In h264 NAL units means frame.?

I am working on a h264 video codec. I want to know开发者_运维知识库: Is a single NAL unit in H264 equivalent to one video frame?

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No, a sequence of NAL units can be decoded into video frames, but they are not equivalent.

http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC

http://en.wikipedia.org/wiki/Network_Abstraction_Layer#NAL_Units_in_Byte-Stream_Format_Use

http://wiki.multimedia.cx/index.php?title=H.264