Frame size X Pixel aspect ratio at DVinfo.net

Ron German · January 29th, 2010, 12:37 PM

When I try to up-convert (render) some 1280X720 files (some shots from my Pentax K-X) to integrate them in my documentary, mostly shot with a Canon HV 20 transcoded to Cineform intermediate codec 1440X1080 24p, how shoud I fill the Custom Settings regarding pixel aspect ratio to make a straight and correct convertion?
When I use the defaut 1,0000 pixel aspect ratio, the image from this transcoding (1280X720 to 1440X1080) appears distorted and with a letterbox.
And the oposite, how should be the custom settings to downconvert from 1440X1080 to 1280X720?
Is there any guide / table with the most used pixel aspect ratio convertions settings?
Thanks

Perrone Ford · January 29th, 2010, 12:47 PM

Take everything to square pixel and get rid of this stuff. Otherwise it will drive you NUTS.

Ron German · January 29th, 2010, 01:00 PM

Thank you Perrone, but I don`t understand you (my fault).
Can you please orient me step by step how to achieve a correct convertion - ie how to fill the custom setting page to render (for example 1280X720 to 1440X1080)?

Perrone Ford · January 29th, 2010, 01:13 PM

Quote:

Originally Posted by Ron German

Thank you Perrone, but I don`t understand you (my fault).
Can you please orient me step by step how to achieve a correct convertion - ie how to fill the custom setting page to render (for example 1280X720 to 1440X1080)?

1440x1080 is not square pixel. 1920x1080 is. The PAR that you use for HDV stretches the 1440x1080 to 1920x1080. So do that. Once you have real 1920x1080 footage, you can simply resize your 1280x720 to 1920x1080.

Bruce Phung · January 29th, 2010, 02:56 PM

Quote:

Originally Posted by Ron German

When I try to up-convert (render) some 1280X720 files (some shots from my Pentax K-X) to integrate them in my documentary, mostly shot with a Canon HV 20 transcoded to Cineform intermediate codec 1440X1080 24p, how shoud I fill the Custom Settings regarding pixel aspect ratio to make a straight and correct convertion?
When I use the defaut 1,0000 pixel aspect ratio, the image from this transcoding (1280X720 to 1440X1080) appears distorted and with a letterbox.
And the oposite, how should be the custom settings to downconvert from 1440X1080 to 1280X720?
Is there any guide / table with the most used pixel aspect ratio convertions settings?
Thanks

You render and output from 1280x720 footage to 1440x1080 right?. In that footage properties, you need to change it default setting 1.000 to 1.3333. This will match up with the HV20 1440x1080 with 1.3333. Give that a try.

Ron German · January 29th, 2010, 07:35 PM

Thank you guys.
Bruce, your sugestion worked perfectly.
What would be the the solution for the oposite situation (1440X1080 to 1280X720)?
Thank you again.

Bruce Phung · January 29th, 2010, 07:43 PM

well, you would have to down convert your 1440x1080 to 1280x720 and the same thing is to change the default setting to 1.0000 to match the other.

January 29th, 2010, 12:37 PM	#1
Ron German Major Player Join Date: Feb 2005 Location: Rio de Janeiro - Brasil Posts: 304	Frame size X Pixel aspect ratio When I try to up-convert (render) some 1280X720 files (some shots from my Pentax K-X) to integrate them in my documentary, mostly shot with a Canon HV 20 transcoded to Cineform intermediate codec 1440X1080 24p, how shoud I fill the Custom Settings regarding pixel aspect ratio to make a straight and correct convertion? When I use the defaut 1,0000 pixel aspect ratio, the image from this transcoding (1280X720 to 1440X1080) appears distorted and with a letterbox. And the oposite, how should be the custom settings to downconvert from 1440X1080 to 1280X720? Is there any guide / table with the most used pixel aspect ratio convertions settings? Thanks

January 29th, 2010, 12:47 PM	#2
Perrone Ford Inner Circle Join Date: Nov 2006 Location: Tallahassee, FL Posts: 4,100	Take everything to square pixel and get rid of this stuff. Otherwise it will drive you NUTS. __________________ DVX100, PMW-EX1, Canon 550D, FigRig, Dell Octocore, Avid MC4/5, MB Looks, RedCineX, Matrox MX02 mini, GTech RAID, Edirol R-4, Senn. G2 Evo, Countryman, Moles and Lowels.

January 29th, 2010, 01:00 PM	#3
Ron German Major Player Join Date: Feb 2005 Location: Rio de Janeiro - Brasil Posts: 304	Thank you Perrone, but I don`t understand you (my fault). Can you please orient me step by step how to achieve a correct convertion - ie how to fill the custom setting page to render (for example 1280X720 to 1440X1080)?

January 29th, 2010, 07:35 PM	#6
Ron German Major Player Join Date: Feb 2005 Location: Rio de Janeiro - Brasil Posts: 304	Thank you guys. Bruce, your sugestion worked perfectly. What would be the the solution for the oposite situation (1440X1080 to 1280X720)? Thank you again.

January 29th, 2010, 07:43 PM	#7
Bruce Phung Major Player Join Date: Dec 2009 Location: Rochester,NY USA Posts: 285	well, you would have to down convert your 1440x1080 to 1280x720 and the same thing is to change the default setting to 1.0000 to match the other.