive Makefiles
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- BFI demuxer
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- MAXIS EA XA (.xa) demuxer / decoder
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- BFI video decoder
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- OMA demuxer
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- MLP/TrueHD decoder
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- Electronic Arts CMV decoder
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- Motion Pixels Video decoder
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- Motion Pixels MVI demuxer
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- removed animated GIF decoder/demuxer
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- D-Cinema audio muxer
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- Electronic Arts TGV decoder
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- Apple Lossless Audio Codec (ALAC) encoder
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- AAC decoder
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- floating point PCM encoder/decoder
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- MXF muxer
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- DV100 AKA DVCPRO HD decoder and demuxer
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- E-AC-3 support added to AC-3 decoder
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- Nellymoser ASAO encoder
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- ASS and SSA demuxer and muxer
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- liba52 wrapper removed
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- SVQ3 watermark decoding support
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- Speex decoding via libspeex
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- Electronic Arts TGQ decoder
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- RV40 decoder
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- QCELP / PureVoice decoder
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- RV30 decoder
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- hybrid WavPack support
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- R3D REDCODE demuxer
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- ALSA support for playback and record
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- Electronic Arts TQI decoder
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- OpenJPEG based JPEG 2000 decoder
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- NC (NC4600) camera file demuxer
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- Gopher client support
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- MXF D-10 muxer
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- generic metadata API
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version 0.4.9-pre1:
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- DV encoder, DV muxer
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- Microsoft RLE video decoder
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- Microsoft Video-1 decoder
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- Apple Animation (RLE) decoder
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- Apple Graphics (SMC) decoder
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- Apple Video (RPZA) decoder
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- Cinepak decoder
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- Sega FILM (CPK) file demuxer
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- Westwood multimedia support (VQA & AUD files)
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- Id Quake II CIN playback support
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- 8BPS video decoder
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- FLIC playback support
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- RealVideo 2.0 (RV20) decoder
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- Duck TrueMotion v1 (DUCK) video decoder
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- Sierra VMD demuxer and video decoder
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- MSZH and ZLIB decoder support
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- SVQ1 video encoder
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- AMR-WB support
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- PPC optimizations
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- rate distortion optimal cbp support
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- rate distorted optimal ac prediction for MPEG-4
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- rate distorted optimal lambda->qp support
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- AAC encoding with libfaac
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- Sunplus JPEG codec (SP5X) support
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- use Lagrange multipler instead of QP for ratecontrol
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- Theora/VP3 decoding support
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- XA and ADX ADPCM codecs
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- export MPEG-2 active display area / pan scan
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- Add support for configuring with IBM XLC
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- floating point AAN DCT
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- initial support for zygo video (not complete)
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- RGB ffv1 support
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- new audio/video parser API
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- av_log() system
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- av_read_frame() and av_seek_frame() support
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- missing last frame fixes
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- seek by mouse in ffplay
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- noise reduction of DCT coefficients
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- H.263 OBMC & 4MV support
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- H.263 alternative inter vlc support
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- H.263 loop filter
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- H.263 slice structured mode
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- interlaced DCT support for MPEG-2 encoding
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- stuffing to stay above min_bitrate
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- MB type & QP visualization
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- frame stepping for ffplay
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- interlaced motion estimation
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- alternate scantable support
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- SVCD scan offset support
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- closed GOP support
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- SSE2 FDCT
