XueshiQiao/h264format.md

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H.264 Annex B format and AVCC format

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h264format.md

AnnexB format:

([start code] NALU) | ( [start code] NALU) |

AVCC format:

([extradata]) | ([length] NALU) | ([length] NALU) |

In annexb, [start code] may be 0x000001 or 0x00000001.

In avcc, the bytes of [length] depends on NALULengthSizeMinusOne in avcc extradata, the value of [length] depends on the size of following NALU and in both annexb and avcc format, the NALUs are no different.

Ref: StackOverflow