kikker
22nd May 2007, 02:02
I have a number of videos I'd like to re-encode for a portable device. Staxrip, for instance, will let me resize to a width of 320 and a height, which should be a multiple of 16 for best quality. That's fine. What I don't understand is why Staxrip complains that the aspect ratio of the re-encode deviates presumably above some pre-determined threshold percentage from the source aspect ratio. In other words, it wants me to crop the original so that the aspect ratios of the source and the target differ by not much more than 1% or so.
Is this done to enhance the quality of the encode? Why should it care what the AR of the source is, even if it's around a 2% difference in the AR? In order to satisfy this threshold I could of course just resize the target a bit, but then I would violate the '16 rule', so I just crop the source. But, I still don't know why it's necessary.
Is this done to enhance the quality of the encode? Why should it care what the AR of the source is, even if it's around a 2% difference in the AR? In order to satisfy this threshold I could of course just resize the target a bit, but then I would violate the '16 rule', so I just crop the source. But, I still don't know why it's necessary.