# FFME

**Repository Path**: arnojin_arno/ffme

## Basic Information

- **Project Name**: FFME
- **Description**: FFME:  The Advanced WPF MediaElement Alternative.

Fork From https://github.com/unosquare/ffmediaelement.git
- **Primary Language**: C#
- **License**: MS-PL
- **Default Branch**: arnojin
- **Homepage**: https://github.com/unosquare/ffmediaelement.git
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-02-27
- **Last Updated**: 2024-05-29

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# FFME: The Advanced WPF MediaElement Alternative.

## 项目说明

基于 [FFmpeg](https://gitee.com/mirrors/ffmpeg), [FFmpeg.AutoGen](https://github.com/Ruslan-B/FFmpeg.AutoGen) 使用 C# [.NET 5](https://docs.microsoft.com/en-us/dotnet/core/dotnet-five) WPF 开发的媒体播放器，内建库可以替代 [MediaElement 类](https://docs.microsoft.com/zh-cn/dotnet/api/system.windows.controls.mediaelement?view=net-5.0)

项目 Fork From GitHub [FFMediaelEment](https://github.com/unosquare/ffmediaelement.git)

通过VS2019使用该库参见：[Quick Usage Guide for WPF Apps](README.md)

参考文章：[FFmpeg](https://gitee.com/arnojin_arno/article#ffmpeg)

## 修改记录

* 2021-02-27 增加项目说明文件

## 备注

1. Initializes the input context to start read operations.

    ffmpeg.av_find_input_format()
1. Create the input format context, and open the input based on the provided format options.

    ffmpeg.av_dict_set(), ffmpeg.av_dict_get(), ffmpeg.av_dict_free(), ffmpeg.av_dict_count()
1. Create the input context
    
    ffmpeg.avformat_alloc_context()
1. Open the input and pass the private options dictionary

    ffmpeg.avformat_open_input()
1. This function will cause global side data to be injected in the next packet of
    each stream as well as after any subsequent seek.
ffmpeg.av_format_inject_global_side_data()
1. This is useful for file formats with no headers such as MPEG.
   This function also computes the real frame-rate in case of MPEG-2 repeat frame mode.

    ffmpeg.avformat_find_stream_info()
1. [Initializes a new instance of the CodecContext.](https://github.com/FFmpeg/FFmpeg/blob/master/fftools/ffplay.c#L2559)

    ffmpeg.avcodec_alloc_context3()
1. Set default codec context options from probed stream

    ffmpeg.avcodec_copy_context(), ffmpeg.avcodec_parameters_to_context()
1. We set the packet timebase in the same timebase as the stream as opposed to the typical AV_TIME_BASE

    ffmpeg.av_d2q();
1. Find the default decoder codec from the stream and set it.

    ffmpeg.avcodec_find_decoder()

11. If set, change the codec to the forced codec.

    ffmpeg.avcodec_find_decoder_by_name()

12. Check we have a valid codec to open and process the stream.

    ffmpeg.avcodec_free_context()

13. Open the CodecContext. This requires exclusive FFmpeg access

    ffmpeg.avcodec_open2()