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Shouldn't SD look half the size of HD?

cdnclub's picture
Last seen: 6 years 1 week ago
Joined: 10/13/2008 - 5:28pm

Hello everyone,

I am making the leap from SD to HD, just gotta buy the right camcorder. Anyways, I have been tinkering with HD editing. Doing some practice stuff and now I have a simple question with I hope a simple answer.

In SVP 9.0 I have imported some native HDV footage (1440x1080) and the project properties are the same (1440 x 1080). It all looks great. But just for fun I imported some SD footage (720x480). I expected the SD footage to take up a much smaller portion of the screen. It looks like the native 480 pixel height is now at least double. What is going on here?

Thanks,

Eric


rs170a's picture
Last seen: 2 days 4 hours ago
Joined: 03/07/2011 - 2:12pm

Vegas automatically scales all stills and video up to the project properties settings.

If you want to keep your SD footage at the original size, open up the Pan/Crop window and resize it there.

Mike




cdnclub's picture
Last seen: 6 years 1 week ago
Joined: 10/13/2008 - 5:28pm

rs170a wrote "Vegas automatically scales all stills and video up to the project properties settings".

Well, I guess that means that Vegas essentially "blows-up" SD to at least 2x it's original picture.

I'll try to do the crop/resizing thing and keep all SD video on a separate video track so I won't have to resize each clip.

Thanks again,

Eric


Yvon Robert's picture
Last seen: 1 year 3 months ago
Joined: 10/17/2010 - 1:35am

Hi,

Simple answer is:

SD video is 720x480 pixels. Your native quality is 1440 x 1080. This is 4 times better quality. (2 x 2) What is the software do in the back? It is use your SD and blow up to 2 times factor a specail algorithm do this and place like antialiasing function producing an appreciable quality. Some paint program do the same, blow up a factor 2 and scale down a factor of 2 the picture looks great we call it INTERPOLATION .

Regards,

YR


cdnclub's picture
Last seen: 6 years 1 week ago
Joined: 10/13/2008 - 5:28pm

Playing around with Vegas tonight and 720x480 superimposed on a 1440x1080 screen size does look a tad small. Probably a good thing that Vegas resizes the SD.

Your explanation signmax does help. Thanks.