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the analysis of some mp4 container boxes(stsd/avcC/stco...)

2019-11-09 18:16:38
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the analysis of some mp4 container boxes(stsd/avcC/stco...)

the stsd/avc1/avcC boxes:

the analysises of the stsd/avc1/avcc boxes are:

from the analysis, we can know

1. avc1 box data showed by this mp4info is fully included in the middle of stsd box showed by mp4info.

2. avcC box data is included to stsd box in this mp4info tool.

notice: 1. get to know the avcC box layout can refer to AVC Decoder Configuration Atom (‘avcC’) of QuickTime File Format Specification[2]2. the "AVC Decoder Configuration Record" field of avcC box is:

stco box

entry_count: is an integer that gives the number of entries in the following tablechunk_offset: is a 32 or 64 bit integer that gives the offset of the start of a chunk into its containingmedia file.from above, we can know the count of chunk in a media mp4 file is numerousreference1. Information technology — Coding of audio-visual objects —Part 12:ISO base media file format2. QuickTime File Format Specification

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