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Andreas Rheinhardt deb6476fd8 avfilter/graphparser: Fix memleak when linking filters fails 
Parsing labeled outputs involves a check for an already known match
(a labeled input with the same name) to pair them together. If yes,
it is attempted to create a link between the two filters; in this case
the AVFilterInOuts have fulfilled their purpose and are freed. Yet if
creating the link fails, these AVFilterInOuts have up until now not been
freed, although they had already been removed from their respective lists
(which means that they are not freed automatically). In other words:
They leak. This commit fixes this.

This fixes ticket #7084. Said ticket contains an example program to
reproduce a leak. It can also be reproduced with ffmpeg alone, e.g. with
the complex filters "[0]null[1],[2]anull[0]" or with "[0]abitscope[0]".
All of these three examples involve media type mismatches which make it
impossible to create the links. The bug could also be triggered by other
means, e.g. failure to allocate the necessary AVFilterLink.

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
 		2020-08-23 19:57:42 +02:00
compat compat/cuda/ptx2c: remove shell loop; fix BSD sed compat 2020-06-01 22:10:41 -05:00
doc avfilter/af_biquads: add different transform types 2020-08-21 22:46:07 +02:00
ffbuild ffbuild: Refine MIPS handling 2020-07-23 16:30:02 +02:00
fftools fftools/ffmpeg: Fix leak of AVFilterInOut in case of error 2020-08-23 19:57:42 +02:00
libavcodec cbs_av1: Fix test for presence of buffer_removal_time element 2020-08-23 18:43:58 +01:00
libavdevice avdevice/xcbgrab: check return values of xcb query functions 2020-08-15 15:32:52 -04:00
libavfilter avfilter/graphparser: Fix memleak when linking filters fails 2020-08-23 19:57:42 +02:00
libavformat avformat/mpegtsenc: support DVB 6A descriptor for AC-3 2020-08-23 07:19:11 +08:00
libavresample avresample: remove deprecated attribute from the AVAudioResampleContext struct 2018-01-09 10:56:53 -03:00
libavutil lavu/buffer: forward av_buffer_realloc() error code. 2020-08-21 11:44:30 +02:00
libpostproc Bump minor versions after branching 4.3 2020-06-08 22:49:04 +02:00
libswresample swresample/rematrix: handle 22.2 as a 9 channel layout 2020-08-18 22:47:35 +03:00
libswscale swscale/x86/output: add missing AVX2 support preprocessor wrappers 2020-08-20 15:14:56 -03:00
presets
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tests fate: add fate-sub-dvb test 2020-08-22 19:02:01 +02:00
tools tools/target_dec_fuzzer: Adjust threshold for DST 2020-08-18 14:56:04 +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: add entry for myself 2020-07-13 11:24:04 +08:00
.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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COPYING.LGPLv3
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CREDITS
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Changelog avcodec: add RPZA encoder 2020-08-21 22:46:07 +02:00
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 MAINTAINERS: add myself and gpg fingerprint 2020-07-17 21:57:18 +02:00
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 RELEASE: We are after the 4.3 branch point, update for that 2020-06-10 00:20:24 +02:00
configure avformat/mpegtsenc: support DVB 6A descriptor for AC-3 2020-08-23 07:19:11 +08:00

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.