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Zhong Li 0645698ecc lavc/qsvenc: disable h264 look_ahead by default 
Look_ahead can provide quality improvements, but would better disable it by default due to some reasons:
1. It is only available for some codecs (e.g. HEVC is not supported) on Intel
   Haswell and plus platforms. Thus means it will be failed on some platforms.
2. It significantly increases encoding latency and memory consumption.
3. It may overwrite some other options such as CBR and CAVLC.

Signed-off-by: Zhong Li <zhong.li@intel.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>
2018-03-06 00:23:16 +00:00
compat compat: remove in-tree NVidia headers 2018-02-27 16:22:12 +01:00
doc doc/bitstream_filters: correct dump_extra bsfs docs. 2018-03-03 23:01:41 +01:00
ffbuild Merge commit '17b6c7efb4' 2017-11-12 01:02:02 -03:00
fftools fftools/ffmpeg: update print_report to use AVBPrint API 2018-03-05 09:24:55 +01:00
libavcodec lavc/qsvenc: disable h264 look_ahead by default 2018-03-06 00:23:16 +00:00
libavdevice avdevice: add android_camera indev 2018-02-22 00:29:27 +01:00
libavfilter avfilter/avf_concat: add next command 2018-03-01 12:54:06 +01:00
libavformat avformat/mov: Initialize a potential gap in ctts_data in mov_build_index 2018-03-05 01:16:34 +01:00
libavresample avresample: remove deprecated attribute from the AVAudioResampleContext struct 2018-01-09 10:56:53 -03:00
libavutil Merge commit '8ca39b855a' 2018-03-05 22:31:03 +00:00
libpostproc postproc: Drop deprecated qp typedef 2017-10-22 00:35:23 -03:00
libswresample swresample/rematrix: fix update of channel matrix if input or output layout is undefined 2018-02-19 08:32:25 +01:00
libswscale swscale: Introduce a helper to identify semi-planar formats 2018-03-03 15:20:19 -08:00
presets
tests swscale: Add p016 output support and generalise yuv420p1x to p010 2018-03-02 14:52:48 -08:00
tools fftools, tools, examples: migrate to AVFormatContext->url 2018-01-28 23:06:43 +01:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore Remove the ffserver program 2018-01-06 18:31:37 +00:00
.travis.yml Merge commit '4809781586' 2017-10-28 15:08:31 -03:00
Changelog compat: remove in-tree NVidia headers 2018-02-27 16:22:12 +01:00
configure configure: rename cuda to ffnvcodec 2018-03-05 21:09:22 +01:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md Merge commit '4fef648d10' 2017-03-15 22:07:47 +01:00
MAINTAINERS Add myself as codec2 maintainer 2018-02-24 17:06:31 +01:00
Makefile lavd: add new API for iterating input and output devices 2018-02-06 18:57:42 +00:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE RELEASE: update for git after 3.4 branchpoint 2017-10-11 02:46:23 +02:00

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.
  • 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 and will be ignored.