Mister Hatt wrote:Why do you care about mod16?
Actually... I would say it's because in computing, 16 is a magical numberThe website above wrote:Modern digital video applications such as DV, DVD and digital television (DVB, ATSC) often use MPEG-1 or MPEG-2 formats (or their derivatives) which are all based on 16×16 pixel macroblocks. Having the height and width of the image readily divisible by 16 makes it easier and more efficient for an MPEG encoder to compress video.
so are 2, 4 , 8, 16, 32, 64, 128, 256, 512...
Mister Hatt wrote:Also, the DVD aspects are all wrong. You're not taking the active picture region into account.
The website above wrote:...the difference between the correct aspect ratio and a wrong aspect ratio is often small enough to go unnoticed unless you really start looking for it.