There is no .ToBitmap() Method for ReadFrame(framecount)

[cemalgulbeyaz]

var file = MediaFile.Open(@"C:\videos\movie.mp4"); for (int i = 0; i < file.Video.Info.FrameCount; i++) { file.Video.ReadFrame(i).ToBitmap().Save($@"C:\images\frame_{i}.png"); }

I wrote a code from your Seample code but there is no ToBitmap Method. I using Visual Studio 16.4.1 and Project .Net Core 3.1 Windows Worm. Can you help me? Screen Capture of Code;

[radek-k]

Sorry for the inaccurate information in the readme. I`ve just updated it. Please read the usage details.

In a .NET Core project you should install the ImageSharp library from Nuget and add the following class to your main namespace (in a new file)

public static class Extensions
{
   public static Image<Bgr24> ToBitmap(this ImageData imageData)
   {
      return Image.LoadPixelData<Bgr24>(imageData.Data, imageData.ImageSize.Width, imageData.ImageSize.Height);
   }
}

[radek-k]

The complete .NET Core sample app with ImageSharp should look like this

using System;
using System.IO;
using FFMediaToolkit.Graphics;
using FFMediaToolkit.Decoding;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;

namespace YourProjectNamespace
{
    public class Program
    {
        static void Main(string[] args)
        {
            var file = MediaFile.Open(@"C:\videos\movie.mp4");
            int i = 0;
            while(file.Video.TryReadNextFrame(out var imageData))
            {
                using(var fs = new FileStream($@"C:\images\frame_{i++}.png", FileMode.Create))
                {
                    imageData.ToBitmap().SaveAsPng(fs);
                }
            }
        }
    }

    public static class Extensions
    {
        public static Image<Bgr24> ToBitmap(this ImageData imageData)
        {
            return Image.LoadPixelData<Bgr24>(imageData.Data, imageData.ImageSize.Width, imageData.ImageSize.Height);
        }
    }
}

[dev-masih]

@radek-k you sample code for me results in Access violation crash when reaches line ReadFrame. do you have any idea how to resolve that?

[alexchri]

@radek-k you sample code for me results in Access violation crash when reaches line ReadFrame. do you have any idea how to resolve that?

I am hitting the same issue - any ideas here?

[radek-k]

@radek-k you sample code for me results in Access violation crash when reaches line ReadFrame. do you have any idea how to resolve that?

I am hitting the same issue - any ideas here?

@alexchri Please update FFMediaToolkit package to v3.1.0. I've just fixed this bug.

[MastalerzKamil]

The complete .NET Core sample app with ImageSharp should look like this

using System;
using System.IO;
using FFMediaToolkit.Graphics;
using FFMediaToolkit.Decoding;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;

namespace YourProjectNamespace
{
    public class Program
    {
        static void Main(string[] args)
        {
            try
            {
                var file = MediaFile.Open(@"C:\videos\movie.mp4");
                for (int i = 0; i < file.Video.Info.FrameCount; i++)
                {
                    using(var fs = new FileStream($@"C:\images\frame_{i}.png", FileMode.Create))
                    {
                        file.Video.ReadFrame(i).ToBitmap().SaveAsPng(fs);
                    }
                }
            }
            catch(EndOfStreamException) { }
        }
    }

    public static class Extensions
    {
        public static Image<Bgr24> ToBitmap(this ImageData imageData)
        {
            return Image.LoadPixelData<Bgr24>(imageData.Data, imageData.ImageSize.Width, imageData.ImageSize.Height);
        }
    }
}

@radek-k It works for me but it generates System.IO.EndOfStreamException as I described on issue #43

[Ulakurak]

Kindly request you to update the Setup section. First of all the Zeranoe FFmpeg site link is not working. I have used the https://www.gyan.dev/ffmpeg/builds/ link to get required binaries. On MediaFile.Open(@"C:\videos\movie.mp4") there is error message: System.IO.DirectoryNotFoundException: 'Cannot found the default FFmpeg directory. On Windows you have to specify a path to a directory containing the FFmpeg shared build DLL files

[hey-red]

@Ulakurak

On Windows you have to specify a path to a directory containing the FFmpeg shared build DLL files

Another way is nuget package with FFmpeg dll's. For example https://www.nuget.org/packages/ImageSharp.AVCodecFormats.Native/ It should work out of box with FFMediaToolkit.