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Andreas Rheinhardt dd8a55cb3e avcodec/zlib_wrapper: Add wrappers for zlib inflateInit, inflateEnd 
It is not documented to be safe to call inflateEnd() on a z_stream
that has never been successfully been initialized by inflateInit(),
but just zeroed. It just happens to work and several codecs rely
on this (they have FF_CODEC_CAP_INIT_CLEANUP set and even call
inflateEnd() when inflateInit() failed or has never been called).
To avoid this, other codecs recorded whether their zstream has been
initialized successfully or not.

This commit adds wrappers for inflateInit() and inflateEnd() that
do what these other codecs do; furthermore, they also take care of
properly setting up the zstream before inflateInit() and emit
an error message in case of error.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-03-19 00:18:35 +01:00
compat Replace all occurences of av_mallocz_array() by av_calloc() 2021-09-20 01:03:52 +02:00
doc Keep including the full version.h when headers are included externally 2022-03-19 00:01:57 +02:00
ffbuild Fix libversion.sh for split version headers, to unbreak shared library builds 2022-03-17 11:11:17 +02:00
fftools ffmpeg: remove usage of internal deprecation macro 2022-03-16 13:00:42 -03:00
libavcodec avcodec/zlib_wrapper: Add wrappers for zlib inflateInit, inflateEnd 2022-03-19 00:18:35 +01:00
libavdevice Keep including the full version.h when headers are included externally 2022-03-19 00:01:57 +02:00
libavfilter Keep including the full version.h when headers are included externally 2022-03-19 00:01:57 +02:00
libavformat Keep including the full version.h when headers are included externally 2022-03-19 00:01:57 +02:00
libavutil avutil/opt: add missing case for AV_OPT_TYPE_CHLAYOUT in av_opt_free() 2022-03-18 18:59:03 -03:00
libpostproc Keep including the full version.h when headers are included externally 2022-03-19 00:01:57 +02:00
libswresample Keep including the full version.h when headers are included externally 2022-03-19 00:01:57 +02:00
libswscale Keep including the full version.h when headers are included externally 2022-03-19 00:01:57 +02:00
presets
tests fate: add tpad filter tests 2022-03-18 10:25:13 +01:00
tools tools/target_dec_fuzzer: Adjust threshold for TQI 2022-03-17 22:27:24 +01:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: add entry for myself 2021-03-09 02:09:55 +00:00
.travis.yml Merge commit '899ee03088' 2019-03-14 15:53:16 -03:00
Changelog avformat: add DFPWM raw format 2022-03-10 14:11:12 +01:00
configure avcodec/zlib_wrapper: Add wrappers for zlib inflateInit, inflateEnd 2022-03-19 00:18:35 +01:00
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 avformat: add DFPWM raw format 2022-03-10 14:11:12 +01:00
Makefile Makefile: check config_components.h when comparing timestamps in component list files 2022-03-17 18:35:41 -03:00
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

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.