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Reimar Döffinger b60dfae7af aacenc_utils: Use temporary variable. 
This ensures gcc does not create unnecessary
loads or stores and possibly even does not vectorize
the negation.
Speeds up mp3 to aac transcoding with default settings
by 10% when using "gcc (Debian 5.3.1-10) 5.3.1 20160224".

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
2016-03-08 23:56:51 +01:00
compat compat/os2threads: split long lines 2016-02-14 19:17:36 +01:00
doc avfilter/vf_waveform: make it possible to draw dots instead of lines 2016-03-08 23:14:57 +01:00
libavcodec aacenc_utils: Use temporary variable. 2016-03-08 23:56:51 +01:00
libavdevice configure&avdevice/jack: Fixed issue #43 JACK indev support on OSX 2016-02-22 00:46:49 +01:00
libavfilter avfilter/vf_waveform: make it possible to draw dots instead of lines 2016-03-08 23:14:57 +01:00
libavformat lavf/mp3dec: avoid printing useless message in default log level 2016-03-08 17:02:32 +01:00
libavresample Merge commit 'cc4c24208159200b7aff5b5c313903c7f23fa345' 2016-01-02 10:13:58 +01:00
libavutil avutil/color_utils: Mark test_data as static const 2016-03-03 21:17:45 +01:00
libpostproc postproc: fix unaligned access 2016-02-23 15:50:28 +01:00
libswresample x86: use the new helper macros where useful 2016-02-14 20:00:21 -03:00
libswscale sws/aarch64: add {nv12,nv21,yuv420p,yuv422p}_to_{argb,rgba,abgr,rgba}_neon 2016-03-01 17:53:33 +01:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests fate: Add test similar to ticket 1242 2016-03-08 03:32:21 +01:00
tools avcodec: Remove libstagefright 2016-01-06 16:43:06 +00:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore build: use a link instead of changing current directory when compiling 2016-01-25 20:43:34 +01:00
.travis.yml Merge commit 'eda183287489b2c705843aa373a19c4e46fb2fec' 2015-11-22 17:12:24 +00:00
arch.mak mips: rename mipsdspr1 to mipsdsp 2015-12-04 02:35:42 +01:00
Changelog lavc: add h264 mediacodec decoder 2016-03-07 11:28:29 +01:00
cmdutils_common_opts.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
cmdutils_opencl.c all: use FFDIFFSIGN to resolve possible undefined behavior in comparators 2015-11-03 16:28:30 -05:00
cmdutils.c cmdutils: realign for some additional filters with very long name 2016-02-06 12:48:51 +01:00
cmdutils.h fate/source: Do not use GNU extensions in sed 2016-02-13 07:59:00 -08:00
common.mak build: use a link instead of changing current directory when compiling 2016-01-25 20:43:34 +01:00
configure configure: build fix for P5600 with mips code restructuring 2016-03-08 17:36:46 +01:00
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COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file. 2012-02-09 12:26:45 +01:00
COPYING.LGPLv3
CREDITS CREDITS: redirect to Git log, remove current outdated content 2013-01-31 18:02:52 +01:00
ffmpeg_dxva2.c ffmpeg_dxva2: add a profile check for hevc 2016-02-15 12:34:19 +01:00
ffmpeg_filter.c ffmpeg_filter: Factor get_compliance_unofficial_pix_fmts() out 2016-02-10 13:28:23 +01:00
ffmpeg_opt.c ffmpeg: remove hardcoded 'now' creation_time support 2016-03-03 01:37:22 +01:00
ffmpeg_qsv.c Merge commit 'fb472e1a11a4e0caed2c3c91da01ea8e35d9e3f8' 2015-10-22 16:18:02 +02:00
ffmpeg_vdpau.c ffmpeg_vdpau: Free ctx on error path 2016-03-03 16:41:11 +01:00
ffmpeg_videotoolbox.c ffmpeg/videotoolbox: protect UTGetOSTypeFromString on both VDA and VT 2015-10-15 10:22:31 +02:00
ffmpeg.c ffmpeg: set sub_text_format to ass (without timing) by default 2016-02-26 21:53:34 +01:00
ffmpeg.h Merge commit 'bd49be885e9ad6bae599c54473ba2fa2957eb140' 2016-02-17 16:47:05 +00:00
ffplay.c ffplay: update docs after previous changes in ffplay mouse behaviour 2016-01-20 21:23:03 +01:00
ffprobe.c ffprobe: Deprecate stream timecode field and add frame side data timecode field 2016-02-01 18:19:30 +00:00
ffserver_config.c ffserver: NoVideo and NoAudio flags weren't cleared between streams. 2016-02-21 22:29:15 +01:00
ffserver_config.h ffserver: Use singlejpeg muxer for jpeg 2015-06-08 03:36:22 +02:00
ffserver.c ffserver: Fixed ffserver to support large ffm files 2016-03-08 11:39:29 +01:00
INSTALL.md INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak build: use a link instead of changing current directory when compiling 2016-01-25 20:43:34 +01:00
LICENSE.md LICENSE: Thorough editing 2016-02-28 08:19:44 -08:00
MAINTAINERS lavc: add h264 mediacodec decoder 2016-03-07 11:28:29 +01:00
Makefile build: use intermediate lcov coverage file 2016-02-06 15:42:09 +01:00
README.md README: replace http with https 2015-10-06 13:27:29 +02:00
RELEASE RELEASE: Update to 3.0.git 2016-02-15 10:20:33 -08:00
version.sh version.sh: add note that ffversion.h is auto-generated 2015-10-25 10:14:44 -04:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • ffserver is a multimedia streaming server for live broadcasts.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process. Few developers follow pull requests so they will likely be ignored.