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- quantizer noise shaping
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- G.726 ADPCM audio codec
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- MS ADPCM encoding
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- multithreaded/SMP motion estimation
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- multithreaded/SMP encoding for MPEG-1/MPEG-2/MPEG-4/H.263
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- multithreaded/SMP decoding for MPEG-2
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- FLAC decoder
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- Metrowerks CodeWarrior suppport
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- H.263+ custom pcf support
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- nicer output for 'ffmpeg -formats'
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- Matroska demuxer
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- SGI image format, encoding and decoding
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- H.264 loop filter support
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- H.264 CABAC support
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- nicer looking arrows for the motion vector visualization
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- improved VCD support
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- audio timestamp drift compensation
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- MPEG-2 YUV 422/444 support
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- polyphase kaiser windowed sinc and blackman nuttall windowed sinc audio resample
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- better image scaling
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- H.261 support
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- correctly interleave packets during encoding
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- VIS optimized motion compensation
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- intra_dc_precision>0 encoding support
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- support reuse of motion vectors/MB types/field select values of the source video
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- more accurate deblock filter
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- padding support
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- many optimizations and bugfixes
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- FunCom ISS audio file demuxer and according ADPCM decoding
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version 0.4.8:
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- MPEG-2 video encoding (Michael)
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- Id RoQ playback subsystem (Mike Melanson and Tim Ferguson)
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- Wing Commander III Movie (.mve) file playback subsystem (Mike Melanson
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  and Mario Brito)
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- Xan DPCM audio decoder (Mario Brito)
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- Interplay MVE playback subsystem (Mike Melanson)
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- Duck DK3 and DK4 ADPCM audio decoders (Mike Melanson)
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version 0.4.7:
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- RealAudio 1.0 (14_4) and 2.0 (28_8) native decoders. Author unknown, code from mplayerhq
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  (originally from public domain player for Amiga at http://www.honeypot.net/audio)
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- current version now also compiles with older GCC (Fabrice)
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- 4X multimedia playback system including 4xm file demuxer (Mike
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  Melanson), and 4X video and audio codecs (Michael)
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- Creative YUV (CYUV) decoder (Mike Melanson)
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- FFV1 codec (our very simple lossless intra only codec, compresses much better
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  than HuffYUV) (Michael)
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- ASV1 (Asus), H.264, Intel indeo3 codecs have been added (various)
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- tiny PNG encoder and decoder, tiny GIF decoder, PAM decoder (PPM with
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  alpha support), JPEG YUV colorspace support. (Fabrice Bellard)
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- ffplay has been replaced with a newer version which uses SDL (optionally)
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  for multiplatform support (Fabrice)
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- Sorenson Version 3 codec (SVQ3) support has been added (decoding only) - donated
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  by anonymous
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- AMR format has been added (Johannes Carlsson)
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- 3GP support has been added (Johannes Carlsson)
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- VP3 codec has been added (Mike Melanson)
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- more MPEG-1/2 fixes
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- better multiplatform support, MS Visual Studio fixes (various)
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- AltiVec optimizations (Magnus Damn and others)
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- SH4 processor support has been added (BERO)
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- new public interfaces (avcodec_get_pix_fmt) (Roman Shaposhnick)
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- VOB streaming support (Brian Foley)
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- better MP3 autodetection (Andriy Rysin)
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- qpel encoding (Michael)
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- 4mv+b frames encoding finally fixed (Michael)
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- chroma ME (Michael)
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- 5 comparison functions for ME (Michael)
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- B-frame encoding speedup (Michael)
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- WMV2 codec (unfinished - Michael)
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- user specified diamond size for EPZS (Michael)
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- Playstation STR playback subsystem, still experimental (Mike and Michael)
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- ASV2 codec (Michael)
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- CLJR decoder (Alex)
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.. And lots more new enhancements and fixes.
