我已经搜索了一段时间，寻找一个可靠的 C#/.NET 的FFmpeg包装器。但我还没有找到有用的东西。我找到了以下三个项目，但它们似乎都停留在早期Alpha阶段。
FFmpeg.NET
ffmpeg-sharp
FFLIB.NET
因此我的问题是，是否有人知道更成熟的包装器项目？
我不需要一个完整的转码引擎，也不需要工作队列等功能。
只需要一个简单的包装器，这样我就不必调用命令行并解析控制台输出，而是可以进行方法调用并使用进度事件监听器。
请随意提及任何活跃的项目，即使它们仍处于早期阶段。
这是我的一个封装: https://github.com/AydinAdn/MediaToolkit
MediaToolkit能够:
比特率、帧率、分辨率/大小、宽高比和视频持续时间音频采样率DVD、DV、DV50、VCD、SVCD我会随着更新而更新，欢迎您使用它，您也可以使用Package Manager Console安装它。
PM> Install-Package MediaToolkit
尝试了几个封装库后，我选择了这个：FFmpeg 自动生成的 C#/.NET 和 Mono 不安全绑定。
它是 FFmpeg 命名空间中每个类的低级别互操作绑定。可能不如实际封装使用方便，但在我看来，如果您想要做非平凡的事情并且想在 .Net 中使用 FFmpeg，则它是最佳解决方案。
优点：
缺点：
注意：此线程是关于使用 FFmpeg API，但对于某些用例，最好仅使用 ffmpeg.exe 的 命令行界面。
我在一个ASP.NET / Windows服务 (.NET)应用程序中使用了FFmpeg。但最终我选择使用命令行而不是解析控制台。通过这种方式，我可以轻松地控制FFmpeg的更新，并在多个核心上运行多个转换。
试试这个，我想我可能写了一些简单的封装代码，可以供你使用。
http://jasonjano.wordpress.com/2010/02/09/a-simple-c-wrapper-for-ffmpeg/
Install-Package Xabe.FFmpeg
我正在尝试制作易于使用的跨平台FFmpeg包装器。IConversionResult result = await Conversion.ToMp4(Resources.MkvWithAudio, output).Start();
如果你想取得进步：
IConversion conversion = Conversion.ToMp4(Resources.MkvWithAudio, output);
conversion.OnProgress += (duration, length) => { currentProgress = duration; }
await conversion.Start();
我一直在研究同样的事情，最初使用了MediaToolKit（在另一个答案中提到），它非常适合转换，但现在我需要更强大的东西。
一个看起来成熟且仍然活跃的选择是： https://github.com/hudl/HudlFfmpeg 您可以在这里阅读更多信息： http://public.hudl.com/bits/archives/2014/08/15/announcing-hudlffmpeg-a-c-framework-to-make-ffmpeg-interaction-simple/
另一个选项，可能不适用于许多情况，是直接从您的c#代码调用exe： http://www.codeproject.com/Articles/774093/Another-FFmpeg-exe-Csharp-Wrapper
我正在尝试使用一个叫做MediaHandler Pro的ffmpeg包装库，来自http://www.mediasoftpro.com，目前看起来很有希望。
MediaHandler是否会作为一个进程生成ffmpeg.exe来完成其工作，还是有一个实际的P/Invoke库？ - Glenn Slayden给你... 这段代码大部分已经有两年以上的历史了，因此缺少很多异步操作，并且使用了过时的命名约定。在生产环境中运行了相当长的时间。 ~ JT
internal static class FFMpegArgUtils
{
public static string GetEncodeVideoFFMpegArgs(string sSourceFile, MP4Info objMp4Info, double nMbps, int iWidth, int iHeight, bool bIncludeAudio, string sOutputFile)
{
//Ensure file contains a video stream, otherwise this command will fail
if (objMp4Info != null && objMp4Info.VideoStreamCount == 0)
{
throw new Exception("FFMpegArgUtils::GetEncodeVideoFFMpegArgs - mp4 does not contain a video stream");
}
int iBitRateInKbps = (int)(nMbps * 1000);
StringBuilder sbArgs = new StringBuilder();
sbArgs.Append(" -y -threads 2 -i \"" + sSourceFile + "\" -strict -2 "); // 0 tells it to choose how many threads to use
if (bIncludeAudio == true)
{
//sbArgs.Append(" -acodec libmp3lame -ab 96k");
sbArgs.Append(" -acodec aac -ar 44100 -ab 96k");
}
else
{
sbArgs.Append(" -an");
}
sbArgs.Append(" -vcodec libx264 -level 41 -r 15 -crf 25 -g 15 -keyint_min 45 -bf 0");
//sbArgs.Append(" -vf pad=" + iWidth + ":" + iHeight + ":" + iVideoOffsetX + ":" + iVideoOffsetY);
sbArgs.Append(String.Format(" -vf \"scale=iw*min({0}/iw\\,{1}/ih):ih*min({0}/iw\\,{1}/ih),pad={0}:{1}:({0}-iw)/2:({1}-ih)/2\"",iWidth, iHeight));
//Output File
sbArgs.Append(" \"" + sOutputFile + "\"");
return sbArgs.ToString();
}
public static string GetEncodeAudioFFMpegArgs(string sSourceFile, string sOutputFile)
{
