FFmpeg 2.1 發佈

FFmpeg是一套能夠用來記錄、轉換數字音頻、視頻，並能將其轉化爲流的開源計算機程序。它包括了目前領先的音/視頻編碼庫 libavcodec。 FFmpeg是在Linux下開發出來的，但它能夠在包括Windows在內的大多數操做系統中編譯。這個項目是由Fabrice Bellard發起的，如今由Michael Niedermayer主持。能夠輕易地實現多種視頻格式之間的相互轉換，例如能夠將攝錄下的視頻avi等轉成如今視頻網站所採用的flv格式。

2013-10-28發佈2.1.以前產品線爲2.0.2 1.2.4,1.1.5,1.0.7.FFmpeg在視頻網站應該是必用的轉碼工具。

徹底改進:

version 2.1:

- aecho filter
- perspective filter ported from libmpcodecs
- ffprobe -show_programs option
- compand filter
- RTMP seek support
- when transcoding with ffmpeg (i.e. not streamcopying), -ss is now accurate
  even when used as an input option. Previous behavior can be restored with
  the -noaccurate_seek option.
- ffmpeg -t option can now be used for inputs, to limit the duration of
  data read from an input file
- incomplete Voxware MetaSound decoder
- read EXIF metadata from JPEG
- DVB teletext decoder
- phase filter ported from libmpcodecs
- w3fdif filter
- Opus support in Matroska
- FFV1 version 1.3 is stable and no longer experimental
- FFV1: YUVA(444,422,420) 9, 10 and 16 bit support
- changed DTS stream id in lavf mpeg ps muxer from 0x8a to 0x88, to be
  more consistent with other muxers.
- adelay filter
- pullup filter ported from libmpcodecs
- ffprobe -read_intervals option
- Lossless and alpha support for WebP decoder
- Error Resilient AAC syntax (ER AAC LC) decoding
- Low Delay AAC (ER AAC LD) decoding
- mux chapters in ASF files
- SFTP protocol (via libssh)
- libx264: add ability to encode in YUVJ422P and YUVJ444P
- Fraps: use BT.709 colorspace by default for yuv, as reference fraps decoder does
- make decoding alpha optional for prores, ffv1 and vp6 by setting
  the skip_alpha flag.
- ladspa wrapper filter
- native VP9 decoder
- dpx parser
- max_error_rate parameter in ffmpeg
- PulseAudio output device
- ReplayGain scanner
- Enhanced Low Delay AAC (ER AAC ELD) decoding (no LD SBR support)
- Linux framebuffer output device
- HEVC decoder, raw HEVC demuxer, HEVC demuxing in TS, Matroska and MP4
- mergeplanes filter

下載:http://ffmpeg.org/releases/ffmpeg-2.1.tar.bz2