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version 0.4.6:
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- completely new integer only MPEG audio layer 1/2/3 decoder rewritten
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  from scratch
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- Recoded DCT and motion vector search with gcc (no longer depends on nasm)
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- fix quantization bug in AC3 encoder
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- added PCM codecs and format. Corrected WAV/AVI/ASF PCM issues
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- added prototype ffplay program
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- added GOB header parsing on H.263/H.263+ decoder (Juanjo)
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- bug fix on MCBPC tables of H.263 (Juanjo)
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- bug fix on DC coefficients of H.263 (Juanjo)
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- added Advanced Prediction Mode on H.263/H.263+ decoder (Juanjo)
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- now we can decode H.263 streams found in QuickTime files (Juanjo)
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- now we can decode H.263 streams found in VIVO v1 files(Juanjo)
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- preliminary RTP "friendly" mode for H.263/H.263+ coding. (Juanjo)
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- added GOB header for H.263/H.263+ coding on RTP mode (Juanjo)
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- now H.263 picture size is returned on the first decoded frame (Juanjo)
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- added first regression tests
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- added MPEG-2 TS demuxer
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- new demux API for libav
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- more accurate and faster IDCT (Michael)
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- faster and entropy-controlled motion search (Michael)
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- two pass video encoding (Michael)
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- new video rate control (Michael)
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- added MSMPEG4V1, MSMPEGV2 and WMV1 support (Michael)
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- great performance improvement of video encoders and decoders (Michael)
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- new and faster bit readers and vlc parsers (Michael)
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- high quality encoding mode: tries all macroblock/VLC types (Michael)
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- added DV video decoder
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- preliminary RTP/RTSP support in ffserver and libavformat
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- H.263+ AIC decoding/encoding support (Juanjo)
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- VCD MPEG-PS mode (Juanjo)
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- PSNR stuff (Juanjo)
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- simple stats output (Juanjo)
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- 16-bit and 15-bit RGB/BGR/GBR support (Bisqwit)
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version 0.4.5:
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- some header fixes (Zdenek Kabelac <kabi at informatics.muni.cz>)
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- many MMX optimizations (Nick Kurshev <nickols_k at mail.ru>)
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- added configure system (actually a small shell script)
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- added MPEG audio layer 1/2/3 decoding using LGPL'ed mpglib by
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  Michael Hipp (temporary solution - waiting for integer only
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  decoder)
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- fixed VIDIOCSYNC interrupt
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- added Intel H.263 decoding support ('I263' AVI fourCC)
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- added Real Video 1.0 decoding (needs further testing)
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- simplified image formats again. Added PGM format (=grey
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  pgm). Renamed old PGM to PGMYUV.
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- fixed msmpeg4 slice issues (tell me if you still find problems)
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- fixed OpenDivX bugs with newer versions (added VOL header decoding)
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- added support for MPlayer interface
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- added macroblock skip optimization
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- added MJPEG decoder
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- added mmx/mmxext IDCT from libmpeg2
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- added pgmyuvpipe, ppm, and ppm_pipe formats (original patch by Celer
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  <celer at shell.scrypt.net>)
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- added pixel format conversion layer (e.g. for MJPEG or PPM)
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- added deinterlacing option
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- MPEG-1/2 fixes
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- MPEG-4 vol header fixes (Jonathan Marsden <snmjbm at pacbell.net>)
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- ARM optimizations (Lionel Ulmer <lionel.ulmer at free.fr>).
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- Windows porting of file converter
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- added MJPEG raw format (input/ouput)
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- added JPEG image format support (input/output)
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version 0.4.4:
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- fixed some std header definitions (Bjorn Lindgren
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  <bjorn.e.lindgren at telia.com>).
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- added MPEG demuxer (MPEG-1 and 2 compatible).
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- added ASF demuxer
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- added prototype RM demuxer
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- added AC3 decoding (done with libac3 by Aaron Holtzman)
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- added decoding codec parameter guessing (.e.g. for MPEG, because the
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  header does not include them)
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- fixed header generation in MPEG-1, AVI and ASF muxer: wmplayer can now
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  play them (only tested video)
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- fixed H.263 white bug
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- fixed phase rounding in img resample filter
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- add MMX code for polyphase img resample filter
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- added CPU autodetection
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- added generic title/author/copyright/comment string handling (ASF and RM
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  use them)
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- added SWF demux to extract MP3 track (not usable yet because no MP3
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  decoder)
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- added fractional frame rate support
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- codecs are no longer searched by read_header() (should fix ffserver
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  segfault)
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version 0.4.3:
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- BGR24 patch (initial patch by Jeroen Vreeken <pe1rxq at amsat.org>)
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- fixed raw yuv output
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- added motion rounding support in MPEG-4
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- fixed motion bug rounding in MSMPEG4
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- added B-frame handling in video core
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- added full MPEG-1 decoding support
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- added partial (frame only) MPEG-2 support
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- changed the FOURCC code for H.263 to "U263" to be able to see the
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  +AVI/H.263 file with the UB Video H.263+ decoder. MPlayer works with
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  this +codec ;) (JuanJo).
