wrapper/FFmpeg
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
No description
120655 commits 40 branches 405 tags 230 MiB
Find a file
Kacper Michajłow e6635ada64 avfilter/vf_colordetect: optimize C functions a bit 
They are used to process tail, so it's still good to have them faster.
Even if AVX version are used.

GCC 14.2.0 | x86_64 (default config) | Before:

detect_alpha_8_full_c:                                3803.0 ( 1.00x)
detect_alpha_8_full_avx2:                              166.4 (22.86x)
detect_alpha_8_full_avx512icl:                         144.2 (26.37x)
detect_alpha_8_limited_c:                            10454.4 ( 1.00x)
detect_alpha_8_limited_avx2:                           616.5 (16.96x)
detect_alpha_8_limited_avx512icl:                      509.4 (20.52x)
detect_alpha_16_full_c:                               1903.0 ( 1.00x)
detect_alpha_16_full_avx2:                             172.4 (11.04x)
detect_alpha_16_full_avx512icl:                        163.4 (11.65x)
detect_alpha_16_limited_c:                            3703.6 ( 1.00x)
detect_alpha_16_limited_avx2:                          644.4 ( 5.75x)
detect_alpha_16_limited_avx512icl:                     558.0 ( 6.64x)
detect_range_8_c:                                     5855.9 ( 1.00x)
detect_range_8_avx2:                                   150.4 (38.94x)
detect_range_8_avx512icl:                              146.7 (39.91x)
detect_range_16_c:                                    2702.2 ( 1.00x)
detect_range_16_avx2:                                  256.7 (10.53x)
detect_range_16_avx512icl:                             116.8 (23.13x)

GCC 14.2.0 | x86_64 (default config) | After:

detect_alpha_8_full_c:                                 376.3 ( 1.00x)
detect_alpha_8_full_avx2:                              169.2 ( 2.22x)
detect_alpha_8_full_avx512icl:                         134.6 ( 2.80x)
detect_alpha_8_limited_c:                             6024.1 ( 1.00x)
detect_alpha_8_limited_avx2:                           641.8 ( 9.39x)
detect_alpha_8_limited_avx512icl:                      493.0 (12.22x)
detect_alpha_16_full_c:                                436.4 ( 1.00x)
detect_alpha_16_full_avx2:                             156.3 ( 2.79x)
detect_alpha_16_full_avx512icl:                        151.8 ( 2.87x)
detect_alpha_16_limited_c:                            3679.9 ( 1.00x)
detect_alpha_16_limited_avx2:                          642.0 ( 5.73x)
detect_alpha_16_limited_avx512icl:                     555.2 ( 6.63x)
detect_range_8_c:                                      655.2 ( 1.00x)
detect_range_8_avx2:                                   153.9 ( 4.26x)
detect_range_8_avx512icl:                              147.4 ( 4.45x)
detect_range_16_c:                                     743.3 ( 1.00x)
detect_range_16_avx2:                                  258.6 ( 2.87x)
detect_range_16_avx512icl:                             107.7 ( 6.90x)

Clang 19.1.7 | x86_64 (default config) | Before:

detect_alpha_8_full_c:                                7013.4 ( 1.00x)
detect_alpha_8_full_avx2:                              141.8 (49.46x)
detect_alpha_8_full_avx512icl:                         133.8 (52.40x)
detect_alpha_8_limited_c:                             7038.8 ( 1.00x)
detect_alpha_8_limited_avx2:                           605.0 (11.63x)
detect_alpha_8_limited_avx512icl:                      506.5 (13.90x)
detect_alpha_16_full_c:                               1799.5 ( 1.00x)
detect_alpha_16_full_avx2:                             143.0 (12.59x)
detect_alpha_16_full_avx512icl:                        127.5 (14.12x)
detect_alpha_16_limited_c:                            3499.6 ( 1.00x)
detect_alpha_16_limited_avx2:                          633.6 ( 5.52x)
detect_alpha_16_limited_avx512icl:                     551.9 ( 6.34x)
detect_range_8_c:                                     5253.6 ( 1.00x)
detect_range_8_avx2:                                   125.0 (42.01x)
detect_range_8_avx512icl:                              123.2 (42.65x)
detect_range_16_c:                                    3055.2 ( 1.00x)
detect_range_16_avx2:                                  230.0 (13.28x)
detect_range_16_avx512icl:                              95.9 (31.86x)

