Why do some discs require side flipping? Can DVDs hold four hours per side?
Even though DVD’s dual-layer technology (see 3.3) allows over four hours of continuous playback from a single side, some movies are split over two sides of a disc, requiring that the disc be flipped partway through. Most “flipper” discs exist because of producers who are too lazy to optimize the compression or make a dual-layer disc. Better picture quality is a cheap excuse for increasing the data rate; in many cases the video will look better if carefully encoded at a lower bit rate. Lack of dual-layer production capability is also a lame excuse; in 1997 very few DVD plants could make dual-layer discs, but this is no longer the case. No players can automatically switch sides, but it’s not needed since most movies less than 4 hours long can easily fit on one dual-layer (RSDL) side. There is a list of “flipper” discs in the Film Vault at DVD Review. Note: A flipper is not the same as a disc with a widescreen version on one side and a pan & scan version or supplements on the other. Pleas
Even though DVD’s dual-layer technology (see 3.3) allows over four hours of continuous playback, some movies are split over two sides of a disc, requiring that it be flipped partway through (no players can automatically flip the disc yet). This is usually because the producers were too lazy to optimize the compression or to make a dual-layer disc. Better picture qual;ity is a lame excuse for increasing the data rate; in many cases the video will look better if carefully encoded at a lower bit rate. Lack of dual-layer production capability is also a lame excuse; at first very few DVD plants could make dual-layer discs but this is no longer the case. Unless a movie is more than 4 hours long, it can easily fit on one dual-layer disc. The following movies require flipping. (Note: This is note the same as a disc with a widescreen version on ne side and a pan & scan version on the other.
