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Andreas Rheinhardt c28e553cbf avcodec/mpegutils: Fix ff_draw_horiz_band() 
Broken in 5ecf5b93dd.

More precisely, 3994623df2 changed
the precursor of ff_mpv_reconstruct_mb() to always decode
to the first row of macroblocks for B pictures when
a draw_horiz_band callback is set and to (they are exported to
the caller via said callback and each row overwrites the previously
decoded row; this was probably intended as a cache-optimization).
This first macroblock row was used as source for the draw_horiz_band
callback.

This of course means that the ordinary output B-frame was not
decoded correctly at all. Therefore the first aforementioned commit
removed this special handling of draw_horiz_band; yet it did not
remove the special handling for B-frames in ff_draw_horiz_band(),
which broke draw_horiz_band for B-frames. This commit fixes this.

(Actually, draw_horiz_band was already broken before
5ecf5b93dd when using slice-threading:
All slice-threads would write to the first row of macroblocks
for B-frames, leading to data races. It seems no one has ever complained
about this, just as no one has ever complained about the breakage
caused by 5ecf5b93dd. Probably no one
uses draw_horiz_band.)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-06-20 18:58:38 +02:00
compat avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
doc avutil/stereo3d: Fill out stereo info provided by Vision Pro files 2024-06-18 14:47:40 +01:00
ffbuild riscv: add Zvbb vector bit manipulation extension 2024-05-11 11:38:49 +03:00
fftools fftools/ffprobe: Print more Stereo 3D info from side data 2024-06-18 14:47:40 +01:00
libavcodec avcodec/mpegutils: Fix ff_draw_horiz_band() 2024-06-20 18:58:38 +02:00
libavdevice avdevice/avfoundation: add external video devices 2024-06-20 18:52:06 +02:00
libavfilter avfilter/qsvvpp: Remove unreachable code 2024-06-19 13:23:07 +02:00
libavformat avformat: split off generic NAL function helpers into their own file 2024-06-20 08:57:45 -03:00
libavutil avutil/stereo3d: Fill out stereo info provided by Vision Pro files 2024-06-18 14:47:40 +01:00
libpostproc avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
libswresample avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
libswscale swscale/aarch64: add neon {lum,chr}ConvertRange 2024-06-18 23:12:41 +02:00
presets
tests avcodec/me_cmp: Zero MECmpContext in ff_me_cmp_init() 2024-06-20 18:58:38 +02:00
tools tools/decode_simple: Check avcodec_send_packet() for errors on flushing 2024-05-28 03:48:06 +02:00
.gitattributes lavf/assenc: normalize line endings to \n 2024-02-11 17:01:07 -08:00
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap .mailmap: Update my mailmap entry 2024-02-23 00:17:21 +01:00
Changelog avcodec: add external enc libvvenc for H266/VVC 2024-06-15 21:00:05 +08:00
configure configure: Remove obsolete mpeg4_decoder->mpeg4video_parser dependency 2024-06-20 18:58:38 +02:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: Update the entries for the release maintainer for FFmpeg 2024-06-19 12:36:02 +02:00
Makefile riscv: add Zvbb vector bit manipulation extension 2024-05-11 11:38:49 +03:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update after 7.0 branch 2024-04-02 13:02:39 -03:00

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.