var args = String.Format(" -y -threads 2 -i \"{0}\" -strict -2 -acodec aac -ar 44100 -ab 96k -vn \"{1}\"", sSourceFile, sOutputFile);
return args;
//return GetEncodeVideoFFMpegArgs(sSourceFile, null, .2, 854, 480, true, sOutputFile);
//StringBuilder sbArgs = new StringBuilder();
//int iWidth = 854;
//int iHeight = 480;
//sbArgs.Append(" -y -i \"" + sSourceFile + "\" -strict -2 "); // 0 tells it to choose how many threads to use
//sbArgs.Append(" -acodec aac -ar 44100 -ab 96k");
//sbArgs.Append(" -vcodec libx264 -level 41 -r 15 -crf 25 -g 15 -keyint_min 45 -bf 0");
//sbArgs.Append(String.Format(" -vf \"scale=iw*min({0}/iw\\,{1}/ih):ih*min({0}/iw\\,{1}/ih),pad={0}:{1}:({0}-iw)/2:({1}-ih)/2\"", iWidth, iHeight));
//sbArgs.Append(" \"" + sOutputFile + "\"");
//return sbArgs.ToString();
}
}
internal class CreateEncodedVideoCommand : ConsoleCommandBase
{
public event ProgressEventHandler OnProgressEvent;
private string _sSourceFile;
private string _sOutputFolder;
private double _nMaxMbps;
public double BitrateInMbps
{
get { return _nMaxMbps; }
}
public int BitrateInKbps
{
get { return (int)Math.Round(_nMaxMbps * 1000); }
}
private int _iOutputWidth;
private int _iOutputHeight;
private bool _bIsConverting = false;
//private TimeSpan _tsDuration;
private double _nPercentageComplete;
private string _sOutputFile;
private string _sOutputFileName;
private bool _bAudioEnabled = true;
private string _sFFMpegPath;
private string _sExePath;
private string _sArgs;
private MP4Info _objSourceInfo;
private string _sOutputExt;
/// <summary>
/// Encodes an MP4 to the specs provided, quality is a value from 0 to 1
/// </summary>
/// <param name="nQuality">A value from 0 to 1</param>
///
public CreateEncodedVideoCommand(string sSourceFile, string sOutputFolder, string sFFMpegPath, double nMaxBitrateInMbps, MP4Info objSourceInfo, int iOutputWidth, int iOutputHeight, string sOutputExt)
{
_sSourceFile = sSourceFile;
_sOutputFolder = sOutputFolder;
_nMaxMbps = nMaxBitrateInMbps;
_objSourceInfo = objSourceInfo;
_iOutputWidth = iOutputWidth;
_iOutputHeight = iOutputHeight;
_sFFMpegPath = sFFMpegPath;
_sOutputExt = sOutputExt;
}
public void SetOutputFileName(string sOutputFileName)
{
_sOutputFileName = sOutputFileName;
}
public override void Execute()
{
try
{
_bIsConverting = false;
string sFileName = _sOutputFileName != null ? _sOutputFileName : Path.GetFileNameWithoutExtension(_sSourceFile) + "_" + _iOutputWidth + "." + _sOutputExt;
_sOutputFile = _sOutputFolder + "\\" + sFileName;
_sExePath = _sFFMpegPath;
_sArgs = FFMpegArgUtils.GetEncodeVideoFFMpegArgs(_sSourceFile, _objSourceInfo,_nMaxMbps, _iOutputWidth, _iOutputHeight, _bAudioEnabled, _sOutputFile);
InternalExecute(_sExePath, _sArgs);
}
catch (Exception objEx)
{
DispatchException(objEx);
}
}
public override string GetCommandInfo()
{
StringBuilder sbInfo = new StringBuilder();
sbInfo.AppendLine("CreateEncodeVideoCommand");
sbInfo.AppendLine("Exe: " + _sExePath);
sbInfo.AppendLine("Args: " + _sArgs);
sbInfo.AppendLine("[ConsoleOutput]");
sbInfo.Append(ConsoleOutput);
sbInfo.AppendLine("[ErrorOutput]");
sbInfo.Append(ErrorOutput);
return base.GetCommandInfo() + "\n" + sbInfo.ToString();
