HD Aspect Ratio?

What’s the pixel aspect ratio for Widescreen (16:9) NTSC HDV (19201080)? It’s not in Blender’s presets. I don’t mean the 16:9 aspect ratio, pixel aspect is different (for example, NTSC DV 4:3 720480 is 10:11).

1 to 1 if you render 1920x1080 or 1280x720 since they already contain enough square pixels to make the right size.

16:9 is the Aspect Ratio for 1920 x1080 & 1280 x 720. Here is the complete list of Pixel Aspect Ratios from Adobe After Effects composition settings menu:

D1/DV NTSC (0.9)

D1/DV NTSC Wide Screen (1.2)

D1/DV PAL (1.07)

D1/DV PAL Wide Screen (1.42)

Anamorphic 2:1 (2)

D4/D16 Standard (0.95)

D1/D16 Anamorphic (1.9)

And here is an explanation of Aspect Ratio v.s. Pixel Aspect Ratio directly from After Effects help files. Note: Frame Aspect Ratio is the same thing as Pixel Aspect Ratio.

Pixel aspect ratio specifies the ratio of width to height of one pixel in an image. Frame aspect ratio describes the ratio of width to height in the frame dimensions of an image. For example, D1 NTSC has a pixel aspect ratio of 0.9 (or 0.9 width by 1.0 height). It also has a frame aspect ratio of 4:3 (or 4.0 width by 3.0 height).

Some video formats output the same frame aspect ratio but use a different pixel aspect ratio. For example, some NTSC digitizers produce a 4:3 frame aspect ratio, with square pixels (1.0 pixel aspect ratio), and a resolution of 640 x 480. D1 NTSC produces the same 4:3 frame aspect ratio but uses rectangular pixels (0.9 pixel aspect ratio) and a resolution of 720 x 486. D1 pixels, which are always rectangular, are vertically oriented in systems producing NTSC video and horizontally oriented in systems producing PAL video.

If you display rectangular pixels on a square-pixel monitor without alteration, images and motion appear distorted; for example, circles distort into ovals. However, when displayed on a broadcast monitor, the images are correct.

Thank you masterhoshi.

RamboBaby: Yes, I understand the difference, I just needed the pixel aspect ratio.

Note: Frame Aspect Ratio is the same thing as Pixel Aspect Ratio.

Don’t you mean not the same thing?

Interesting read on HDTV standards. And yes, looks like the native PIXEL aspect ratio is 1:1. (Scroll down to technical details on the page).

Gotta admit, 1:1 is a much better aspect to work with. Especially if you create some visual elements in tools like Flash, GIMP, Photoshop (Pre-CS). All that resizing and scaling just to make things squish and stretch afterwards can be a bit mind-boggling.

1:1, as it should be :smiley:

(Note: Wikipedia does mention a 1.33 ratio for what it calls “low-end” consumer products. So beware.)