getting delegate failed while working with mp4 files

[EarsKilla]

Don't have any ideas how to fix this:

delegate failed `"ffmpeg.exe" -nostdin -v -1 -i "%M%%d.pam" -plays %I "%u.%m"' @ error/delegate.c/InvokeDelegate/1898

Tried:

• put ffmpeg.exe around my app exe (...\bin\Debug\netcoreapp3.1)
• put folder with ffmpeg.exe into path
• downgrade from latest 7.22.2.2 to 7.22.0.0 because of this
• setting different platform targeting (Any CPU (current) / 32-bit / 64-bit)
• different builds of ffmpeg (x86 and x64)

Packages related to Magick.NET installed:

• Magick.NET-Q8-AnyCPU 7.22.2.2
• Magick.NET.Core 5.2.2

Environment:

• Windows 10 x64 1809

• >dotnet --list-sdks
  2.1.807 [C:\Program Files\dotnet\sdk]
  3.1.301 [C:\Program Files\dotnet\sdk]
  3.1.302 [C:\Program Files\dotnet\sdk]
  5.0.100 [C:\Program Files\dotnet\sdk]

• targeting .net-core 3.1

---

On linux machine (debian 10) it's failing with another error:

NoTagFound `video:decode' @ error/delegate.c/InvokeDelegate/1736

$ dotnet --list-sdks
2.1.811 [/usr/share/dotnet/sdk]
2.2.402 [/usr/share/dotnet/sdk]
3.0.103 [/usr/share/dotnet/sdk]
3.1.201 [/usr/share/dotnet/sdk]
3.1.404 [/usr/share/dotnet/sdk]
5.0.100 [/usr/share/dotnet/sdk]

ffmpeg version 4.1.6-1~deb10u1

Note: Project was rebuilded on linux machine

Another note: planning to develop on windows but run on linux

[EarsKilla]

here is code:

        private async Task<MemoryStream> DoAnimatedMeme(Stream data)
        {
            using var imageCollection = new MagickImageCollection(data, MagickFormat.Mp4);

            var framesCount = imageCollection.Count;
            for (var i = 0; i < framesCount; i++)
            {
                var frame = imageCollection[i];

                var oldHeight = frame.Height;
                var oldWidth = frame.Width;

                var percentage = new Percentage(100 - CalcPercentage(i + 1, framesCount, 70));
                frame.LiquidRescale(percentage);

                frame.Resize(oldWidth, oldHeight);
            }

            var mem = new MemoryStream();
            await imageCollection.WriteAsync(mem).ConfigureAwait(false);

            mem.Position = 0;

            return mem;
        }

PS: need to work with streams because downloading file stream from the internet, process this file and upload back

[dlemstra]

When running on Linux you will need to use the ffmpeg executable that was compiled on that platform. Starting with the next version ffmpeg will be executed instead of ffmpeg.exe.