}
protected override void OnInternalCommandComplete(int iExitCode)
{
DispatchCommandComplete( iExitCode == 0 ? CommandResultType.Success : CommandResultType.Fail);
}
override protected void OnOutputRecieved(object sender, ProcessOutputEventArgs objArgs)
{
//FMPEG out always shows as Error
base.OnOutputRecieved(sender, objArgs);
if (_bIsConverting == false && objArgs.Data.StartsWith("Press [q] to stop encoding") == true)
{
_bIsConverting = true;
}
else if (_bIsConverting == true && objArgs.Data.StartsWith("frame=") == true)
{
//Capture Progress
UpdateProgressFromOutputLine(objArgs.Data);
}
else if (_bIsConverting == true && _nPercentageComplete > .8 && objArgs.Data.StartsWith("frame=") == false)
{
UpdateProgress(1);
_bIsConverting = false;
}
}
override protected void OnProcessExit(object sender, ProcessExitedEventArgs args)
{
_bIsConverting = false;
base.OnProcessExit(sender, args);
}
override public void Abort()
{
if (_objCurrentProcessRunner != null)
{
//_objCurrentProcessRunner.SendLineToInputStream("q");
_objCurrentProcessRunner.Dispose();
}
}
#region Helpers
//private void CaptureSourceDetailsFromOutput()
//{
// String sInputStreamInfoStartLine = _colErrorLines.SingleOrDefault(o => o.StartsWith("Input #0"));
// int iStreamInfoStartIndex = _colErrorLines.IndexOf(sInputStreamInfoStartLine);
// if (iStreamInfoStartIndex >= 0)
// {
// string sDurationInfoLine = _colErrorLines[iStreamInfoStartIndex + 1];
// string sDurantionTime = sDurationInfoLine.Substring(12, 11);
// _tsDuration = VideoUtils.GetDurationFromFFMpegDurationString(sDurantionTime);
// }
//}
private void UpdateProgressFromOutputLine(string sOutputLine)
{
int iTimeIndex = sOutputLine.IndexOf("time=");
int iBitrateIndex = sOutputLine.IndexOf(" bitrate=");
string sCurrentTime = sOutputLine.Substring(iTimeIndex + 5, iBitrateIndex - iTimeIndex - 5);
double nCurrentTimeInSeconds = double.Parse(sCurrentTime);
double nPercentageComplete = nCurrentTimeInSeconds / _objSourceInfo.Duration.TotalSeconds;
UpdateProgress(nPercentageComplete);
//Console.WriteLine("Progress: " + _nPercentageComplete);
}
private void UpdateProgress(double nPercentageComplete)
{
_nPercentageComplete = nPercentageComplete;
if (OnProgressEvent != null)
{
OnProgressEvent(this, new ProgressEventArgs( _nPercentageComplete));
}
}
#endregion
//public TimeSpan Duration { get { return _tsDuration; } }
public double Progress { get { return _nPercentageComplete; } }
public string OutputFile { get { return _sOutputFile; } }
public bool AudioEnabled
{
get { return _bAudioEnabled; }
set { _bAudioEnabled = value; }
}
}
public abstract class ConsoleCommandBase : CommandBase, ICommand
{
protected ProcessRunner _objCurrentProcessRunner;
protected List<String> _colOutputLines;
protected List<String> _colErrorLines;
private int _iExitCode;
public ConsoleCommandBase()
{
_colOutputLines = new List<string>();
_colErrorLines = new List<string>();
}
protected void InternalExecute(string sExePath, string sArgs)
{
InternalExecute(sExePath, sArgs, null, null, null);
}
protected void InternalExecute(string sExePath, string sArgs, string sDomain, string sUsername, string sPassword)
