C# Extract bitmaps from MP4 stream

Question

Recently, i searched alot on the internet for a good C# lib to Extract bitmaps from MP4 videos, and i found somethings that were similar to this code, but not to MP4:

        VideoStream stream = aviManager.GetVideoStream(@"C:\Users\User\Desktop\video.mp4");
        //the video.mp4 is usually .avi or .mpeg
        for (int n = 0; n < stream.CountFrames; n++)
        {
            Bitmap bmp = new Bitmap(stream.GetBitmap(Position));
            bmp.Save(@"C:\Users\Nehoray\Desktop\Something.png");
            bmp.Dispose;
        }

Can anyone give me a library with an easy code like this, just for MP4? :)

@deadfish - if you just need to play mp4 video as an avi file and dont need to _actually_ convert the container format, you should be able to just rename the file. — StingyJack, Sep 28 '17 at 13:00

score 3 · Answer 1 · answered Oct 08 '12 at 20:47

3

I have used Expression Encoder SDK for a similar task. They declare that MP4 is supported. Take a look at the AudioVideoFile.GetThumbnail method.

answered Oct 08 '12 at 20:47

Sergey Rybalkin

3,004
22
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Thank you, I'll try to use it :) Is there anyway you could post a code that i could use? – Omer litchy Oct 09 '12 at 20:51
Their SDK contains an example called `ThumbnailGenerator`, I've copied its sources here - http://codepaste.net/6nzper – Sergey Rybalkin Oct 10 '12 at 09:33
I had to install QuickTime on my PC and add the QTF.dll into my bin folder in order to process MP4 – bryanbcook Jan 27 '15 at 21:37

deadfish · Answer 2 · 2012-10-08T20:35:37.217

For avi I used to write something like this:

string filename = "file.avi";
string storagepath = @"temp\";
static int counter = 0;
MediaDetClass memde;

private void button1_Click(object sender, EventArgs e)
{
    if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
    {
        // Create the subfolder
        System.IO.Directory.CreateDirectory("temp");

    // Some properities
        counter = 0;
        memde = new MediaDetClass();
        Image img;
        memde.Filename = openFileDialog1.FileName;
        memde.CurrentStream = 0;
        int len = (int)memde.StreamLength;
        float percent = 0.002f;//how far do u want for a single step

        for (float i = 0.0f; i < len; i = i + (float)(percent * len))
        {

            counter++;
            string fbitname = storagepath + counter.ToString();
            memde.WriteBitmapBits(i, 850, 480, fbitname + ".bmp");
            //img = Image.FromFile(fbitname + ".bmp");
            //img.Save(fbitname + ".bmp", ImageFormat.Bmp);
            //img.Dispose();
            //System.IO.File.Delete(i + fbitname + ".bmp");
        }
}

Library used was: Interop.DexterLib.dll, I'm not sure now if you can find it in C# resources. I can share link if you want.

GitHub Repo just download RAW file ( There is in C# folder).

Thanks, actually it helped me for the avi files (i had a problem with the current code).. I only have 1 problem - im rendering on MP4, because I'm uploading videos to youtube, and AVI is too heavy.. I'll be glad if you'll share a link :) — Omer litchy, Oct 08 '12 at 01:56

score 0 · Answer 3 · edited May 23 '17 at 11:44

0

For anyone else running across this post, checkout this answer: Get thumbnail image of video file in C#

One of the posts mention a NuGet package called NReco.VideoConverter. This lets you create thumbnails quite easily from an MP4 file:

var ffMpeg = new NReco.VideoConverter.FFMpegConverter();
ffMpeg.GetVideoThumbnail(pathToVideoFile, pathToNewThumbnail, locationInSeconds);

edited May 23 '17 at 11:44

Community

1
1

answered Mar 23 '15 at 15:17

lehn0058

19,977
15
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This is not availabe for WP 8.1 – Florian-Rh Aug 28 '15 at 11:56

C# Extract bitmaps from MP4 stream

3 Answers3