HDV aspect ratio at DVinfo.net

Johan Hoogendoorn · May 29th, 2008, 03:42 PM

Hi Guys,
I'm working with footage from my new HVR V1E in After Effects, but am wondering how I should deal with the HDV aspect ratio of 1,33.
So my project/comps are 1440x1080 in aspect 1,33
However when I export as mov (ie photoJpeg or h264) the image is too high, of course.
My question is: where should I stretch the pixels out?
should I define the project as 1915x1080 and render that out.. ?
..or am I missing something else..?
regards,
Johan

Shaun Roemich · May 29th, 2008, 04:04 PM

HD AR for 1920 x 1080 is 1.78
1440 x 1080 is the spatially compressed (in codec) way that many HD codecs save precious bits, creating AR of 1.33 mathematically, to be extracted to 1920 x 1080 using a PAR of 1.2

Graham Hickling · May 29th, 2008, 09:03 PM

I recall the behavior of AfterEffects regarding the pixel aspect ratio changed recently - I think between AE7 and CS3. In the latest version you should be able to specify the correct PAR for the imported files using 'interpret footage'....with older versions you specify it at the export stage. I think.

Johan Hoogendoorn · June 14th, 2008, 12:38 PM

Yes, the correct PAR is/can be specified in the 'interpret' dialog. It is 1,33

so just to be sure: the correct way to operate is:
- working with the footage in 1,33 PAR, with Pixel Aspect Ratio Correction ON
- making a new comp, 1920 x 1080 square pixels
- dragging the actual comp in the new one, make fit
- render it out.

is that right? are there other (better) ways tot do it?

regards,
Johan

May 29th, 2008, 03:42 PM	#1
Johan Hoogendoorn New Boot Join Date: May 2008 Location: Amsterdam, the Netherlands Posts: 9	HDV aspect ratio Hi Guys, I'm working with footage from my new HVR V1E in After Effects, but am wondering how I should deal with the HDV aspect ratio of 1,33. So my project/comps are 1440x1080 in aspect 1,33 However when I export as mov (ie photoJpeg or h264) the image is too high, of course. My question is: where should I stretch the pixels out? should I define the project as 1915x1080 and render that out.. ? ..or am I missing something else..? regards, Johan

May 29th, 2008, 04:04 PM	#2
Shaun Roemich Inner Circle Join Date: Sep 2002 Location: Vancouver, British Columbia (formerly Winnipeg, Manitoba) Canada Posts: 4,088	HD AR for 1920 x 1080 is 1.78 1440 x 1080 is the spatially compressed (in codec) way that many HD codecs save precious bits, creating AR of 1.33 mathematically, to be extracted to 1920 x 1080 using a PAR of 1.2 __________________ Shaun C. Roemich Road Dog Media - Vancouver, BC - Videographer - Webcaster www.roaddogmedia.ca Blog: http://roaddogmedia.wordpress.com/

May 29th, 2008, 09:03 PM	#3
Graham Hickling Trustee Join Date: May 2004 Location: Knoxville, Tennessee Posts: 1,669	I recall the behavior of AfterEffects regarding the pixel aspect ratio changed recently - I think between AE7 and CS3. In the latest version you should be able to specify the correct PAR for the imported files using 'interpret footage'....with older versions you specify it at the export stage. I think.

June 14th, 2008, 12:38 PM	#4
Johan Hoogendoorn New Boot Join Date: May 2008 Location: Amsterdam, the Netherlands Posts: 9	Yes, the correct PAR is/can be specified in the 'interpret' dialog. It is 1,33 so just to be sure: the correct way to operate is: - working with the footage in 1,33 PAR, with Pixel Aspect Ratio Correction ON - making a new comp, 1920 x 1080 square pixels - dragging the actual comp in the new one, make fit - render it out. is that right? are there other (better) ways tot do it? regards, Johan