1280 x 720 - Square Pixels?

E

effstops

New member
Hey there, I'm wondering if there's any way to achieve true, square-pixel 1280 x 720 resolution with the HVX... and be able to shoot at 60p.

I know I can shoot 1080, view it distorted in square pixels and then scale the vertical axis down 66.6%, to get from 1080 to 720. This achieve a pretty nice square-pixel, 1280 x 720 image, but I can only shoot as fast as 30p.

However, if I shoot at 720p60, the true horizontal resolution is less than 1280 due to the pixel aspect ratio. I'm just trying to get the highest quality image I can. So I was wondering, is there any midground between the two modes? Is there any way to shoot 1280 x 720 at 60p, without the PAR?

Hope that makes sense. Thanks a lot!

--Colin
 
If you capture the footage through the component output that's 1280x720. So if you used a NanoFlash or XDR or CineForm recorder, that would be 1280x720.
 
Thanks Barry! Very interesting. Those options are bit out of my price range, but it's good to know that it's a possibility.

--Colin
 
I haven't had a chance to try this yet, but how do you get to the raw 1280x1080 DVCproHD stuff without it being stretched?

I was thinking that if you did your own resizing of the raw file down to 1280x720 at least the 720p footage would look a bit more resolute? Probably wrong here.

nanoFlash for full 1080 (1920x1080) frame still could be a nice one.
 
Hey Kholi, if I'm understanding you correctly I think you're right. Resizing the native 1280 x 1080 stream to 1280 x 720 results in a more detailed image than shooting regular 720p at 960 x 720 (which is stretched to 1280 x 720 due to the pixel aspect ratio).

So that would be great, except for what I'm doing I need to be able to shoot at variable frame rates (specifically 60p), so I can't shoot 1080 and resize.

And for your question, "how do you get to the raw 1280x1080 DVCproHD stuff without it being stretched," it's a matter of changing the clip's pixel aspect ratio in its properties, from 1.5 to 1, or to square pixels. However, it does look squeezed at that point, which is why you must then manually scale the vertical axis down to get to the final resolution of 1280 x 720. I'm doing the resizing in After Effects.

I hope that's clear! Let me know if that answers your question.

--Colin
 
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