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bitmap from video file source available?


I get an infinite loop and non-"optimal" results from an MSDN Magazine March 2007 article on creating bitmaps from video files.

The infinite loop and non-"optimal" results are from a Microsoft Support Technician.

Does anyone have better code or better workarounds?

Here is my code:

private void CreateThumbnail(string file, string outputDir)
MediaPlayer mp = new MediaPlayer();
mp.Open(new Uri(file));
mp.Position = new TimeSpan(00, 00, 00);

RenderTargetBitmap rtb = new RenderTargetBitmap(260, 184, 1 / 200, 1 / 200, PixelFormats.Pbgra32);

DrawingVisual dv = new DrawingVisual();
DrawingContext dc = dv.RenderOpen();
RectAnimation ra = new RectAnimation();
dc.DrawVideo(mp, new Rect(0, 0, 260, 184));


string filename = GetFileName(file);

//create the output filename
object[] formatParams = new object[2];
formatParams[0] = outputDir;
formatParams[1] = filename;

string outputFileName = null;

outputFileName = string.Format("{0}\\{1}_thumbnail.bmp", formatParams);

BmpBitmapEncoder encoder = new BmpBitmapEncoder();

using (FileStream writer = new FileStream(outputFileName, FileMode.Create))
System.Console.WriteLine("Saving [{0}]", outputFileName);
mp = null;
catch (Exception e)
System.Console.WriteLine("CreateThumbnail: " + e.Message);

private void Workaround(MediaPlayer mp)
TimeSpan startPosition = mp.Position;
while (startPosition == mp.Position)
Jul 3 '08 #1
0 1107

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