适用于 C#/.NET 的可靠 FFmpeg 包装器

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9 个月前已关闭。

Answer 1

在尝试了几个包装器之后，我选择了这个： FFmpeg auto generated unsafe bindings for C#/.NET and Mono< /a>.

它是 FFmpeg 命名空间中每个类的一组低级互操作绑定。
也许不像实际的包装器那样方便使用，但在我看来，如果您想做一些重要的事情，它是在 .Net 中使用 FFmpeg 的最佳解决方案。

优点：

• 工作
• 值得信赖 - 假设您信任 FFMpeg 本身，则没有 3rd 方包装器代码会引入错误。
• 它始终更新到最新版本的 FFmpeg
• 对于所有绑定
• XML， Single nuget 包包含文档，但您仍然可以使用在线文档 FFmpeg 文档。

缺点：

• 低级别：您必须知道如何使用指向c 结构的指针。
• 最初需要一些工作才能使其正常工作。我建议学习官方示例。

注意：这个线程是关于使用 FFmpeg API 的，但对于某些用例，最好简单地使用 ffmpeg.exe 的 命令行界面。

Answer 2

我在 ASP.NET / Windows 服务 (.NET) 应用程序中使用了 FFmpeg。
但我最终使用了命令行，没有解析控制台。
通过使用这个 - 我有一个简单的方法来控制 - FFmpeg 的更新并在多个内核上运行多个转换。

Answer 3

试试这个，我想我可能已经写了一些可以用于简单包装的东西。

http://jasonjano.wordpress.com/ 2010/02/09/a-simple-c-wrapper-for-ffmpeg/

Answer 4

您可以使用这个 nuget 包：

我知道您询问了成熟项目，但我还没有看到任何项目满足我的期望，所以我决定制作自己的项目。
您可以轻松地将转换排队并并行运行，将媒体转换为不同格式的方法，将您自己的参数发送到 ffmpeg 并解析 ffmpeg + 事件侦听器的输出以及当前进度。

Install-Package Xabe.FFmpeg

我正在尝试制作易于使用的跨平台 FFmpeg 包装器。

相关信息

您可以在 https://xabe.net/product/xabe_ffmpeg/ 找到更多 此处的信息：https://xabe.net/product/xabe_ffmpeg/#documentation

转换为简单：

IConversionResult result = await Conversion.ToMp4(Resources.MkvWithAudio, output).Start();

如果你想要进步：

IConversion conversion = Conversion.ToMp4(Resources.MkvWithAudio, output);
conversion.OnProgress += (duration, length) => { currentProgress = duration; } 
await conversion.Start();

Answer 5

我正在玩一个名为 MediaHandler Pro 的 ffmpeg 包装库，来自

http://www.mediasoftpro.com

似乎很有前途迄今为止。

Answer 6

我一直在研究同样的事情，最初使用 MediaToolKit （在另一个答案中提到），它对于转换非常有用，但现在我需要更强大的东西。

一种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相关信息：
http://public.hudl.com/bits/archives/2014/08/15/announcing-hudlffmpeg-ac-framework-to-make-ffmpeg-interaction-simple/

另一种选择，可能不适合很多人情况下，是直接从您的 C# 代码调用 exe：
http://www.codeproject.com/Articles/774093/Another -FFmpeg-exe-Csharp-Wrapper

Answer 7

这里还有另一个简单的： http://ivolo.mit.edu/post/Metamorph-Convert-Audio-Video-to-Any-Format-on-Windows-Linux-and-Mac.aspx

Answer 8

开始吧...大部分代码都有 2 年多的历史了，因此缺少很多异步内容，并且使用了过时的命名约定。在生产环境运行相当长一段时间
~ 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();
    }

// 有关流程运行程序的内容，请查找 Roger Knapp 的 ProcessRunner

Answer 9

        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。
试试这个，它对我有用。

Answer 10

请参阅适用于 C#/.NET 和 Mono 的自动生成的 FFmpeg 包装器，这是一个很棒的项目，看起来像唯一真正、完整的 FFmpeg 互操作 .NET 包装器。

Answer 11

我从 codeplex 分叉了 FFPMEG.net。

仍在积极开展工作。

https://github.com/spoiledtechie/FFMpeg.Net

它不使用 dll，而是exe。所以它往往会更加稳定。

Answer 12

这是我自己的包装： https://github.com/AydinAdn/MediaToolkit

MediaToolkit 可以：

• 将视频文件转换为各种其他格式视频格式。
• 执行视频转码任务。
  • 可配置选项：比特率、帧速率、分辨率/大小、宽高比、视频时长
• 执行音频转码任务。
  • 可配置选项：音频采样率
• 使用 FILM、PAL 或 NTSC 电视标准将视频转换为物理格式
  • 媒体包括：DVD、DV、DV50、VCD、SVCD

我正在不断更新它，欢迎您使用它，您也可以使用包管理器控制台安装它。

PM> Install-Package MediaToolkit