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- Halfpel motion estimation after MB type selection (JuanJo)
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- added pgm and .Y.U.V output format
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- suppressed 'img:' protocol. Simply use: /tmp/test%d.[pgm|Y] as input or
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  output.
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- added pgmpipe I/O format (original patch from Martin Aumueller
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  <lists at reserv.at>, but changed completely since we use a format
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  instead of a protocol)
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version 0.4.2:
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- added H.263/MPEG-4/MSMPEG4 decoding support. MPEG-4 decoding support
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  (for OpenDivX) is almost complete: 8x8 MVs and rounding are
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  missing. MSMPEG4 support is complete.
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- added prototype MPEG-1 decoder. Only I- and P-frames handled yet (it
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  can decode ffmpeg MPEGs :-)).
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- added libavcodec API documentation (see apiexample.c).
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- fixed image polyphase bug (the bottom of some images could be
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  greenish)
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- added support for non clipped motion vectors (decoding only)
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  and image sizes non-multiple of 16
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- added support for AC prediction (decoding only)
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- added file overwrite confirmation (can be disabled with -y)
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- added custom size picture to H.263 using H.263+ (Juanjo)
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version 0.4.1:
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- added MSMPEG4 (aka DivX) compatible encoder. Changed default codec
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  of AVI and ASF to DIV3.
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- added -me option to set motion estimation method
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  (default=log). suppressed redundant -hq option.
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- added options -acodec and -vcodec to force a given codec (useful for
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  AVI for example)
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- fixed -an option
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- improved dct_quantize speed
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- factorized some motion estimation code
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version 0.4.0:
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- removing grab code from ffserver and moved it to ffmpeg. Added
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  multistream support to ffmpeg.
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- added timeshifting support for live feeds (option ?date=xxx in the
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  URL)
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- added high quality image resize code with polyphase filter (need
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  mmx/see optimization). Enable multiple image size support in ffserver.
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- added multi live feed support in ffserver
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- suppressed master feature from ffserver (it should be done with an
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  external program which opens the .ffm url and writes it to another
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  ffserver)
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- added preliminary support for video stream parsing (WAV and AVI half
478
  done). Added proper support for audio/video file conversion in
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  ffmpeg.
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- added preliminary support for video file sending from ffserver
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- redesigning I/O subsystem: now using URL based input and output
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  (see avio.h)
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- added WAV format support
484
- added "tty user interface" to ffmpeg to stop grabbing gracefully
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- added MMX/SSE optimizations to SAD (Sums of Absolutes Differences)
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  (Juan J. Sierralta P. a.k.a. "Juanjo" <juanjo at atmlab.utfsm.cl>)
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- added MMX DCT from mpeg2_movie 1.5 (Juanjo)
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- added new motion estimation algorithms, log and phods (Juanjo)
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- changed directories: libav for format handling, libavcodec for
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  codecs
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version 0.3.4:
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- added stereo in MPEG audio encoder
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version 0.3.3:
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- added 'high quality' mode which use motion vectors. It can be used in
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  real time at low resolution.
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- fixed rounding problems which caused quality problems at high
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  bitrates and large GOP size
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version 0.3.2: small fixes
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- ASF fixes
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- put_seek bug fix
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version 0.3.1: added avi/divx support
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- added AVI support
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- added MPEG-4 codec compatible with OpenDivX. It is based on the H.263 codec
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- added sound for flash format (not tested)
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version 0.3: initial public release