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James Almer 836b8001c9 avformat/mov: don't read duration from mvhd atom 
This duration is equal to the longest duration in all track's tkhd atoms, which
may be comprised of the sum of all edit lists in each track. Empty edit lists
in tracks represent start_time, and the actual media duration is stored in the
mdhd atom.
This change lets the generic demux code derive the longest track duration taken
from mdhd atoms, so the correct duration and start_time combination will be
reported.

Should fix ticket #9775.

Reviewed-by: zhilizhao(赵志立) <quinkblack@foxmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2022-09-08 20:06:06 -03:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc lavc/qsvenc: use VBR if maxrate is not specified on Windows 2022-09-07 14:01:06 +08:00
ffbuild ffbuild/common: Fix CPPFLAGS applied for compiling C++ files 2022-05-24 21:30:52 +02:00
fftools fftools/ffprobe: Report initial and trailing padding 2022-09-05 20:32:12 +02:00
libavcodec avcodec/flac_parser: add missed opportunity to check crc 2022-09-08 10:03:32 +02:00
libavdevice avutil/internal: Move avpriv-file API to a header of its own 2022-09-03 15:41:44 +02:00
libavfilter avfilter/vf_showinfo: remove backspaces 2022-09-08 21:29:41 +02:00
libavformat avformat/mov: don't read duration from mvhd atom 2022-09-08 20:06:06 -03:00
libavutil lavu/hwcontext_qsv: add support for AV_PIX_FMT_VUYX on Linux 2022-09-07 14:04:12 +08:00
libpostproc configure: always enable gnu_windres if available 2022-08-13 14:42:36 +02:00
libswresample lswr: take const AVChannelLayout* in swr_alloc_set_opts2() 2022-08-24 18:31:05 -05:00
libswscale swscale/input: Remove spec-incompliant ';' 2022-09-08 19:21:30 +02:00
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tests avformat/mov: don't read duration from mvhd atom 2022-09-08 20:06:06 -03:00
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Changelog lavc/vaapi: Add support for remaining 10/12bit profiles 2022-09-03 16:19:40 -07:00
configure lavf/dv: always provide avpriv_dv_* symbols 2022-09-05 08:01:17 +02:00
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LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: Add ED25519 key for signing my commits in the future 2022-08-09 21:57:31 +02:00
Makefile Makefile: Prompt for reconfigure on lavc/hwaccels.h modification 2022-07-01 00:34:38 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +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 means to alter decoded audio and video through a directed graph of connected 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.