DV Camcorder shoots in 4:3 but Ulead creates 720x480

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gfpstudios

DV Camcorder shoots in 4:3 but Ulead creates 720x480

Post by gfpstudios »

My GRD 372 JVC DV Camcorder shoots in 4:3 format but Ulead Video Studio 4SE captures in 720x480. The resultant images and video are always just slightly distorted because the aspect ratio is altered slightly with the capture. I have tried to find a program to correct this but to no avail. Does everyone just live with this problem or is there a solution. I tried most codecs; I even specify the 640x480 to match the 4:3 native ratio of the camera but the software simply ignores the template change. What is up with this???

(My old Media Studio Pro 5.2 likes 640x480 but I can't get it to read anything that the VS 4SE produces....probably another issue for another thread)??
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Post by DVDDoug »

All commercial DVDs are 720x480 (here in NTSC land). Both fullscreen and widescreen DVDs are 720x480! ...The pixels are not square. 620x480 is not valid per the DVD spec.

If the images don't look right on your computer monitor, they might be OK on your TV. For some reason (I don't know why) images on my LCD monitor are distorted, but they were OK on my previous CRT monitor.
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gfpstudios

720x480

Post by gfpstudios »

I see your point but if this is true then about 10% of the commercial dvd images/video are being cut off the sides of TV sets with 4:3 aspect ratios.

My logic goes like this: 720 - 640 = 80; and 80/720 = ~11% or the amount that goes beyond the sides of the TV tube. The other issue is that this would be fine except that when you shoot with a DV Camcorder at 640x480 (a.k.a. 4:3) then when you upload to a computer the software stretches the imagery to 720x480.

And btw I am not trying to make DVDs. I am only trying to upload DV footage so I can edit it. I may backload it to the camera; or save it to a file on the hard disk; or even put it on a CD.
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Post by DVDDoug »

I forgot to mention that DV is 720x480 too. And, a "capture" from DV tape to AVI/DV is really just a data-transfer. If you save the file back to DV tape, and play if from your camcorder to the TV, it should look identical to the original.

The approximate 10% overscan on a TV is for both horizontal and vertical.
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Re: 720x480

Post by skier-hughes »

gfpstudios wrote:I see your point but if this is true then about 10% of the commercial dvd images/video are being cut off the sides of TV sets with 4:3 aspect ratios.

My logic goes like this: 720 - 640 = 80; and 80/720 = ~11% or the amount that goes beyond the sides of the TV tube. The other issue is that this would be fine except that when you shoot with a DV Camcorder at 640x480 (a.k.a. 4:3) then when you upload to a computer the software stretches the imagery to 720x480.

And btw I am not trying to make DVDs. I am only trying to upload DV footage so I can edit it. I may backload it to the camera; or save it to a file on the hard disk; or even put it on a CD.
As DVDDoug has said dv on your cam will be 720x480 or 720x576 here in PAL land. So no stretching or squashing etc takes place.

This is exactly the same for 4.3 or even 16.9, which is very hard to explain here on a forum, so I suggest you do a little googling, but this is a good site to start with.

http://www.adamwilt.com/
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