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Marton Balint 64834bb86a avformat: introduce AVFormatContext io_close2 which returns an int
Otherwise there is no way to detect an error returned by avio_close() because
ff_format_io_close cannot get the return value.

Checking the return value of the close function is important in order to check
if all data was successfully written and the underlying close() operation was
successful.

It can also be useful even for read mode because it can return any pending
AVIOContext error, so the user don't have to manually check AVIOContext->error.

In order to still support if the user overrides io_close, the generic code only
uses io_close2 if io_close is either NULL or the default io_close callback.

Signed-off-by: Marton Balint <cus@passwd.hu>
2021-12-12 00:32:20 +01:00
compat Replace all occurences of av_mallocz_array() by av_calloc() 2021-09-20 01:03:52 +02:00
doc avformat: introduce AVFormatContext io_close2 which returns an int 2021-12-12 00:32:20 +01:00
ffbuild avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
fftools fftools/ffmpeg: close output files before cleanup 2021-12-12 00:32:20 +01:00
libavcodec avcodec/movtextenc: Check for existence of font name before using it 2021-12-11 17:15:38 +01:00
libavdevice lavd/v4l2: detect device name truncation 2021-12-07 11:16:14 +01:00
libavfilter avfilter/vf_transpose_vulkan: simplify config_props_output function 2021-12-10 20:50:13 +01:00
libavformat avformat: introduce AVFormatContext io_close2 which returns an int 2021-12-12 00:32:20 +01:00
libavutil hwcontext_vulkan: wait on semaphores when exporting to DRM 2021-12-10 17:16:49 +01:00
libpostproc libpostproc/postprocess_template: Don't reimplement FFSWAP 2021-10-02 17:13:42 +02:00
libswresample libswresample/swresamplec: Err num(negative-size) was used as a function parameter 2021-12-09 13:12:45 +01:00
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CONTRIBUTING.md
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CREDITS
Changelog Changelog: update with recent Vulkan filter additions 2021-12-02 11:08:58 +01:00
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: add a transpose_vulkan filter 2021-12-10 16:48:20 +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.