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• How to correctly close a console application using the youtube-dl process to download Twitch stream whenever I want

  24 juin 2023, par ElPavlillo

  The test program has the following code :

  


  string url = "https://www.twitch.tv/ricoy";
string outputPath = @"D:\ruta_del_archivo_salida.mp4";

ProcessStartInfo startInfo = new ProcessStartInfo
{
    FileName = "youtube-dl",
    Arguments = $"-f best -o \"{outputPath}\" \"{url}\"",
    //RedirectStandardOutput = true,
    UseShellExecute = false,
    CreateNoWindow = true
};

using (Process process = new Process())
{
    process.StartInfo = startInfo;
    process.Start();

    //var output = process.StandardOutput.ReadToEnd();
    //process.WaitForExit();

    Console.Read();
    KillProcessAndChildren(process.Id);
}

static void KillProcessAndChildren(int pid)
{
    // Cannot close 'system idle process'.
    if (pid == 0)
    {
        return;
    }
    ManagementObjectSearcher searcher = new ManagementObjectSearcher
            ("Select * From Win32_Process Where ParentProcessID=" + pid);
    ManagementObjectCollection moc = searcher.Get();
    foreach (ManagementObject mo in moc)
    {
        KillProcessAndChildren(Convert.ToInt32(mo["ProcessID"]));
    }
    try
    {
        Process proc = Process.GetProcessById(pid);
        proc.Kill();
    }
    catch (ArgumentException)
    {
        // Process already exited.
    }
}


  


  The problem is that when I press de key in the console the youtube-dl process gets kill and also de ffmpeg but the file is left with .part extension and does not work.

  


  I was expecting the code to left a .mp4 file but for reason it does not.

  


• ffmpeg split video H264 stutters on Windows Media Player

  9 mars 2019, par Juan Foegen

  I am converting and splitting wmv and mp4 into new mp4 files. I am using ffmpeg to do the conversion with simply :
  ffmpeg -i inputfile.wmv -vcodec libx264 -ss 00:00:10 -t 00:00:15 outputfile.mp4

  So when I create my split video it plays fine on other video players, like VLC, but stutters when initially playing on Windows Media Player and even shows a blank screen for a moment and then after about 5 seconds, the video will play normally. If I then select play again without reloading, Windows Media Player will play the video fine, with no stuttering.

  If I REMOVE the start parameter when doing the conversion, then the resulting video will play without issues on all my players, INCLUDING Windows Media Player.

  I have tried changing the frame rate, the bit rate and altered different optimization options mentioned here - https://trac.ffmpeg.org/wiki/Encode/H.264

  I need the split video to play on Windows machines on Windows Media Player and on the web streamed using the video element. This is why I chose H264 codec and MP4.

  Has anyone had issues playing ffmpeg split videos using H264 codec with Windows Media Player ? I am using the latest version of ffmpeg. Anyone have any other suggestions on any different settings I could try to adjust ?

  Thanks

• ffmpeg mp4 to hls transcode fails on Azure Windows Server Image [closed]

  13 février, par James Weatherhead

  I am having an issue with transcoding an mp4 (any mp4) to hls. If I run the command below on my Windows 11 machine it works fine. If I run it on a clean Windows 11 VM, it works fine. If I run it on a clean Windows 2022 Server VM it works fine. If I create a Windows 2022 server image in Azure and run it... it fails (see error below)

  


  I feel like something that FFMPEG needs is missing from the default server image in Azure. Has anyone experienced this issue and found a way to solve it ?

  


  The command I am using :

  


  ffmpeg.exe -i LowPriVMs-1.mp4 -filter_complex "[0:v]split=1[v1] ; [v1]scale=w=1920:h=1080[v1out] ; " -map "[v1out]" -c:v:0 mpeg4 -b:v:0 5000k -maxrate:v:0 5350k -bufsize:v:0 7500k -map a:0 -c:a aac -b:a:0 192k -ac 2 -f hls -hls_time 10 -hls_playlist_type vod -hls_flags independent_segments -hls_segment_type mpegts -hls_segment_filename stream_%v/data%03d.ts -master_pl_name master.m3u8 -var_stream_map "v:0,a:0" stream_%v/playlist.m3u8

  


  The error returned by FFMPEG is :

  


  [out#0/hls @ 00000204c6aded40] Could not write header (incorrect codec parameters ?) : Invalid argument

  


  Has anyone else encountered this and found a solution ? I wondered if it is required to add a Feature Pack or some such dependency to Windows ?

  


  Thanks
James