[Feature Request]实时视频想捕获图像或者录制视频，怎么实现呢。尝试用captureAProcessedFrameData捕获图像，崩溃报错“EXC_BAD_ACCESS”

[celiaDeveloper]

看之前的分享，尝试用下面的方法获取图片加完滤镜后的结果，是可以获取到UIImage的
` gpuSourceImage->Render();
unsigned char* res = gpuSourceImage->captureAProcessedFrameData(beauty_face_filter_);
int imageWidth = gpuSourceImage->getRotatedFramebufferWidth();
int imageHeight = gpuSourceImage->getRotatedFramebufferHeight();

// make data provider with data.
CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, res, imageWidthimageHeight4, NULL);

// prep the ingredients
int bitsPerComponent = 8;
int bitsPerPixel = 32;
int bytesPerRow = 4 * imageWidth;
CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;

// make the cgimage
CGImageRef imageRef = CGImageCreate(imageWidth, imageHeight, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);

// then make the uiimage from that
UIImage *image = [UIImage imageWithCGImage:imageRef];`

基于上面的思路，对实时视频实现捕获图像，SourceRawDataInput也可以调用captureAProcessedFrameData这个方法，于是用下面的方法尝试捕获图像，但是直接崩溃在第一行，崩溃信息是“Thread 1: EXC_BAD_ACCESS (code=1, address=0x0)”
` unsigned char* res = gpuPixelRawInput->captureAProcessedFrameData(beauty_face_filter_);
int imageWidth = gpuPixelRawInput->getRotatedFramebufferWidth();
int imageHeight = gpuPixelRawInput->getRotatedFramebufferHeight();

// make data provider with data.
CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, res, imageWidthimageHeight4, NULL);

// prep the ingredients
int bitsPerComponent = 8;
int bitsPerPixel = 32;
int bytesPerRow = 4 * imageWidth;
CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;

// make the cgimage
CGImageRef imageRef = CGImageCreate(imageWidth, imageHeight, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);

// then make the uiimage from that
UIImage *image = [UIImage imageWithCGImage:imageRef];`

友友们，怎么实现捕获图像和录制视频呢