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• Revert "lavc/nvenc : handle frame durations and AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE"

  16 juin 2023, par Timo Rothenpieler

  Revert "lavc/nvenc : handle frame durations and AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE"
  The implementation is flawed in that the frame opaque data is not in
  
  fact correctly reordered along with the packets, but is being output in
  
  packet input order, just like the dts are.
  This reverts commit 35538097038fd1e36577306d3165f38c8fa02466.
  

  • [DH] libavcodec/nvenc.c
  • [DH] libavcodec/nvenc.h
  • [DH] libavcodec/nvenc_av1.c
  • [DH] libavcodec/nvenc_h264.c
  • [DH] libavcodec/nvenc_hevc.c

• Handling "NullReferenceException" when executing "ffmpeg.exe" process in C# [duplicate]

  1er juillet 2023, par FrostDream

  I'm trying to execute the "ffmpeg.exe" process in my C# application to process media files. However, I'm encountering a "NullReferenceException" when running the code. I've tried various approaches, including using a try-catch block, but the exception still persists. Here's the relevant code snippet :

  


  bool isValidMedia = true;

try
{
    Process process = new Process();
    process.StartInfo.FileName = "ffmpeg.exe";
    process.StartInfo.Arguments = $"-i \"{file}\" -f null -";
    process.StartInfo.UseShellExecute = false;
    process.StartInfo.RedirectStandardOutput = true;
    process.StartInfo.CreateNoWindow = true;
    process.OutputDataReceived += (sender, e) =>
    {
        if (!string.IsNullOrEmpty(e.Data))
        {
            int startIndex = e.Data.IndexOf("samples=") + 8;
            button.Width = int.Parse(e.Data.Substring(startIndex, e.Data.IndexOf(" ") - startIndex)) / zoom * 100;
        }
        else
        {
            isValidMedia = false;
        }
    };

    process.Start();
    process.BeginOutputReadLine();
    process.WaitForExit();
}
catch
{
    isValidMedia = false;
}

if (!isValidMedia)
{
    MessageBox.Show("Not a valid media.");
    return;
}



  


  I suspect that the issue may be related to the asynchronous execution of the event handler or the initialization of the ProcessStartInfo object. Can anyone please help me identify the cause of the "NullReferenceException" and provide guidance on how to resolve it ? Thank you in advance for your assistance.

  


• ffmpeg generates "unconnected output" error using -filte_complext [closed]

  25 juillet 2023, par ConiferRod

  I'm trying to combine the rtsp streams of 4 Wyze cameras into a single stream and pipe the result into ffplay (Windows 11). My -filter_complex generates an 'unconnected output' error.

  


  The command :
"C :\Program Files\ffmpeg\ffmpeg.exe" ^
-i rtsp ://user:password@10.0.0.239/live ^
-i rtsp ://user:password@10.0.0.181/live ^
-i rtsp ://user:password@10.0.0.251/live ^
-i rtsp ://user:password@10.0.0.252/live ^
-filter_complex "[0:v][1:v][2:v][3:v]xstack=inputs=4:layout=0_0|w0_0|0_h0|w0_h0[v]" -map '[v]' ^
| "C :\Program Files\ffmpeg\ffplay.exe" -

  


  The error :
[fc#0 @ 000001f45c979d40] Filter xstack:default has an unconnected output
Error : Invalid argument
fd: : Invalid data found when processing input 0KB sq= 0B f=0/0