Clang 19.1.7 | x86_64 (default config) | After:

detect_alpha_8_full_c:                                 323.3 ( 1.00x)
detect_alpha_8_full_avx2:                              149.7 ( 2.16x)
detect_alpha_8_full_avx512icl:                         127.7 ( 2.53x)
detect_alpha_8_limited_c:                             5075.9 ( 1.00x)
detect_alpha_8_limited_avx2:                           625.4 ( 8.12x)
detect_alpha_8_limited_avx512icl:                      493.0 (10.30x)
detect_alpha_16_full_c:                                421.0 ( 1.00x)
detect_alpha_16_full_avx2:                             238.8 ( 1.76x)
detect_alpha_16_full_avx512icl:                        126.0 ( 3.34x)
detect_alpha_16_limited_c:                            3516.8 ( 1.00x)
detect_alpha_16_limited_avx2:                          624.7 ( 5.63x)
detect_alpha_16_limited_avx512icl:                     544.7 ( 6.46x)
detect_range_8_c:                                      609.1 ( 1.00x)
detect_range_8_avx2:                                   239.4 ( 2.54x)
detect_range_8_avx512icl:                               89.0 ( 6.84x)
detect_range_16_c:                                     463.9 ( 1.00x)
detect_range_16_avx2:                                  127.4 ( 3.64x)
detect_range_16_avx512icl:                              86.4 ( 5.37x)

Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
2025-08-11 17:39:23 +00:00
.forgejo forgejo/autolabeler: clean up logic a bit and prevent self-looping 2025-08-10 01:50:46 +02:00
compat all: fix typos found by codespell 2025-08-03 13:48:47 +02:00
doc Revert "doc/developer: Basic documentation for Source Plugins" 2025-08-11 19:53:28 +09:00
ffbuild all: fix typos found by codespell 2025-08-03 13:48:47 +02:00
fftools fftools/ffmpeg_enc: don't ignore user selected chroma location 2025-08-11 09:38:38 +02:00
libavcodec avcodec/scpr3: Clear clr 2025-08-11 11:54:31 +02:00
libavdevice Bump versions for master after release/8.0 2025-08-09 18:03:05 +02:00
libavfilter avfilter/vf_colordetect: optimize C functions a bit 2025-08-11 17:39:23 +00:00
libavformat avformat/mov: clear old name from infe 2025-08-11 01:25:05 +00:00
libavutil lavu/log: fix color for AV_CLASS_CATEGORY_HWDEVICE on non-Win32 2025-08-10 02:24:56 +00:00
libswresample Bump versions for master after release/8.0 2025-08-09 18:03:05 +02:00
libswscale Bump versions for master after release/8.0 2025-08-09 18:03:05 +02:00
presets
tests checkasm: ac3dsp: Increase the float tolerance for sum_square_butterfly_float 2025-08-10 02:27:44 +00:00
tools tools/target_fuzzer: don't spam stderr 2025-08-05 03:27:54 +02:00
.gitattributes gitattributes: End merge conflicts in Changelog 2025-03-17 15:26:10 +01:00
.gitignore forgejo/workflows: add initial rudimentary CI 2025-07-22 20:06:20 +02:00
.mailmap mailmap: add entry for myself 2025-08-08 21:51:15 +00:00
Changelog ffprobe: add -codec:<media_spec> option and -c:<media_spec> variant 2025-08-10 10:19:57 +02:00
configure libavfilter: Whisper audio filter 2025-08-08 21:59:56 +02:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 all: fix whitespace/new-line issues 2025-08-03 13:48:47 +02:00
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
FUNDING.json Add FUNDING.json 2025-06-23 14:48:40 +02:00
INSTALL.md all: fix typos found by codespell 2025-08-03 13:48:47 +02:00
LICENSE.md Remove libpostproc 2025-05-07 15:35:47 +02:00
MAINTAINERS MAINTAINERS: add myself as hwcontext_d3d12va maintainer 2025-08-08 21:51:15 +00:00
Makefile Makefile: Split ALLFFLIBS 2025-05-26 20:33:10 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update release number after release/7.1 branch 2024-10-09 01:55:50 +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.