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Mark Thompson a444863738 ffmpeg_hw: Treat empty device string as no device setting 
The implementation will use some default in this case.  The empty string
is not a meaningful device for any existing hardware type, and indeed
OpenCL treats it identically to no device already to work around the lack
of this setting on the command line.
2019-06-02 22:58:22 +01:00
compat compat/cuda/ptx2c: don't drop final newline 2019-05-24 19:23:39 +02:00
doc doc/indevs: Add example using cropping to capture part of a plane 2019-06-02 17:30:41 +01:00
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fftools ffmpeg_hw: Treat empty device string as no device setting 2019-06-02 22:58:22 +01:00
libavcodec vaapi_encode: Warn if input has cropping information 2019-06-02 17:30:41 +01:00
libavdevice libavdevice/gdigrab: fix ffmpeg -devices doesn't show gdigrab 2019-05-17 21:51:20 +08:00
libavfilter vf_scale_vaapi: Add options to configure output colour properties 2019-06-02 17:30:41 +01:00
libavformat doc/muxers: fix typo of the hls var_stream_map example 2019-06-02 21:53:11 +08:00
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libavutil avutil/dynarry.h: fix comment grammar mistakes of FF_DYNARRAY_ADD 2019-06-01 17:43:48 +08:00
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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.