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POCreated a UYVY image over directshow and its corrupted and im not sure why
 

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  1. POCreated a UYVY image over directshow and its corrupted and im not sure why
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    <p>I have a buffer of UYVY data from a camera and i am using the GSSF Directshow.net filter to push the buffer through a graph. </p> <p>The Graph at the moment is</p> <pre><code>GSSF -&gt; YUV Transform -&gt; AVI Splitter -&gt; Video Renderer </code></pre> <p>The graph correctly calculates the color and is displaying it correctly but theres bars in the image that shouldn't be there and i am not sure where they are coming from. It hurts my eyes to stare at the image.</p> <p><img src="https://i.stack.imgur.com/UdHkt.png" alt="enter image description here"></p> <p>This function takes the UYVY buffer (mainbyte) and copies it to an array of integers</p> <pre><code> unsafe public void ImageFromPixels__() { byte[] x = mainbyte; long fff = 720 * 1280; mainptr = new IntPtr(fff); for (int p = 0; p &lt; 720 * 1280; p++) { U = (x[p * 4 + 0]); Y = (x[p * 4 + 1]); V = (x[p * 4 + 2]); Y2 = (x[p * 4 + 3]); // int one = V &lt;&lt; 16 | Y &lt;&lt; 8 | U; // int two = V &lt;&lt; 16 | Y2 &lt;&lt; 8 | U; int one = Y2 &lt;&lt; 24 | V &lt;&lt; 16 | Y &lt;&lt; 8 | U; // mainint[p * 2 + 0] = one; // mainint[p * 2 + 1] = two; mainint[p] = one; } m_FPS = UNIT / 20; m_b = 211; m_g = 197; } </code></pre> <p>This function takes that same array of integers and packs it into the GSSF stream pointer</p> <pre><code> override unsafe public int GetImage(int iFrameNumber, IntPtr ip, int iSize, out int iRead) { int hr = 0; if (iFrameNumber&gt;-1) { if (iFrameNumber &lt; MAXFRAMES) { ImageFromPixels_(20, mainbyte); m_g += 3; m_b += 7; int* bp = (int*)ip.ToPointer(); Random k = new Random(); StreamReader s = new StreamReader("jpegFile.txt"); for (int f = 0; f &lt; HEIGHT; f++) { for (int x = 0; x &lt; (WIDTH); x += 1) { *(bp + (f * WIDTH) + x) = mainint[f * 1280 + x]; } } } else { hr = 1; // End of stream } } iRead = iSize; return hr; } </code></pre> <p>This sets up the bitmap compression for the output pin of the GSSF I think i may be doing something wrong here but it looks correct.</p> <pre><code> override public void SetMediaType(IGenericSampleConfig psc) { BitmapInfoHeader bmi = new BitmapInfoHeader(); // Build a BitmapInfo struct using the parms from the file bmi.Size = Marshal.SizeOf(typeof(BitmapInfoHeader)); bmi.Width = WIDTH; bmi.Height = HEIGHT * -1; bmi.Planes = 1; bmi.BitCount = BPP; bmi.Compression = 0x59565955; //UYVY bmi.ImageSize = (bmi.BitCount / 8) * bmi.Width * bmi.Height; bmi.XPelsPerMeter = 0; bmi.YPelsPerMeter = 0; bmi.ClrUsed = 0; bmi.ClrImportant = 0; int hr = psc.SetMediaTypeFromBitmap(bmi, m_FPS); DsError.ThrowExceptionForHR(hr); } </code></pre> <p><strong>UPDATE</strong> changed it abit</p> <pre><code> override unsafe public int GetImage(int iFrameNumber, IntPtr ip, int iSize, out int iRead) { int hr = 0; if (iFrameNumber&gt;-1) { if (iFrameNumber &lt; MAXFRAMES) { ImageFromPixels_(20, mainbyte); m_g += 3; m_b += 7; int* bp = (int*)ip.ToPointer(); Random k = new Random(); StreamReader s = new StreamReader("jpegFile.txt"); for (int f = 0; f &lt; 720; f++) { for (int x = 0; x &lt; (1280); x += 1) { *(bp + (f * 1280) + x) = mainint[f * 1280 + x]; } } } else { hr = 1; // End of stream } } </code></pre> <p>// override public void SetMediaType(IGenericSampleConfig psc) { BitmapInfoHeader bmi = new BitmapInfoHeader();</p> <pre><code> // Build a BitmapInfo struct using the parms from the file bmi.Size = Marshal.SizeOf(typeof(BitmapInfoHeader)); bmi.Width = WIDTH; bmi.Height = HEIGHT * -1; bmi.Planes = 1; bmi.BitCount = BPP; bmi.Compression = 0x59565955; bmi.ImageSize = (bmi.BitCount / 8) * bmi.Width * bmi.Height; bmi.XPelsPerMeter = 0; bmi.YPelsPerMeter = 0; bmi.ClrUsed = 0; bmi.ClrImportant = 0; int hr = psc.SetMediaTypeFromBitmap(bmi, m_FPS); DsError.ThrowExceptionForHR(hr); } </code></pre> <p>//</p> <pre><code> unsafe public void ImageFromPixels_(long FPS, byte[] x) { long fff = 720 * 1280 * 3; mainptr = new IntPtr(fff); for (int p = 0; p &lt; 720 * 640; p++) { U = (x[ p * 4 + 0]); Y = (x[p * 4 + 1]); V = (x[p * 4 + 2]); Y2 = (x[p * 4 + 3]); int one = Y2 &lt;&lt; 24 | V &lt;&lt; 16 | Y &lt;&lt; 8 | U; //int one = V &lt;&lt; 16 | Y &lt;&lt; 8 | U; //int two = V &lt;&lt; 16 | Y2 &lt;&lt; 8 | U; //mainint[p * 2 + 0] = one; //mainint[p * 2 + 1] = two; mainint[p] = one; } m_FPS = UNIT / FPS; m_b = 211; m_g = 197; } </code></pre> <p><img src="https://i.stack.imgur.com/1LUda.png" alt="enter image description here"></p> <p>if i change the other numbers within GetImage to alter the height of the video, or if i chnge it inside of ImagePixel then i just get black screens :|</p>
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