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Zhao Zhili 520968debb avcodec/vc1dsp: always inline vc1_loop_filter 
vc1_loop_filter() is only reached through the six C wrappers. Clang 14
keeps it out of line with plain static inline, adding a 224-byte stack
frame before the tiny bestcase path on rpi 5. gcc 12 already inlines
it.

rpi 5 clang 14:
                                before  after
vc1_v_loop_filter4_bestcase_c   27.2     8.3   (3.3x)
vc1_h_loop_filter4_bestcase_c   26.4    10.2   (2.6x)
vc1_v_loop_filter8_bestcase_c   32.5    20.3   (1.6x)
vc1_h_loop_filter8_bestcase_c   31.7    19.5   (1.6x)
vc1_v_loop_filter16_bestcase_c  42.1    33.2   (1.3x)
vc1_h_loop_filter16_bestcase_c  41.6    25.3   (1.6x)

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
2026-06-03 10:41:08 +00:00
.forgejo .forgejo: add pull request template with fate-samples section 2026-06-01 10:40:57 -05:00
compat avfilter/scale_cuda: fix color bleeding in lanczos scaling 2026-04-04 11:31:16 +00:00
doc avutil/hwcontext_vulkan: publicly expose queue device creation flags 2026-06-02 13:32:43 +02:00
ffbuild ffbuild/common: remove DBG=1 to preprocess external asm 2026-04-03 16:15:33 +02:00
fftools fftools/opt_common: print encoder-specific capabilities in print_codec() 2026-06-02 20:39:56 +00:00
libavcodec avcodec/vc1dsp: always inline vc1_loop_filter 2026-06-03 10:41:08 +00:00
libavdevice avdevice/v4l2: fix mmap_free() skipping first buffer 2026-04-28 13:45:20 +00:00
libavfilter avfilter/f_ebur128: avoid signed-int wrap when sizing per-channel cache 2026-06-03 01:45:08 +00:00
libavformat avformat/mov: cap HEIF ICC profile copies via c*max_streams to bound CPU and memory 2026-06-02 20:55:14 +00:00
libavutil lavu/aarch64: unroll butterflies_float to 8 floats/iter 2026-06-03 09:36:59 +00:00
libswresample libswresample/arm: Change to the common indentation size 2026-04-29 13:49:27 +03:00
libswscale swscale/x86/yuv2rgb: fix planar GBRP boundary check in ssse3 assembly 2026-06-02 23:42:01 +00:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests fate/lavf-container: add an ADTS muxing test 2026-06-02 20:06:21 -03:00
tools tools/zmqsend: close the input FILE 2026-05-15 20:35:56 -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 avcodec/bsf: add dovi_split BSF 2026-05-31 16:58:23 +02:00
configure avcodec/libaomdec: use the ITU-T T35 parsing helpers 2026-06-02 19:50:39 -03:00
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 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 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.