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Andreas Rheinhardt 4ebfc13c33 avformat/matroskaenc: Don't ignore tags of chapters written late 
The Matroska muxer writes the Chapters early when chapters were already
available when writing the header; in this case any tags pertaining to
these chapters get written, too.

Yet if no chapters had been supplied before writing the header, Chapters
can also be written when writing the trailer if any are supplied. Tags
belonging to these chapters were up until now completely ignored.

This commit changes this: Writing the tags belonging to chapters has
been moved to mkv_write_chapters(). If mkv_write_tags() has not been
called yet (i.e. when chapters are written when writing the header),
the AVIOContext for writing the ordinary Tags element is used, but not
output, as this is left to mkv_write_tags() in order to only write one
Tags element. Yet if mkv_write_tags() has already been called,
mkv_write_chapters() will output a Tags element of its own which only
contains the tags for chapters.

When chapters are available initially, the corresponding tags will now
be the first tags in the Tags element; but the ordering of tags in Tags
is irrelevant anyway.

This commit also makes chapter_id_offset local to mkv_write_chapters()
as it is used only there and not reused at all.

Potentially writing a second Tags element means that the maximum number
of SeekHead entries had to be incremented. All the changes to FATE
result from the ensuing increase in the amount of space reserved for the
SeekHead (21 bytes more).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-05-19 03:34:44 +02:00
compat
doc avutil: bump version after addition of av_sat_add64 and av_sat_sub64 2020-05-17 16:05:15 -03:00
ffbuild
fftools
libavcodec avcodec/frame_thread_encoder: check for frame threading codec cap instead of intra only 2020-05-18 12:39:34 -03:00
libavdevice
libavfilter avfilter/vsrc_sierpinski: unbreak configuring rate value 2020-05-16 11:13:46 +02:00
libavformat avformat/matroskaenc: Don't ignore tags of chapters written late 2020-05-19 03:34:44 +02:00
libavresample
libavutil lavc/qsvdec: add decode support for HEVC 4:2:2 8-bit and 10-bit 2020-05-18 13:32:50 +08:00
libpostproc
libswresample
libswscale swscale: aarch64: Add a NEON implementation of interleaveBytes 2020-05-15 23:38:17 +03:00
presets
tests avformat/matroskaenc: Don't ignore tags of chapters written late 2020-05-19 03:34:44 +02:00
tools
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Changelog avfilter/vf_scdet: add filter to detect scene change 2020-05-14 23:03:06 +08:00
configure avfilter/vf_scdet: add filter to detect scene change 2020-05-14 23:03:06 +08:00
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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.