时间：2021-12-14 10:42:52 | 栏目：.NET代码 | 点击：次
FFmpeg 是一套可以用来记录、转换数字音频、视频，并能将其转化为流的开源计算机程序。采用 LGPL 或 GPL 许可证。它提供了录制、转换以及流化音视频的完整解决方案。它包含了非常先进的音频/视频编解码库 libavcodec，为了保证高可移植性和编解码质量，libavcodec 里很多 code 都是从头开发的。
这篇文章主要介绍如何在 C# 中使用 FFmpeg。
在项目中使用包管理器控制台安装 nuget 包：
PM> Install-Package xFFmpeg.NET
var inputFile = new MediaFile (@"C:\Path\To_Video.flv");
var outputFile = new MediaFile (@"C:\Path\To_Save_Image.jpg");
var ffmpeg = new Engine("C:\\ffmpeg\\ffmpeg.exe");
// 保存位于视频第 15 秒的帧。
var options = new ConversionOptions { Seek = TimeSpan.FromSeconds(15) };
await ffmpeg.GetThumbnailAsync(inputFile, outputFile, options);
var inputFile = new MediaFile (@"C:\Path\To_Video.flv");
var ffmpeg = new Engine("C:\\ffmpeg\\ffmpeg.exe");
var metadata = await ffmpeg.GetMetadataAsync(inputFile);
Console.WriteLine(metadata.Duration);
var inputFile = new MediaFile (@"C:\Path\To_Video.flv");
var outputFile = new MediaFile (@"C:\Path\To_Save_New_Video.mp4");
var ffmpeg = new Engine("C:\\ffmpeg\\ffmpeg.exe");
await ffmpeg.ConvertAsync(inputFile, outputFile);
var inputFile = new MediaFile (@"C:\Path\To_Video.flv");
var outputFile = new MediaFile (@"C:\Path\To_Save_New_DVD.vob");
var conversionOptions = new ConversionOptions
{
Target = Target.DVD,
TargetStandard = TargetStandard.PAL
};
var ffmpeg = new Engine("C:\\ffmpeg\\ffmpeg.exe");
await ffmpeg.ConvertAsync(inputFile, outputFile, conversionOptions);
var inputFile = new MediaFile (@"C:\Path\To_Video.flv");
var outputFile = new MediaFile (@"C:\Path\To_Save_New_Video.mp4");
var conversionOptions = new ConversionOptions
{
MaxVideoDuration = TimeSpan.FromSeconds(30),
VideoAspectRatio = VideoAspectRatio.R16_9,
VideoSize = VideoSize.Hd1080,
AudioSampleRate = AudioSampleRate.Hz44100
};
var ffmpeg = new Engine("C:\\ffmpeg\\ffmpeg.exe");
await ffmpeg.ConvertAsync(inputFile, outputFile, conversionOptions);
var inputFile = new MediaFile (@"C:\Path\To_Video.flv");
var outputFile = new MediaFile (@"C:\Path\To_Save_ExtractedVideo.flv");
var ffmpeg = new Engine("C:\\ffmpeg\\ffmpeg.exe");
var options = new ConversionOptions();
options.CutMedia(TimeSpan.FromSeconds(30), TimeSpan.FromSeconds(25));
await ffmpeg.ConvertAsync(inputFile, outputFile, options);
以上就是 FFmpeg.NET 类库才常用操作。