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PORBG24 can be played well on Windows, but on iOS it can't
 

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  1. PORBG24 can be played well on Windows, but on iOS it can't
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    <p>By decoder transform H264 video to rgb24 file, it can be displayer well on Windows, but when I use UIImage to display it on UIImageView its color is not right. The code I use as this:</p> <pre><code>- (UIImage *)imageFromAVPicture:(const UInt8 *)pict width:(int)width height:(int)height { CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault; CFDataRef data = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, pict, width*height*3,kCFAllocatorNull); CGDataProviderRef provider = CGDataProviderCreateWithCFData(data); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGImageRef cgImage = CGImageCreate(width, height, 8, 24, width*3, colorSpace, bitmapInfo, provider, NULL, YES, kCGRenderingIntentDefault); CGColorSpaceRelease(colorSpace); UIImage *image = [self scaleImage:cgImage]; //UIImage *image = [[UIImage alloc] initWithCGImage:cgImage]; CGImageRelease(cgImage); CGDataProviderRelease(provider); CFRelease(data); return image; } </code></pre> <p>But before create CGImage, add code as following, its show will be right, what following code do is transform betweent rgb and bgr.</p> <pre><code>UInt8 tmpBuff1,*tmpBuff2; tmpBuff2 = (UInt8 *)pict; for(int i =0;i&lt;height;i++) { for(int j=0;j&lt;width;j++) { tmpBuff1 = *tmpBuff2; *tmpBuff2 = *(tmpBuff2+2); *(tmpBuff2+2) = tmpBuff1; tmpBuff2 += 3; } } </code></pre> <p>After transform from rgb to bgr, its show will be right.</p> <p>So I want to know why, why the same RGB24 file can play well on PC, but wrong on iOS before transform from RGB24 to BGR24.</p>
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