oglaf Posted April 19, 2017 Posted April 19, 2017 Hi, I'm experimenting with making my own higher-resolution discs to the BD ROM4 spec with triple-layer 100 GB capacity discs. Triple-layer discs imply two separate layer breaks. Without going into too many details, setting arbitrary layer breaks is important to me so that I can ensure that content encoded for the highest data rates are in the proper physical location on the burned disc. I don't have any BDXL hardware or TL media at the moment to test this myself, but does ImgBurn 2.5.8.0 support setting more than one arbitrary layer break based on sector sizes?
LIGHTNING UK! Posted April 20, 2017 Posted April 20, 2017 You can't move the layer break on BD media like you could with DVD+R DL media. Multi layer BD discs are to be treated like a huge single layer disc.
oglaf Posted April 20, 2017 Author Posted April 20, 2017 Thanks to our kind host for the info. The latest ROM4 specification for UHD discs includes a feature called "dual-zone formatting" where MPEG transport files closer to the outer edge of the disc are allowed to have higher maximum bit rates than content in a region near the center. It does require that mastered discs have layer breaks that might not be at the max sector size. I know from experience that regular Blu-ray discs (ROM2) could generally accommodate the layer break location being moved to the max sector size of layer 0 unless the project in question had certain rare characteristics such as seamlessly branching content located near the mid-point of the disc. ROM4 dual-zone seems like it's a different beast, at least at this stage of the product lifecycle. Would anyone else please share your experience with burned UHD dual-zone triple-layer discs that play correctly at >100 Mbps without authoring-assigned layer breaks?
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