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avcodec/cbs_h266: fix wrong condition for chroma MTT depth in PH 
In the picture header parser, the chroma branch incorrectly tested
sps_max_mtt_hierarchy_depth_intra_slice_chroma to decide whether to
parse ph_log2_diff_max_{bt,tt}_min_qt_intra_slice_chroma.

Per ITU-T H.266 (V4, 01/2026) section 7.3.2.8 "Picture header
structure syntax", the condition is on the just-parsed
ph_max_mtt_hierarchy_depth_intra_slice_chroma, exactly mirroring the
luma branch a few lines above and the inter-slice branch below.
sps_partition_constraints_override_enabled_flag allows the picture
header to override the SPS values, so testing the SPS field is
incorrect and desynchronises the parser whenever the PH override
changes the chroma MTT depth from/to zero.

Signed-off-by: Mou Fan <moufan17@126.com>
2026-05-07 10:42:44 +01:00
.forgejo .forgejo/CODEOWNERS: fix ogg pattern for @toots 2026-05-03 17:05:25 +00:00
compat avfilter/scale_cuda: fix color bleeding in lanczos scaling 2026-04-04 11:31:16 +00:00
doc doc/examples/demux_decode: update ffplay command for audio and video output 2026-05-05 23:44:42 +00:00
ffbuild ffbuild/common: remove DBG=1 to preprocess external asm 2026-04-03 16:15:33 +02:00
fftools fftools/ffmpeg_opt: fix mismatching negative maps 2026-05-03 13:19:18 +00:00
libavcodec avcodec/cbs_h266: fix wrong condition for chroma MTT depth in PH 2026-05-07 10:42:44 +01:00
libavdevice avdevice/v4l2: fix mmap_free() skipping first buffer 2026-04-28 13:45:20 +00:00
libavfilter avfilter/vf_stereo3d: Add av_fallthrough 2026-05-03 18:22:51 +02:00
libavformat avformat/mov: Fix negative index given to can_seek_to_key_sample() 2026-05-05 21:26:38 +00:00
libavutil avutil/hwcontext_vulkan: Fix shadowing 2026-05-05 12:46:26 +02:00
libswresample libswresample/arm: Change to the common indentation size 2026-04-29 13:49:27 +03:00
libswscale swscale/ops_chain: Use av_fallthrough to mark fallthrough 2026-05-03 18:22:05 +02:00
presets
tests fate/filter-video: use run $(FFMPEG) for scale-zero-dim test 2026-05-01 23:45:30 +08:00
tools tools/check_arm_indent: Run formatting on arm, in addition to aarch64 2026-04-29 13:53:07 +03:00
.gitattributes gitattributes: End merge conflicts in Changelog 2025-03-17 15:26:10 +01:00
.gitignore swscale/aarch64: add NEON sws_ops backend 2026-03-30 11:38:35 +00:00
.mailmap mailmap: add entry for myself 2025-08-08 21:51:15 +00:00
Changelog avfilter/vf_frc_amf: Add AMF Frame Rate Converter filter 2026-04-21 16:47:05 +00:00
configure configure: add implicit-fallthrough warning flags 2026-04-28 12:29:37 +00:00
CONTRIBUTING.md CONTRIBUTING.md: add blank line after top heading 2026-04-20 12:32:50 +00:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 all: fix whitespace/new-line issues 2025-08-03 13:48:47 +02:00
COPYING.LGPLv3
CREDITS
FUNDING.json Add FUNDING.json 2025-06-23 14:48:40 +02:00
INSTALL.md INSTALL.md: add title heading and normalize section levels 2026-04-20 12:32:50 +00:00
LICENSE.md Remove libpostproc 2025-05-07 15:35:47 +02:00
MAINTAINERS MAINTAINERS: add myself for libavfilter 2026-04-25 19:18:28 +02:00
Makefile configure: add detection of assembler support for SME2 2026-03-04 23:52:36 +02:00
README.md README.md: use consistent ATX heading style 2026-04-20 12:32:50 +00:00
RELEASE RELEASE: update to 8.0 2025-08-14 08:42:29 -04:00

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.