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Add dby1 compatible brand to the ftyp box if muxing Dolby Content - #3369
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copybara-service[bot] merged 1 commit intoAug 24, 2026
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This updates both regular MP4 and fragmented MP4 writer paths so Dolby outputs advertise the expected compatible brand in the container header.
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Thanks, @microkatz! |
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The "compatible brands" is part of 'ftyp' box, which is defined in ISO 14496-12. The usage of 'dby1' (Dolby compatible brand) is in https://professionalsupport.dolby.com/s/article/How-to-signal-Dolby-Vision-in-ISOBMFF-format-AKA-mp4-container?language=en_US
This PR updates both regular MP4 and fragmented MP4 writer paths so Dolby outputs advertise the expected compatible brand in the container header.