CVOpenGLESTextureCacheCreateTextureFromImage 返回 -6683(kCVReturnPixelBufferNotOpenGLCompatible) [英] CVOpenGLESTextureCacheCreateTextureFromImage return -6683(kCVReturnPixelBufferNotOpenGLCompatible)

问题描述

我已经分别从视频帧中提取YUV数据并保存在data[0],data[1],data[2];帧大小为640*480;现在我创建 pixelBuffer 如下:

I had extract Y U V data from video frame separately and saved them in data[0],data[1],data[2];The frame size is 640*480;Now I creat the pixelBuffer as below:

void *pYUV[3] = {data[0], data[1], data[2]};
size_t planeWidth = {640, 320, 320};
size_t planeHeight = {480, 240, 240};
size_t planeBytesPerRow = {640, 320, 320};
CVReturn renturn = CVPixelBufferCreateWithPlanarBytes(kCFAllocatorDefault,
                                   640, 
                                   480,
                                   kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange, 
                                   nil,
                                   nil,
                                   3, 
                                   pYUV,
                                   planeWidth,
                                   planeHeight, 
                                   planeBytesPerRow, 
                                   nil,
                                   nil, nil, &_pixelBuffer);
CVPixelBufferLockBaseAddress(_pixelBuffer, 0);
CVPixelBufferRetain(_pixelBuffer);
    // Periodic texture cache flush every frame
CVOpenGLESTextureCacheFlush(_textureCache, 0);

// The Buffer cannot be used with OpenGL as either its size, pixelformat or attributes are not supported by OpenGL
 glActiveTexture(GL_TEXTURE0);
CVReturn err = CVOpenGLESTextureCacheCreateTextureFromImage(kCFAllocatorDefault, 
                                                            _textureCache,
                                                            _pixelBuffer,
                                                            NULL,
                                                            GL_TEXTURE_2D,
                                                            GL_LUMINANCE,
                                                            im.width,
                                                            im.height,
                                                            GL_LUMINANCE,
                                                            GL_UNSIGNED_BYTE,
                                                            0,
                                                            &_yTexture);

if (!_yTexture || err) {
    NSLog(@"CVOpenGLESTextureCacheCreateTextureFromImage failed (error: %d)", err);  
    return;
}
glBindTexture(CVOpenGLESTextureGetTarget(_yTexture), CVOpenGLESTextureGetName(_yTexture));
 CVPixelBufferUnlockBaseAddress(_pixelBuffer, 0);

但是错误是 -6638，文档只是声明由于不支持的缓冲区大小、像素格式或属性，像素缓冲区与 OpenGL 不兼容."这对我没有多大帮助.

But the err is -6638, the documentation simply states that "The pixel buffer is not compatible with OpenGL due to an unsupported buffer size, pixel format, or attribute." which does not help me much.

我该如何解决?

推荐答案

Apple 在 技术问答 1781

问题在于源像素缓冲区必须支持 IOSSurface.指定一个空字典作为 kCVPixelBufferIOSurfacePropertiesKey

The issue is that the source pixel buffer must be IOSSurface backed. Specify an empty dictionary as the value in kCVPixelBufferIOSurfacePropertiesKey

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