When I’m converting various files to DivX format I’ve been using 640 x 360 resolution but I’ve noticed that most files I download are encoded at 624 x 352. I’ve read somewhere that it’s because that resolution is completely divisible by 16x16 blocks while 640x360 will only go to 8x8.
My question is “so what?”
Why is it important to have resolution divisible by 16 x 16? What do I risk using resolutions that only go 8 x 8 such as 640 x 360? Do I risk the file being unplayable somewhere?