.netcore 6 console app on mac - "Specified method is not supported"

[davidbelle]

When compiling the example found for fingerprinting video, an exception "Specified method is not supported" is thrown.

To Reproduce

public class Playground
	{
        // save fingerprints in Emy Community Edition https://hub.docker.com/repository/docker/addictedcs/soundfingerprinting.emy
        private readonly IModelService modelService = EmyModelService.NewInstance("localhost", 3399);
        //private readonly IModelService modelService = new InMemoryModelService();

        // use FFmpeg to extract samples and frames from files: https://github.com/AddictedCS/soundfingerprinting/wiki/Audio-Services
        private readonly IMediaService mediaService = new FFmpegAudioService();

        public async Task AddClip(string location)
        {


            Console.WriteLine("Add Clip " +location);
            var avHashes = await FingerprintCommandBuilder.Instance
                .BuildFingerprintCommand()
                .From(location, MediaType.Video)
                .UsingServices(mediaService)
            .Hash();
            Console.WriteLine("added, create track");

            var track = new TrackInfo("1234", "BWM", "", MediaType.Video);
            Console.WriteLine("track has been created, now to insert it");
            modelService.Insert(track, avHashes);
            Console.WriteLine("Track has been inserted into model");
        }
}

Program.cs

Playground playground = new Playground();
await playground.AddClip("file.mp4");

Exception is thrown on the " var avHashes = await FingerprintCommandBuilder.Instance...." line.

Exception

System.NotSupportedException: "Specified method is not supported."
  at FFmpeg.AutoGen.Bindings.DynamicallyLoaded.DynamicallyLoadedBindings.<>c.<Initialize>b__6_1428()\n   at SoundFingerprinting.Emy.FFmpeg.Demuxer.OpenInputFile(String file)\n   at SoundFingerprinting.Emy.FFmpeg.Demuxer..ctor(String file, MediaType mediaType, CancellationToken cancellationToken)\n   at SoundFingerprinting.Emy.AudioVideo.Data.FFmpegDataService.<ReadAVTrack>d__4.MoveNext()\n   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)\n   at SoundFingerprinting.Emy.AudioVideo.Data.FFmpegDataService.ReadTrack(String file, MediaType mediaType, Double seconds, AVTrackReadConfiguration configuration)\n   at SoundFingerprinting.Emy.FFmpegAudioService.ReadFramesFromFile(String pathToFile, VideoTrackReadConfiguration configuration, Double seconds, Double startsAt)\n   at SoundFingerprinting.Command.FingerprintCommand.<>c__DisplayClass13_0.<From>b__0()\n   at System.Threading.Tasks.Task`1.InnerInvoke()\n   at System.Threading.Tasks.Task.<>c.<.cctor>b__272_0(Object obj)\n   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)\n--- End of stack trace from previous location ---\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\n   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)\n   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)\n--- End of stack trace from previous location ---\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\n   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()\n   at Newsfinder.Playground.<AddClip>d__3.MoveNext() in Playground.cs:line 35\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\n   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()\n   at Program.<<Main>$>d__0.MoveNext() in Program.cs:47

I have the community edition of Envy running in docker, but I also tried InMemoryModelService instead and have the same issue.

Thanks :)

[AddictedCS]

What is the output of the fmpeg -version command in your terminal?

[davidbelle]

ffmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
built with Apple clang version 14.0.0 (clang-1400.0.29.202)
configuration: --prefix=/usr/local/Cellar/ffmpeg/5.1.2_1 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
libavutil      57. 28.100 / 57. 28.100
libavcodec     59. 37.100 / 59. 37.100
libavformat    59. 27.100 / 59. 27.100
libavdevice    59.  7.100 / 59.  7.100
libavfilter     8. 44.100 /  8. 44.100
libswscale      6.  7.100 /  6.  7.100
libswresample   4.  7.100 /  4.  7.100
libpostproc    56.  6.100 / 56.  6.100

[AddictedCS]

FFmpeg 5 is not supported yet.
Please install ffmpeg@4.

Remove previously installed ffmpeg.

brew uninstall ffmpeg

and then install v4

brew install ffmpeg@4

[davidbelle]

Thanks. I've removed 5 and installed 4 as suggested but still get the same error.

ffmpeg version 4.2.2-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.16)
configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
libavutil      56. 31.100 / 56. 31.100
libavcodec     58. 54.100 / 58. 54.100
libavformat    58. 29.100 / 58. 29.100
libavdevice    58.  8.100 / 58.  8.100
libavfilter     7. 57.100 /  7. 57.100
libswscale      5.  5.100 /  5.  5.100
libswresample   3.  5.100 /  3.  5.100
libpostproc    55.  5.100 / 55.  5.100

[AddictedCS]

Unfortunately, brew does not link the contents of/usr/local/opt/ffmpeg@4/lib/ to /usr/local/lib, as it considers it to be just a keg (whatever that means, installing older versions does not link it automatically), so you can either link it manually, or wait until I add a probe path to v8.18.0.
The following command will link FFmpeg libraries to /usr/local/lib such that they are available in the executable probing

ln -s /usr/local/opt/ffmpeg@4/lib/* /usr/local/lib

[davidbelle]

I dunno what that means either but hey, it worked! Thanks :)

[Bloos]

same thing happened to me on a fedora system. Luckily I was using Docker anyway and could switch over to a ubuntu image