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POQuestions about CVOpenGLESTextureCacheCreateTextureFromImage
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copied!<p>I attempt to extract yuv data from the pixel buffer received from camera and then re-create a pixel buffer, but I got -6683 at CVOpenGLESTextureCacheCreateTextureFromImage, the documentation simply states that </p> <blockquote> <p>The pixel buffer is not compatible with OpenGL due to an unsupported buffer size, pixel format, or attribute.</p> </blockquote> <p>Which does not help me much. How can I fix it? The code as below:</p> <pre><code>- (void)Init { *****; OSStatus err = CMBufferQueueCreate(kCFAllocatorDefault, 1, CMBufferQueueGetCallbacksForUnsortedSampleBuffers(), &previewBufferQueue); } - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection { OSStatus err = CMBufferQueueEnqueue(previewBufferQueue, sampleBuffer); if ( !err ) { dispatch_async(dispatch_get_main_queue(), ^{ CMSampleBufferRef sbuf = (CMSampleBufferRef)CMBufferQueueDequeueAndRetain(previewBufferQueue); if (sbuf) { CVImageBufferRef pixBuf = CMSampleBufferGetImageBuffer(sbuf); [self.delegate displayPixelBuffer:pixBuf]; CFRelease(sbuf); } }); } } </code></pre> <p>The displayPixelBuffer method:</p> <pre><code>-(void)displayPixelBuffer:(CVImageBufferRef)pixelBuffer { CVPixelBufferLockBaseAddress(pixelBuffer, 0); size_t planeWidth[2] = {CVPixelBufferGetWidthOfPlane(pixelBuffer, 0), width}; size_t planeHeight[2] = {CVPixelBufferGetHeightOfPlane(pixelBuffer, 0), CVPixelBufferGetHeightOfPlane(pixelBuffer, 1)}; size_t planeBytesPerRow[2] = {CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 0), width/2}; unsigned char *YUV2[2] = {0}; YUV2[0] = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0); YUV2[1] = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 1); CVReturn renturn = CVPixelBufferCreateWithPlanarBytes(kCFAllocatorDefault, width, height, kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange, 0, 0, 2, (void *)YUV2, planeWidth, planeHeight, planeBytesPerRow, nil, nil, nil, &imageBuffer); glActiveTexture(GL_TEXTURE0); CVOpenGLESTextureRef texture = NULL; CVReturn err = CVOpenGLESTextureCacheCreateTextureFromImage(kCFAllocatorDefault, videoTextureCache, imageBuffer, NULL, GL_TEXTURE_2D, GL_LUMINANCE, width, height, GL_LUMINANCE, GL_UNSIGNED_BYTE, 0, &texture); if (!texture || err) { NSLog(@"CVOpenGLESTextureCacheCreateTextureFromImage failed (error: %d)", err); return; } glBindTexture(CVOpenGLESTextureGetTarget(texture), 0); // Flush the CVOpenGLESTexture cache and release the texture CVOpenGLESTextureCacheFlush(videoTextureCache, 0); CVPixelBufferUnlockBaseAddress(pixelBuffer, 0); CFRelease(texture); } </code></pre> <p>The result is CVOpenGLESTextureCacheCreateTextureFromImage failed(error:-6683), why?</p>

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