virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-08 13:22:53 +02:00
Code Issues Releases Activity
Mirror of https://git.ffmpeg.org/ffmpeg.git
89,396 Commits 37 Branches 400 Tags 470 MiB
C 90.3%
Assembly 7.8%
Makefile 1.3%
C++ 0.2%
Objective-C 0.2%
Other 0.1%
180f8216cd
Go to file
Janne Grunau 180f8216cd aarch64: vp9mc: Load only 12 pixels in the 4 pixel wide horizontal filter 
This reduces the amount the horizontal filters read beyond the filter
width to a consistent 1 pixel. The data is not used so this is usually
not noticeable. It becomes a problem when the application allocates
frame buffers only for the aligned picture size and the end of it is at
a page boundary. This happens for picture sizes which are a multiple of
the page size like 1280x640. The frame buffer allocation is based on
its most likely done via mmap + MAP_ANONYMOUS so start and end of the
buffer are page aligned and the previous and next page are not
necessarily mapped.
Under these conditions like seen by Firefox a read beyond the end of the
buffer results in a segfault.
After the over-read is reduced to a single pixel it's reasonable to use
VP9's emulated edge motion compensation for this.

Fixes: https://bugzilla.mozilla.org/show_bug.cgi?id=1881185
Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit 430c38f698)
2025-01-04 07:28:47 -05:00
compat compat/cuda/ptx2c: strip CR from each line 2017-08-30 11:20:34 +02:00
doc doc/html: fix styling issue with Texinfo 7.0 2023-11-09 00:22:42 +01:00
ffbuild build: prevent SDL2 from polluting global cflags and extralibs 2017-10-09 21:41:11 -03:00
fftools fftools/ffmpeg_opt: Fix leak of options when parsing options fails 2022-05-04 19:28:19 +02:00
libavcodec aarch64: vp9mc: Load only 12 pixels in the 4 pixel wide horizontal filter 2025-01-04 07:28:47 -05:00
libavdevice avdevice/decklink_dec: Fix ;; 2018-06-18 01:16:03 +02:00
libavfilter avfilter/vf_signature: Dont crash on no frames 2024-04-03 01:33:39 +02:00
libavformat avformat/mxfdec: Check index_edit_rate 2024-04-04 21:10:50 +02:00
libavresample Bump minor versions for branching 3.4 2017-10-11 01:23:47 +02:00
libavutil avformat/timecode: use 64bit for intermediate for rounding in fps_from_frame_rate() 2024-04-03 01:02:22 +02:00
libpostproc postproc/postprocess_template: remove FF_REG_sp from clobber list 2019-03-24 10:38:51 +01:00
libswresample swresample/swresample: Fix input channel count in resample_first computation 2018-10-28 02:22:42 +02:00
libswscale swscale/utils: Fix xInc overflow 2024-04-04 21:09:53 +02:00
presets
tests fate/subtitles: Ignore line endings for sub-scc test 2024-04-14 03:25:15 +02:00
tools tools/cws2fws: Check read() for failure 2021-09-11 21:23:49 +02:00
.gitattributes
.gitignore
.travis.yml build: Prefer NASM assembler over YASM 2017-06-21 17:00:30 -03:00
Changelog Changelog: update 2023-06-10 22:49:06 +02:00
configure configure: Enable section_data_rel_ro for FreeBSD and NetBSD aarch64 / arm 2023-12-26 00:18:49 +01:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS Use https for repository links 2023-06-04 20:18:18 +02:00
INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: Add ED25519 key for signing my commits in the future 2022-08-23 22:21:01 +02:00
Makefile Makefile: generate stripped CLI tools directly instead of copying unstripped ones first 2017-10-10 19:45:14 +02:00
README.md
RELEASE Update for 3.4.13 2023-06-04 20:26:33 +02:00
RELEASE_NOTES Update missed irc links 2021-09-11 21:23:49 +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 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.
  • ffserver is a multimedia streaming server for live broadcasts.
  • 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.