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Andreas Rheinhardt ac5eb3c751 avfilter/vf_showpalette: Fix double-free of AVFilterFormats on error 
The query_formats function of the showpalette filter tries to allocate
two lists of formats which on success are attached to more permanent objects
(AVFilterLinks) for storage afterwards. If attaching a list to an
AVFilterLink succeeds, the link becomes one (in this case the only one)
of the owners of the list. Yet if attaching the first list to its link
succeeds and attaching the second list fails, both lists were manually
freed, which means that the first link's pointer to the first list
becomes dangling and there will be a double-free when the first link is
cleaned up automatically.

This commit fixes this by removing the custom free code; this will
temporarily add a leaking codepath (if attaching a list to a link fails,
the list will leak), but this will be fixed shortly by making sure that
an AVFilterFormats without owner will be automatically freed when
attaching it to an AVFilterLink fails. Notice at most one list leaks
because as of this commit a new list is only allocated after the old list
has been successfully attached to a link.

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
(cherry picked from commit 76909c97c6)
2021-02-27 07:20:57 +01:00
compat compat/cuda/ptx2c: remove shell loop; fix BSD sed compat 2020-06-01 22:10:41 -05:00
doc Update for 4.3.2 2021-02-02 14:55:32 +01:00
ffbuild common.mak: Also clean Windows debug files. 2020-03-21 18:46:00 +01:00
fftools fftools/ffmpeg: Fix leak of AVFilterInOut in case of error 2021-02-27 07:20:56 +01:00
libavcodec avcodec/hapdec: Change compressed_offset to unsigned 32bit 2021-02-20 14:21:24 +01:00
libavdevice Bump minor versions to separate 4.3 from master 2020-06-08 22:49:04 +02:00
libavfilter avfilter/vf_showpalette: Fix double-free of AVFilterFormats on error 2021-02-27 07:20:57 +01:00
libavformat avformat/mlvdec: Only store dimensions after having validated them 2021-02-27 07:20:56 +01:00
libavresample avresample: remove deprecated attribute from the AVAudioResampleContext struct 2018-01-09 10:56:53 -03:00
libavutil libavutil/eval: Remove CONFIG_TRAPV special handling 2021-02-20 14:21:24 +01:00
libpostproc Bump minor versions to separate 4.3 from master 2020-06-08 22:49:04 +02:00
libswresample Bump minor versions to separate 4.3 from master 2020-06-08 22:49:04 +02:00
libswscale swscale/x86/yuv2rgb: fix crashes when loading alpha from unaligned buffers 2020-11-02 00:51:05 +01:00
presets
tests lavf/url: fix relative url parsing when the query string or fragment has a colon 2020-10-28 21:41:21 +01:00
tools tools/target_dec_fuzzer: enable mjpeg for tiff or tdsc 2020-06-08 20:45:56 +02:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore tools/python: add script to convert TensorFlow model (.pb) to native model (.model) 2019-07-01 10:23:47 -03:00
.mailmap mailmap: fix 3-address entries 2020-03-31 04:14:14 -05:00
.travis.yml Merge commit '899ee03088' 2019-03-14 15:53:16 -03:00
Changelog Changelog: update 2021-02-20 14:22:23 +01:00
configure configure: update copyright year 2021-01-01 09:44:00 +05:30
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
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 oggdec: remove the oggparsedaala subdemuxer 2020-05-23 19:07:20 +01:00
Makefile Makefile: Delete more created files when running "make distclean". 2020-03-11 11:43:01 +01:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE Update for 4.3.2 2021-02-02 14:55:32 +01:00
RELEASE_NOTES RELEASE_NOTES: Based on the version from 4.1 2020-06-14 22:02:34 +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.
  • 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.