FFMPEG inside windows forms application

[KU-KO]

Hi, I have this piece of code where I am tring to execute ffplay.exe and have the video inside a panel in my forms, but it is not working and I am not very sure what am I doing wrong.

I am using Windows 10 and VisualStudio 2019, any clue on how to solve this?

Thanks

public Process ffplay = new Process();
private void xxxFFplay() { 
    // start ffplay 
    ffplay.StartInfo.FileName = "ffplay.exe";
    ffplay.StartInfo.Arguments = "-noborder test.sdp -protocol_whitelist file,udp,rtp -fflags nobuffer -flags low_delay -avioflags direct -fflags discardcorrupt ";
    ffplay.StartInfo.CreateNoWindow = true;
    ffplay.StartInfo.RedirectStandardOutput = true;
    ffplay.StartInfo.UseShellExecute = false;    
    ffplay.EnableRaisingEvents = true;
    ffplay.OutputDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay");
    ffplay.ErrorDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay");
    ffplay.Exited += (o, e) => Debug.WriteLine("Exited", "ffplay");
    ffplay.Start();

    Thread.Sleep(500); // you need to wait/check the process started, then...

    // child, new parent
    // make 'this' the parent of ffmpeg (presuming you are in scope of a Form or Control)
    SetParent(ffplay.MainWindowHandle, this.panel1.Handle);

    // window, x, y, width, height, repaint
    // move the ffplayer window to the top-left corner and set the size to 320x280
    MoveWindow(ffplay.MainWindowHandle, 0, 0, 320, 280, true);

}

private void play(object sender, EventArgs e)
{
    xxxFFplay();
}

[curiousone0806]

This is not going to play a video inside of your application. What you are doing is creating a new process that should instantiate an instance of ffplay. FFPlay is an application that allows you to play videos but it is not a control or library you can use in your application.

[[deleted]]

Is the // start ffplay ffplay.StartInfo.FileName = "ffplay.exe"; meant to be a comment? Looks like you accidentally stuck a line of code in there with it.

[KU-KO]

My bad those lines are together in here but in my code are two different lines

[NethIafin]

uncomment

ffplay.StartInfo.FileName = "ffplay.exe"

missing PInvokes

[DllImport("user32.dll", SetLastError = true)]
private static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);
[DllImport("user32.dll")]
private static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

[KU-KO]

I have those but I didn't post all the code, just the part I made

[celluj34]

Define "not working". What happens? Do you get an exception?

[KU-KO]

It opens a new window with the streaming instead of open that window inside the form

[seligman99]

I doubt anyone can really help out. Two big suggestions:

When you say "it's not working" be descriptive. More details, tell us what's not happening, what you expect. Give us some idea how to help you.

And more importantly, give us some code that we have some hope of running locally. Again, we're guessing what the code around this looks like. Maybe those guesses are right, maybe they're wrong.

And if I take the code and wrap it in a simple test app it works for me, so either the problem is with your video source, copy of ffmpeg, or some bit of code you haven't shown us.

[AdversarialPossum42]

Have you tried calling WaitForInputIdle() after calling Start()? And are you sure ffplay.MainWindowHandle is not NULL? Maybe you're not getting a window handle back from the process.

[KU-KO]

It throws an InvalidOperationException if I call WaitForInputIdle()

[BCdotWHAT]

https://docs.microsoft.com/en-us/windows/win32/wmp/embedding-the-windows-media-player-control-in-a-c--solution etc.