Question

如何把CMSampleBufferRef 转化为 NSData或者UIimage

Answer 1

参考如下：
CMBlockBufferRef blockBufferRef = CMSampleBufferGetDataBuffer(sampleBuffer);
size_t length = CMBlockBufferGetDataLength(blockBufferRef);
Byte buffer[length];
CMBlockBufferCopyDataBytes(blockBufferRef, 0, length, buffer);
NSData *data = [NSData dataWithBytes:buffer length:length];