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Steven Robertson c6a905b91d avcodec/dnxhddec: Do not overwrite colorspace if the container has set it. 
The existing logic overrides container metadata even in cases where the
container metadata must be trusted (e.g. HDR). The original spec had no
provision for specifying color volume, so many files rely on the
assumption of Rec. 709.

An update to the spec included a 'clv' field for explicitly signaling
that the container should be trusted in an existing bitfield in the
frame header, but the default of 0 from old encoders forces Rec. 709,
which would break any HDR stream. Because there is no place in DNxHR for
specifying a transfer function, DNxHR HDR files must include
container-level color information.

This patch maintains the existing behavior of choosing the 709 over the
601 matrix when container-level information is missing, and allows
container-level information to win if present.

Signed-off-by: Steven Robertson <steven@strobe.cc>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2017-11-30 02:46:22 +01:00
compat compat/cuda: Pass a logging context to load functions 2017-11-20 15:47:05 +00:00
doc Merge commit '99e9697e3a' 2017-11-29 21:06:49 -03:00
ffbuild Merge commit '17b6c7efb4' 2017-11-12 01:02:02 -03:00
fftools ffmpeg_opt: Constify hwaccel pointer. 2017-11-29 00:15:10 +01:00
libavcodec avcodec/dnxhddec: Do not overwrite colorspace if the container has set it. 2017-11-30 02:46:22 +01:00
libavdevice lavd/alsa: Double maximum alsa buffer size. 2017-11-27 14:05:28 +01:00
libavfilter Merge commit '99e9697e3a' 2017-11-29 21:06:49 -03:00
libavformat avformat/hlsplaylist: add missing header includes 2017-11-29 13:09:23 -03:00
libavresample Merge commit '07a2b15594' 2017-10-21 14:57:53 -03:00
libavutil Merge commit '99e9697e3a' 2017-11-29 21:06:49 -03:00
libpostproc postproc: Drop deprecated qp typedef 2017-10-22 00:35:23 -03:00
libswresample lswr/rematrix: Support s32p. 2017-11-01 01:04:43 +01:00
libswscale Fix missing used attribute for inline assembly variables 2017-11-13 03:58:34 +01:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests Merge commit '99e9697e3a' 2017-11-29 21:06:49 -03:00
tools tools/cl2c: Add a copyright header 2017-11-22 23:55:23 +00:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore build: add support for building .cu files via nvcc 2017-05-15 11:46:50 +02:00
.travis.yml Merge commit '4809781586' 2017-10-28 15:08:31 -03:00
Changelog Add HW H.264 and HEVC encoding for AMD GPUs based on AMF SDK 2017-11-28 22:14:42 +00:00
configure Add HW H.264 and HEVC encoding for AMD GPUs based on AMF SDK 2017-11-28 22:14:42 +00:00
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 INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
LICENSE.md Merge commit '4fef648d10' 2017-03-15 22:07:47 +01:00
MAINTAINERS MAINTAINERS: add myself as videotoolbox* maintainer 2017-11-13 19:54:20 +01:00
Makefile Makefile: fix distclean target 2017-11-14 10:09:40 -03:00
README.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
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.
  • 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 and will be ignored.