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    10 avril 2011

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    25 avril 2011, par

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  • Revision 33026 : Ajout des classes mots, breves, auteurs ... dans les extras

    17 novembre 2009, par shnoulle@… — Log

    Ajout des classes mots, breves, auteurs ... dans les extras

  • Revision 30147 : corrections orthographiques

    24 juillet 2009, par denisb@… — Log

    corrections orthographiques

  • How to convert a Stream on the fly with FFMpegCore ?

    18 octobre 2023, par Adrian

    For a school project, I need to stream videos that I get from torrents while they are downloading on the server.
When the video is a .mp4 file, there's no problem, but I must also be able to stream .mkv files, and for that I need to convert them into .mp4 before sending them to the client, and I can't find a way to convert my Stream that I get from MonoTorrents with FFMpegCore into a Stream that I can send to my client.

    


    Here is the code I wrote to simply download and stream my torrent :

    


    var cEngine = new ClientEngine();

var manager = await cEngine.AddStreamingAsync(GenerateMagnet(torrent), ) ?? throw new Exception("An error occurred while creating the torrent manager");

await manager.StartAsync();
await manager.WaitForMetadataAsync();

var videoFile = manager.Files.OrderByDescending(f => f.Length).FirstOrDefault();
if (videoFile == null)
    return Results.NotFound();

var stream = await manager.StreamProvider!.CreateStreamAsync(videoFile, true);
return Results.File(stream, contentType: "video/mp4", fileDownloadName: manager.Name, enableRangeProcessing: true);


    


    I saw that the most common way to convert videos is by using ffmpeg. .NET has a package called FFMpefCore that is a wrapper for ffmpeg.

    


    To my previous code, I would add right before the return :

    


    if (!videoFile.Path.EndsWith(".mp4"))
{
    var outputStream = new MemoryStream();
    FFMpegArguments
        .FromPipeInput(new StreamPipeSource(stream), options =>
        {
            options.ForceFormat("mp4");
        })
        .OutputToPipe(new StreamPipeSink(outputStream))
        .ProcessAsynchronously();
    return Results.File(outputStream, contentType: "video/mp4", fileDownloadName: manager.Name, enableRangeProcessing: true);
}


    


    I unfortunately can't get a "live" Stream to send to my client.

    


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