README.md · 夏楚/FFmpeg

## 修改说明
本分支基于FFmpeg官方2020/7/14的源码修改，主要添加了rtmp对H265/opus的支持，其中H265的支持源自[金山云](https://github.com/ksvc/FFmpeg/wiki), 我只是做了最新FFmpeg代码的适配，rtmp对opus的支持(codec id定义为13)由本人实现，目前我已经测试通过，功能完全正常。

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](https://ffmpeg.org/ffmpeg.html) is a command line toolbox to
  manipulate, convert and stream multimedia content.
* [ffplay](https://ffmpeg.org/ffplay.html) is a minimalistic multimedia player.
* [ffprobe](https://ffmpeg.org/ffprobe.html) 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](https://ffmpeg.org)
and in the [wiki](https://trac.ffmpeg.org).

### 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.

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