{
try
{
if (_objCurrentProcessRunner == null || _bIsRunning == false)
{
StringReader objStringReader = new StringReader(string.Empty);
_objCurrentProcessRunner = new ProcessRunner(sExePath, sArgs);
_objCurrentProcessRunner.SetCredentials(sDomain, sUsername, sPassword);
_objCurrentProcessRunner.OutputReceived += new ProcessOutputEventHandler(OnOutputRecieved);
_objCurrentProcessRunner.ProcessExited += new ProcessExitedEventHandler(OnProcessExit);
_objCurrentProcessRunner.Run();
_bIsRunning = true;
_bIsComplete = false;
}
else
{
DispatchException(new Exception("Processor Already Running"));
}
}
catch (Exception objEx)
{
DispatchException(objEx);
}
}
protected virtual void OnOutputRecieved(object sender, ProcessOutputEventArgs args)
{
try
{
if (args.Error == true)
{
_colErrorLines.Add(args.Data);
//Console.WriteLine("Error: " + args.Data);
}
else
{
_colOutputLines.Add(args.Data);
//Console.WriteLine(args.Data);
}
}
catch (Exception objEx)
{
DispatchException(objEx);
}
}
protected virtual void OnProcessExit(object sender, ProcessExitedEventArgs args)
{
try
{
Console.Write(ConsoleOutput);
_iExitCode = args.ExitCode;
_bIsRunning = false;
_bIsComplete = true;
//Some commands actually fail to succeed
//if(args.ExitCode != 0)
//{
// DispatchException(new Exception("Command Failed: " + this.GetType().Name + "\nConsole: " + ConsoleOutput + "\nConsoleError: " + ErrorOutput));
//}
OnInternalCommandComplete(_iExitCode);
if (_objCurrentProcessRunner != null)
{
_objCurrentProcessRunner.Dispose();
_objCurrentProcessRunner = null;
}
}
catch (Exception objEx)
{
DispatchException(objEx);
}
}
abstract protected void OnInternalCommandComplete(int iExitCode);
protected string JoinLines(List<String> colLines)
{
StringBuilder sbOutput = new StringBuilder();
colLines.ForEach( o => sbOutput.AppendLine(o));
return sbOutput.ToString();
}
#region Properties
public int ExitCode
{
get { return _iExitCode; }
}
#endregion
public override string GetCommandInfo()
{
StringBuilder sbCommandInfo = new StringBuilder();
sbCommandInfo.AppendLine("Command: " + this.GetType().Name);
sbCommandInfo.AppendLine("Console Output");
if (_colOutputLines != null)
{
foreach (string sOutputLine in _colOutputLines)
{
sbCommandInfo.AppendLine("\t" + sOutputLine);
}
}
sbCommandInfo.AppendLine("Error Output");
if (_colErrorLines != null)
{
foreach (string sErrorLine in _colErrorLines)
{
sbCommandInfo.AppendLine("\t" + sErrorLine);
}
}
return sbCommandInfo.ToString();
}
public String ConsoleOutput { get { return JoinLines(_colOutputLines); } }
public String ErrorOutput { get { return JoinLines(_colErrorLines);} }
}
CommandBase : ICommand
{
protected IDedooseContext _context;
protected Boolean _bIsRunning = false;
protected Boolean _bIsComplete = false;
#region Custom Events
public event CommandCompleteEventHandler OnCommandComplete;
event CommandCompleteEventHandler ICommand.OnCommandComplete
{
add { if (OnCommandComplete != null) { lock (OnCommandComplete) { OnCommandComplete += value; } } else { OnCommandComplete = new CommandCompleteEventHandler(value); } }
