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Offiial ISO Base Media File Format documentation, official documentation of MP4RA brands registrar for BMFF and documentation of Library of Congress for long term archiving specs |
Explanation of official MP4RA registar and ISO jargon. BRANDS. |
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* HEIF, High Efficiency Image File Format. Some internal structures required for HEIF were added into the ISO_BMFF specification in a 2018 amendment. (ISO/IEC 14496-12:2015/Amd 2:2018)
'''BMFF HEIC/HEIX Registered Brands'''
Specific implementations of HEIF encoding are registered by MP4RA and are officially called "brands".
According to official specifications Apple HEIC registered brand is using Main or Main Still Picture profile of HEVC with an 8-bit per channel color depth and chroma subsampling of 4:2:0, while Sony and Canon HIEX registered brand may additionally increase the bit-depth to 10 bits per channel and chroma subsampling to 4:2:2 or 4:4:4.
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