videoToolBox解码H264

NALU:Coded H.264 data is stored or transmitted as a series of packets known as NetworkAbstraction LayerUnits. (NALU单元)

  RBSP :A NALU contains a Raw Byte Sequence Payload, a sequence of bytes containingsyntax elements.(原始数据字节流)

  SODB:String Of Data Bits (原始数据比特流, 长度不一定是8的倍数,故需要补齐)

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