 Conventional or pre-BD-XL Blu-ray Discs contain 25 GB per layer, with dual-layer discs (50 GB) being the industry standard for feature-length video discs.Triple-layer discs (100 GB) and quadruple-layer discs (128 GB) are available for "BD-XL" re-writer drives.High-definition (HD) video may be stored on Blu-ray Discs with up to 1920×1080 pixel resolution, at 24 progressive, or 50/60 interlaced, frames per second.