（C＃/ VB FFMPEG Wrapper）如何解析视频到音频的进度？

问题描述

我试图尽可能多地具体化。

我搜索了很多，为FFMPEG找到了一个好的.net包装器，最好的是

我使用VB.net非常糟糕，问题是我想在C＃项目中使用这个库，但是我无法将我从VB.net找到的示例程序正确地转换为C＃。

所以，我编辑了我的C＃应用​​程序，所以它将输入视频文件路径写入一个临时的.txt文件，然后运行转换器在VB中）！

我的转换器的代码：

  Imports系统
导入System.IO 
 
公共类Form1 
公共WithEvents MediaConverter作为新的FFLib.Encoder 
 
私有子ConOut（ByVal prog As String ，ByVal tl As String）处理MediaConverter.Progress 
 OperationPrgrss.Value = prog 
 Application.DoEvents（）
 End Sub 
 
 Private Sub stat（ByVal status）处理MediaConverter.Status 
 StatusLbl.Text = status 
 Application.DoEvents（）
 End Sub 
 
 Private Sub Form1_Load（sender As Object，e As EventArgs）处理MyBase.Load 
尝试
使用PathFinder作为新的StreamReader（_ temp.txt） 
 Dim SrcPath As String 
 SrcPath = PathFinder.ReadLine（）
 PathTxtBox.Text = SrcPath 
结束使用
 Catch ex As Exception 
 MessageBox.Show 无法读取文件：&环境新闻ex.Message）
结束尝试
 End Sub 
 
 
私有子Form1_Shown（发件人作为对象，作为EventArgs）处理MyBase.Shown 
 MediaGenerator。 RunWorkerAsync（）
 End Sub 
 
 Private Sub MediaGenerator_DoWork（sender As Object，e As ComponentModel.DoWorkEventArgs）处理MediaGenerator.DoWork 
 MediaConverter.OverWrite = False 
 MediaConverter。 SourceFile = PathTxtBox.Text 
 MediaConverter.Format = MediaConverter.Format_MP3 
 MediaConverter.AudioCodec = MediaConverter.AudioCodec_mp3 
 MediaConverter.Video_Codec = MediaConverter.Vcodec_NONE 
 
 MediaConverter.Threads = 0 
 MediaConverter.OverWrite = True 
 
 Dim OutputFldr As String = AppDomain.CurrentDomain.BaseDirectory& MP3Files\\\
 MediaConverter.OutputPath = OutputFldr 
 MediaConverter.AnalyzeFile（）
 
 MediaConverter.Encode（）
 End Sub 
结束类
  

我想要做的是转换视频文件[有时它是WEBM，FLV，MP4或3GP]，
和上述代码成功，但问题是使用时：

  MediaConverter.Video_Codec = MediaConverter.Vcodec_NONE 
  

进度条不起作用，值为0！
&当我使用任何视频编解码器，它的工作原理完美[进度条]，但创建的MP3文件将无法与任何媒体播放器，或在智能手机和电视等..

...

那么问题是什么？我该怎么解决呢？
我尝试了很多改变包装库源代码中的一些功能，但正如我之前提到的...我只是一个新手@ VB.net：\

解决方案

获取FFMpeg进展的最简单的方法是解析其控制台输出。
我写了免费和易于使用的FFMpeg包装器有进度事件：

  var conv = new NReco.VideoConverter.FFMpegConverter（）; 
 conv.ConvertProgress + =（o，args）=> {
 Console.WriteLine（String.Format（Progress：{0} / {1} \r\\\
，args.Processed，args.TotalDuration）; 
}; 
 conv.ConvertMedia（inputFile1，outFile，flv）; 
  

I'd try to become specific as much as I can .

I searched a lot to find a good .net wrapper for FFMPEG, the best was VB FFmpeg Wrapper

I'm so bad at using VB.net, and the problem was that I want to use this library in a C# project but I couldn't convert the example program I found from VB.net to C# correctly .

So, I've edited my C# application, so it writes input video file path to a temporary .txt file .. then run the "Converter" ( Which is written in VB ) !

The code of my "Converter" :

Imports System
Imports System.IO

Public Class Form1
    Public WithEvents MediaConverter As New FFLib.Encoder

    Private Sub ConOut(ByVal prog As String, ByVal tl As String) Handles MediaConverter.Progress
        OperationPrgrss.Value = prog
        Application.DoEvents()
    End Sub

    Private Sub stat(ByVal status) Handles MediaConverter.Status
        StatusLbl.Text = status
        Application.DoEvents()
    End Sub

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Try
            Using PathFinder As New StreamReader("_temp.txt")
                Dim SrcPath As String
                SrcPath = PathFinder.ReadLine()
                PathTxtBox.Text = SrcPath
            End Using
        Catch ex As Exception
            MessageBox.Show("The file couldn't be read : " & Environment.NewLine & ex.Message)
        End Try
    End Sub


    Private Sub Form1_Shown(sender As Object, e As EventArgs) Handles MyBase.Shown
        MediaGenerator.RunWorkerAsync()
    End Sub

    Private Sub MediaGenerator_DoWork(sender As Object, e As ComponentModel.DoWorkEventArgs) Handles MediaGenerator.DoWork
        MediaConverter.OverWrite = False
        MediaConverter.SourceFile = PathTxtBox.Text
        MediaConverter.Format = MediaConverter.Format_MP3
        MediaConverter.AudioCodec = MediaConverter.AudioCodec_mp3
        MediaConverter.Video_Codec = MediaConverter.Vcodec_NONE

        MediaConverter.Threads = 0
        MediaConverter.OverWrite = True

        Dim OutputFldr As String = AppDomain.CurrentDomain.BaseDirectory & "MP3Files\\"
        MediaConverter.OutputPath = OutputFldr
        MediaConverter.AnalyzeFile()

        MediaConverter.Encode()
    End Sub
End Class

What I'm trying to do is converting a video file [ sometime it's WEBM, FLV, MP4 or 3GP ],and the above code does it successfully, but the problem is when using :

MediaConverter.Video_Codec = MediaConverter.Vcodec_NONE

the progress bar doesn't work, it's value remains 0 !& When I use any Video codec it works perfectly [ the progress bar ], but the created MP3 file won't work ever with any media player, or in Smartphone & Tv's .. etc ;

...

So, what's the problem ?! and how can I solve it ?I tried a lot to change some functions in the wrapper library source, but as I mentioned before ... I'm just a newbie @ VB.net :\

解决方案

The simplest way to get progress of FFMpeg is parsing its console output.I've written free and easy-to-use FFMpeg wrapper Video Converter .NET that has progress event for that:

var conv = new NReco.VideoConverter.FFMpegConverter();
conv.ConvertProgress += (o, args) => {
    Console.WriteLine( String.Format("Progress: {0} / {1}\r\n", args.Processed, args.TotalDuration );
};
conv.ConvertMedia(inputFile1, outFile, "flv");

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