View Single Post
Old 26th November 2011, 18:26   #19  |  Link
hello_hello
Registered User
 
Join Date: Mar 2011
Posts: 4,821
Quote:
Originally Posted by Asmodian View Post
Do you have a reason to assume the blurays do it correctly more often then DVDs?
I guess the square pixel thing has me assuming. I hope it's a reasonable one.

I'll admit I did some more thinking on this topic due to this thread, and I must admit that living in PAL-land there's a chance I'm making too quick an assumption the same thing also applies to NTSC DVDs. I have encoded quite a few of them, and I'm sure I've got a few lying around I'll be revisiting again due to this thread, but if the aspect ratio of Bluray discs can be taken as accurate, then in PAL-land at least, I'm absolutely certain by far the majority of discs use straight 16:9 or 4:3 resizing.

PAL actually has "digital" pixel aspect ratios, which differ from those vampiredom posted, and if memory serves me correctly they resize to exactly 16:9 or 4:3, although I'm not sure I actually understand them fully yet (cause of the 720 vs 704 width thing).
http://en.wikipedia.org/wiki/Pixel_a..._video_formats
They also seem to be the same pixel aspect ratios used in digital PAL SD TV.
http://en.wikipedia.org/wiki/Standar...ion#Resolution
Now didn't vampiredom post something about DVDs, digital TV and editing software all using the same standard?

For NTSC the PARs are always the same as those vampiredom posted so if NTSC discs do use straight 16:9 or 4:3 resizing the reason for it is something I'm still yet to learn.... maybe I'm just plain wrong about the way NTSC disc are resized.
I'm very tired at the moment though, I'll have to think about this some more tomorrow. In the meantime, comments anyone?
hello_hello is offline   Reply With Quote