Aspect HD to DV letterbox: settings? at DVinfo.net

Alex Raskin · June 29th, 2006, 08:58 AM

Have Aspect HD 1440x1080i30 video (16x9 of course).

Need to quality downconvert to DV 720x480 4x3 letterboxed.

Created a standard 4x3 NTSC project in PPro 1.5.1, imported AHD video, placed it in the timeline, applied 34% scale in Motion section.

Looks OK on screen - letterboxed and correct proportions, as needed.

Trying to export in Microsoft DV (is that the one I should use?) all sorts of distortions creep in.

Proportions are now all wrong; video has pillar boxes on top of letterboxes; etc.

What are the correct export settings for my purpose - quality downconvert to DV 720x480 4x3 letterboxed?

Chris Barcellos · June 29th, 2006, 09:38 AM

Suggestion: I use PPro 2.0 now, but if you are down converting a 16:9 HD to DV, why not open a project as HDV, import the file you want to down convert, then use 16:9 DV as an output/rendered file from the original project ? Why go through the motion menu process. Are you saying that gives you the distorted file? If so, output it to a standard 4:3 DV file. Try those, and I think one will work.

Alex Raskin · June 29th, 2006, 09:41 AM

Chris, I need 4x3 DV letterboxed out of the 16x9 AspectHD.

And I can't make it work, need to know exact export settings from PPro.

David Newman · June 29th, 2006, 09:54 AM

Don't mess with new 4x3 projects and motion. From your original HD project simply export movie to 4x3 DV 720x480 with a 0.9 pixel ratio. The letterboxing will be added automatically.

Alex Raskin · June 29th, 2006, 11:12 AM

Thanks David, your suggestion worked.

However the resulting video displays very visible "running" line edge artifacts on horizontal/diagonal objects.

Is that a problem with PPro downconversion? Output DV settings are at 100% quality though.

David Newman · June 29th, 2006, 11:34 AM

You could also do a CineForm export to the same format to see if it is DV issue or a scaler issue. If is it simply aliasing you can place a blur filter (radius 2 will be ok) to limit aliasing.

Alex Raskin · June 29th, 2006, 01:09 PM

Fantastic! With Fast Blur at 2.0 amount, no more running edges on DV copy!

Once again, thanks David!

June 29th, 2006, 08:58 AM	#1
Alex Raskin Trustee Join Date: Sep 2003 Posts: 1,435	Aspect HD to DV letterbox: settings? Have Aspect HD 1440x1080i30 video (16x9 of course). Need to quality downconvert to DV 720x480 4x3 letterboxed. Created a standard 4x3 NTSC project in PPro 1.5.1, imported AHD video, placed it in the timeline, applied 34% scale in Motion section. Looks OK on screen - letterboxed and correct proportions, as needed. Trying to export in Microsoft DV (is that the one I should use?) all sorts of distortions creep in. Proportions are now all wrong; video has pillar boxes on top of letterboxes; etc. What are the correct export settings for my purpose - quality downconvert to DV 720x480 4x3 letterboxed?

June 29th, 2006, 09:38 AM	#2
Chris Barcellos Inner Circle Join Date: Nov 2005 Location: Elk Grove CA Posts: 6,838	Suggestion: I use PPro 2.0 now, but if you are down converting a 16:9 HD to DV, why not open a project as HDV, import the file you want to down convert, then use 16:9 DV as an output/rendered file from the original project ? Why go through the motion menu process. Are you saying that gives you the distorted file? If so, output it to a standard 4:3 DV file. Try those, and I think one will work. __________________ Chris J. Barcellos

June 29th, 2006, 09:54 AM	#4
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	Don't mess with new 4x3 projects and motion. From your original HD project simply export movie to 4x3 DV 720x480 with a 0.9 pixel ratio. The letterboxing will be added automatically. __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

June 29th, 2006, 11:34 AM	#6
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	You could also do a CineForm export to the same format to see if it is DV issue or a scaler issue. If is it simply aliasing you can place a blur filter (radius 2 will be ok) to limit aliasing. __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

June 29th, 2006, 09:41 AM	#3
Alex Raskin Trustee Join Date: Sep 2003 Posts: 1,435	Chris, I need 4x3 DV letterboxed out of the 16x9 AspectHD. And I can't make it work, need to know exact export settings from PPro.

June 29th, 2006, 11:12 AM	#5
Alex Raskin Trustee Join Date: Sep 2003 Posts: 1,435	Thanks David, your suggestion worked. However the resulting video displays very visible "running" line edge artifacts on horizontal/diagonal objects. Is that a problem with PPro downconversion? Output DV settings are at 100% quality though.

June 29th, 2006, 01:09 PM	#7
Alex Raskin Trustee Join Date: Sep 2003 Posts: 1,435	Fantastic! With Fast Blur at 2.0 amount, no more running edges on DV copy! Once again, thanks David!