HD Rendering question

[Danny Hays]

[Danny Hays]

OOPS.
What camera did you shoot with? Most Sony and Panasonic HDV cameras are 1440 x 1080i, where JVC are usualy 1280 x 720P. Look in your camera manual and see what it shoots. 1440 x 1080 is the same aspect ratio as 1920 x 1080 except the pixels are not square. 1920 x 1080 uses square pixels where 1440 x 1080, the pixels are 1.333 x 1. Multiply 1440 by 1.333 and you get 1920, well very close. But you can de-interlace by setting your project settings like this.

Fast moving interlaced video looks like this,

Where progresive looks like this.

I set de-interlace method to “Interpolate” in this case since she was moving fast, where if I set it to blend, it would be alot blurier. Try both and see which works best for your project.
Also make sure you render to progressive as well. Hope this helps, Danny Hays

[Paul Gregory]

The video was shot on a Sony HDR XR550. The manual says it can record HD at the following settings.

HD FX,
HD FH,
HD HQ,
HD LP with 5.1 or
HD LP 2 channel.

I can’t see in the manual what resolution or pixel ratios are used. It does say that the HD output can be set to Auto, 1080p,1080i,720p or 480p

Thanks in advance

[Danny Hays]

Sony specs say it shoots 1920 x 1080i but not 1080P. You can recapture it with the project settings in my picture except 1920 x 1080 and square pixels and everything else like my pic, and get a little better quality, since it does 1920x1080i.

[John Rofrano]

You have a few misconceptions so let’s start there:

[Paul Gregory] “Apparently I shot my first HD video using the default setting that appears to be 1440x 1080i. I would like my projects to be of the highest quality which I understand is 1920x1080P. I know that my TV & camcorder can display this quality.”

1440×1080 and 1920×1080 are the same size. 1440×1080 uses non square pixels that are 1.333 pixels wide. If you do the math, 1.333 times 1440 equals 1920. Technically there is less information being stored so you could argue that 1920 is higher quality than 1440 but only if your camera has a sensor that is capable of recording 1920. A lot of cameras extrapolate to that resolution so it’s not that simple.

[Paul Gregory] “Am I correct in assuming that there is no point at all in rendering out this or any other project to a higher resolution than what it was shot in”

In general that is correct, but 1920×1080 is not a higher resolution than 1440×1080. It is the same resolution due to the use of non-square pixels at 1440×1080. It is safe to render 1440 to 1920.

[Paul Gregory] “I wanted to render out my project as a M2TS file which should be the same as the original. I use the Sony AVC as file type, but what template do I us to get the file progressive?”

You don’t want to make it progressive if your source was not progressive. TV’s are interlaced devices. Yes, some newer LCD TV’s can display progressive but you will not see any difference in quality watching interlaced footage on an interlaced TV. TV’s are the whole reason interlacing was invented in the first place.

To get the highest quality you should deliver in the same format that you shot. If you shot 1440×1080-60i then you should deliver 1440×1080-60i.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Adam Sorbin]

Hi John Rofrano,

I’ve been searching this forum for a while, and your following statement comes the closest to answering my question.

John Rofrano wrote: To get the highest quality you should deliver in the same format that you shot. If you shot 1440×1080-60i then you should deliver 1440×1080-60i.

I have Sony Vegas 8.0, For shooting video, I use the Sony FX7 and Sony V1U Cameras, 1440×1080-60i.

I use “HDV capture” to capture them to Sony Vegas 8.0, My project settings are “HDV 1080-60i”, 29.970 (NTSC).

Then I edit the clips, and render out the default “MPEG-2 HDV 1080-60i” setting, and it renders into .M2T files.

Then I watch them on VLC or Windows Media Player.

They are horribly interlaced.

What am I doing wrong?

Specs:
Sony Vegas Pro 8
Sony V1U, Sony FX7
Windows XP
Acer 32″ TV (DVI compatible, connected through DVI).

Your help would solve a MAJOR hurdle for me!

[John Rofrano]

[Adam Sorbin] “They are horribly interlaced.
What am I doing wrong?”

You probably don’t have VLC set up to deinterlace on playback. It’s on the Video tab in the Preferences.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Adam Sorbin]

That’s right, actually that’s another thing, in VLC I have to do the Deinterlace filter EACH time. I’ve reset preferences many times and also set it under Options>Video>Filter, etc.

Anyway, my problem is how can I send this video to Clients who don’t know much about VLC/Deinterlace? I just want them to be able download the .Mpeg file or pop the DVD and watch it on their computer, without them getting upset about the video quality…because it is interlacing.

[John Rofrano]

[Adam Sorbin] “Anyway, my problem is how can I send this video to Clients who don’t know much about VLC/Deinterlace? I just want them to be able download the .Mpeg file or pop the DVD and watch it on their computer, without them getting upset about the video quality…because it is interlacing.”

That’s two separate situations:

If you want them to download a file to watch, I recommend that you render to Sony AVC using the Internet 16:9 720-30p template. That’s plenty of quality for them to see your work and the encoder will deinterlace for you so the file will not be interlaced.

If you want to send them a DVD, then the DVD player on their PC will deinterlace for you because all DVD’s are interlaced so it will be expecting it and it will handle it properly.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Adam Sorbin]

Bingo!

Thanks John, that perfectly answers my question.