FFmpeg是一套可以用來記錄、轉換數字音頻、視頻，并能將其轉化為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，但它可以在包括Windows在內的大多數操作系統中編譯。這個項目是由Fabrice Bellard發起的，現在由Michael Niedermayer主持。可以輕易地實現多種視頻格式之間的相互轉換，例如可以將攝錄下的視頻avi等轉成現在視頻網站所采用的flv格式。
視頻轉碼工具FFmpeg 2014-03-24發布2.2正式版.新的產品系列。之前產品線為2.1.4,1.2.6.FFmpeg在視頻網站應該是必用的轉碼工具。
新特性：
- HNM version 4 demuxer and video decoder
- Live HDS muxer
- setsar/setdar filters now support variables in ratio expressions
- elbg filter
- string validation in ffprobe
- support for decoding through VDPAU in ffmpeg (the -hwaccel option)
- complete Voxware MetaSound decoder
- remove mp3_header_compress bitstream filter
- Windows resource files for shared libraries
- aeval filter
- stereoscopic 3d metadata handling
- WebP encoding via libwebp
- ATRAC3+ decoder
- VP8 in Ogg demuxing
- side & metadata support in NUT
- framepack filter
- XYZ12 rawvideo support in NUT
- Exif metadata support in WebP decoder
- OpenGL device
- Use metadata_header_padding to control padding in ID3 tags (currently used in
MP3, AIFF, and OMA files), FLAC header, and the AVI "junk" block.
- Mirillis FIC video decoder
- Support DNx444
- libx265 encoder
- dejudder filter
- Autodetect VDA like all other hardware accelerations
FFmpeg 2.2下載：http://ffmpeg.org/releases/ffmpeg-2.2.tar.bz2 - Live HDS muxer
- setsar/setdar filters now support variables in ratio expressions
- elbg filter
- string validation in ffprobe
- support for decoding through VDPAU in ffmpeg (the -hwaccel option)
- complete Voxware MetaSound decoder
- remove mp3_header_compress bitstream filter
- Windows resource files for shared libraries
- aeval filter
- stereoscopic 3d metadata handling
- WebP encoding via libwebp
- ATRAC3+ decoder
- VP8 in Ogg demuxing
- side & metadata support in NUT
- framepack filter
- XYZ12 rawvideo support in NUT
- Exif metadata support in WebP decoder
- OpenGL device
- Use metadata_header_padding to control padding in ID3 tags (currently used in
MP3, AIFF, and OMA files), FLAC header, and the AVI "junk" block.
- Mirillis FIC video decoder
- Support DNx444
- libx265 encoder
- dejudder filter
- Autodetect VDA like all other hardware accelerations