remove { if (OnCommandComplete != null) { lock (OnCommandComplete) { OnCommandComplete -= value; } } }
}
public event UnhandledExceptionEventHandler OnCommandException;
event UnhandledExceptionEventHandler ICommand.OnCommandException
{
add { if (OnCommandException != null) { lock (OnCommandException) { OnCommandException += value; } } else { OnCommandException = new UnhandledExceptionEventHandler(value); } }
remove { if (OnCommandException != null) { lock (OnCommandException) { OnCommandException -= value; } } }
}
public event ProgressEventHandler OnProgressUpdate;
event ProgressEventHandler ICommand.OnProgressUpdate
{
add { if (OnProgressUpdate != null) { lock (OnProgressUpdate) { OnProgressUpdate += value; } } else { OnProgressUpdate = new ProgressEventHandler(value); } }
remove { if (OnProgressUpdate != null) { lock (OnProgressUpdate) { OnProgressUpdate -= value; } } }
}
#endregion
protected CommandBase()
{
_context = UnityGlobalContainer.Instance.Context;
}
protected void DispatchCommandComplete(CommandResultType enResult)
{
if (enResult == CommandResultType.Fail)
{
StringBuilder sbMessage = new StringBuilder();
sbMessage.AppendLine("Command Commpleted with Failure: " + this.GetType().Name);
sbMessage.Append(GetCommandInfo());
Exception objEx = new Exception(sbMessage.ToString());
DispatchException(objEx);
}
else
{
if (OnCommandComplete != null)
{
OnCommandComplete(this, new CommandCompleteEventArgs(enResult));
}
}
}
protected void DispatchException(Exception objEx)
{
if (OnCommandException != null)
{
OnCommandException(this, new UnhandledExceptionEventArgs(objEx, true));
}
else
{
_context.Logger.LogException(objEx, MethodBase.GetCurrentMethod());
throw objEx;
}
}
protected void DispatchProgressUpdate(double nProgressRatio)
{
if (OnProgressUpdate != null) { OnProgressUpdate(this, new ProgressEventArgs(nProgressRatio)); }
}
public virtual string GetCommandInfo()
{
return "Not Implemented: " + this.GetType().Name;
}
public virtual void Execute() { throw new NotImplementedException(); }
public virtual void Abort() { throw new NotImplementedException(); }
public Boolean IsRunning { get { return _bIsRunning; } }
public Boolean IsComplete { get { return _bIsComplete; } }
public double GetProgressRatio()
{
throw new NotImplementedException();
}
}
public delegate void CommandCompleteEventHandler(object sender, CommandCompleteEventArgs e);
public interface ICommand
{
event CommandCompleteEventHandler OnCommandComplete;
event UnhandledExceptionEventHandler OnCommandException;
event ProgressEventHandler OnProgressUpdate;
double GetProgressRatio();
string GetCommandInfo();
void Execute();
void Abort();
}
// 如果需要处理运行程序，请查找Roger Knapp的ProcessRunner
string result = String.Empty;
StreamReader srOutput = null;
var oInfo = new ProcessStartInfo(exePath, parameters)
{
UseShellExecute = false,
CreateNoWindow = true,
RedirectStandardOutput = true,
RedirectStandardError = true
};
var output = string.Empty;
try
{
Process process = System.Diagnostics.Process.Start(oInfo);
output = process.StandardError.ReadToEnd();
process.WaitForExit();
process.Close();
}
catch (Exception)
{
output = string.Empty;
}
return output;
这个包装器不会让方法陷入循环中。 试试这个，对我有用。