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Andreas Rheinhardt 5e1dac380b avfilter/avfiltergraph: Fix use-after-free when inserting auto-converter 
When inserting an auto-resampler, it may be that the configuration
of the filters that the auto-resampler is supposed to connect is
already partially merged, i.e. converter->inputs[0].incfg.foo and
converter->outputs[0].outcfg.foo (where foo is one of formats,
samplerates, channel_layouts) can coincide. Therefore merging
the converter filter's input link might modify the outcfg of the
converter' outlink. Yet the current code in avfiltergraph.c used
pointers from before merging the inlink for merging the outlink,
leading to a use-after-free in command lines like:
$ ffmpeg -f lavfi -i anullsrc=cl=stereo -lavfi channelsplit,axcorrelate -f null -
Fix this by not using outdated values when merging the outlink.

This is a regression since 85a6404d7e.

Found-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 		2021-10-08 12:06:00 +02:00
compat Replace all occurences of av_mallocz_array() by av_calloc() 2021-09-20 01:03:52 +02:00
doc avcodec: GEM Raster image decoder 2021-10-08 20:37:36 +11:00
ffbuild avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
fftools fftools/ffmpeg, doc/examples: Remove redundant av_packet_unref 2021-10-03 20:50:49 +02:00
libavcodec avcodec: GEM Raster image decoder 2021-10-08 20:37:36 +11:00
libavdevice libavdevice/avfoundation.m: fix potential unreleased lock issue 2021-09-17 15:31:40 +02:00
libavfilter avfilter/avfiltergraph: Fix use-after-free when inserting auto-converter 2021-10-08 12:06:00 +02:00
libavformat avformat/img2dec: add GEM Raster image demuxer 2021-10-08 20:37:36 +11:00
libavutil avutil/detection_bbox: Fix av_detection_bbox_alloc failed if nb_bboxes == 0 2021-10-08 10:11:59 +08:00
libpostproc libpostproc/postprocess_template: Don't reimplement FFSWAP 2021-10-02 17:13:42 +02:00
libswresample swresample/aarch64: fix relocation out of range error 2021-09-25 21:55:29 +03:00
libswscale swscale/swscale: Pass slice location into unscaled code also for dst scaling 2021-10-03 20:38:29 +02:00
presets
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tests fate/cover-art: Add test for muxing cover arts to FLAC 2021-10-07 22:09:04 +02:00
tools tools/target_dec_fuzzer: Adjust threshold for WMV2 2021-09-26 17:22:22 +02:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
.mailmap mailmap: add entry for myself 2021-03-09 02:09:55 +00:00
.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
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COPYING.GPLv3
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COPYING.LGPLv2.1
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CREDITS
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Changelog avcodec: GEM Raster image decoder 2021-10-08 20:37:36 +11:00
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 avformat: add Argonaut Games CVG demuxer 2021-05-12 20:25:50 +10:00
Makefile FATE: add a test for sliced scaling 2021-08-08 19:26:05 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +01:00
configure avfilter/sharpen_npp: add sharpening video filter with borders control 2021-10-07 18:07:53 +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.