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I am working on a h264 video codec. I want to know: Is a single NAL unit in H264 equivalent to one video frame?
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The Network Abstraction Layer (NAL) is a part of the H. 264/AVC and HEVC video coding standards. The main goal of the NAL is the provision of a "network-friendly" video representation addressing "conversational" (video telephony) and "non conversational" (storage, broadcast, or streaming) applications.
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H. 264 or MPEG-4 AVC (Advanced Video Coding) is a video coding format for recording and distributing full HD video and audio. It was developed and maintained by the ITU-T Video Coding Experts Group (VCEG) with the ISO/IEC JTC1 Moving Picture Experts Group (MPEG).
Picture Parameter Set (PPS): Similar to the SPS, this non-VCL NALU contains information on entropy coding mode, slice groups, motion prediction, quantization parameters (QP), and deblocking filters.
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
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