Update compressing-data.md

desktop-src/Multimedia/compressing-data.md

@@ -57,7 +57,49 @@ else
 
 ```
 
+A detailed compress-image-data example, which explains how to write compressed data to the AVI file, can be found in 
+[**the SO post**](https://stackoverflow.com/questions/22765194/is-it-possible-to-encode-using-the-mrle-codec-on-video-for-windows-under-windows/79762695#79762695)
+. A crucial point of this post states that, when writing the compressed data, we do still need to create the compressed stream, but we no longer write to it, 
+as we did it before Windows 8. Instead we write RLE8 encoded data to the raw stream. Also, we do not put the compress loop inside ICCompressBegin/ICCompressEnd 
+brackets, because AVIStreamSetFormat sends the ICM_COMPRESS_BEGIN message with lpInput and lpOutput parameters (as the ICCompressBegin macro does) and AVIStreamRelease sends the ICM_COMPRESS_END message (as the ICCompressEnd macro does in the code above):
 
+```C
+    DWORD dwCkID;
+    DWORD dwCompFlags = AVIIF_KEYFRAME;
+    LONG  lNumFrames, lFrameNum = 0;
+    LONG lSamplesWritten = 0;
+    LONG lBytesWritten = 0;
+    // Assume dwNumFrames is initialized to the total number of frames. 
+    // Assume dwQuality holds the proper quality value (0-10000). 
+    // Assume lpbiOut, lpOut, lpbiIn, and lpIn are initialized properly. 
+
+    if (AVIStreamSetFormat(pCompressedStream, 0, lpbiIn, biSize) != 0)
+    {
+        std::cout << "AVIStreamSetFormat failed" << std::endl;
+        return 1;
+    }
+
+    for (int frame = 0; frame < nframes; frame++)
+    {
+        ICCompress(hIC, 0, lpbiOut, lpOutput, lpbiIn, lpInput,
+            &dwCkID, &dwCompFlags, frame, lpbiIn->biSizeImage, dwQuality, NULL, NULL);
+        hr = AVIStreamWrite(pStream, frame, 1, lpOutput, lpbiOut->biSizeImage,
+            AVIIF_KEYFRAME, &lSamplesWritten, &lBytesWritten);
+        if (hr != S_OK)
+        {
+            std::cout << "AVIStreamWrite failed" << std::endl;
+            return 1;
+        }
+    }
+
+    //GlobalUnlock(...),GlobalFree(...);
+
+    if (AVIStreamRelease(pCompressedStream) != 0 || AVIStreamRelease(pStream) != 0)
+    {
+        std::cout << "AVIStreamRelease failed" << std::endl;
+        return 1;
+    }
+```