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|| SportsShooter.com: Member Message Board
figuring out video fomats
Erik Markov, Photographer
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Kokomo | IN | | Posted: 1:41 PM on 01.30.10 |
->> wondering if anyone knows of a website that will help me figure out the video format proportions? I'm using premiere elements to do some stuff and I don't know all the format dimensions.
As an example, I don't know how to figure if I have my original video at 720x480 how to figure out the dimensions if I want to make it at a smaller size, but have the same dimensions.
Or if I have my video in a 16:9 format for an HD tv, figure out a smaller video size while still keeping that 16:9 format.
Thought someone might know of a website where I could plug in my format size and it would give me possible options of other sizes? |
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PF Bentley, Photographer
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Planet Earth | HI | USA | Posted: 1:55 PM on 01.30.10 |
->> Just the cut the dimensions in half and you're set.
So 1280x720 would be 640x360
720x480 would be 360x240, etc. |
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Jack Howard, Photographer, Photo Editor
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Central Jersey | NJ | USA | Posted: 2:08 PM on 01.30.10 |
->> Erik, here's a video I just did on cropping stills to 16:9 HD formats that may come in handy for you with this at a high level.
http://vimeo.com/9054018
The two main ratios for video right now are 4:3 (VGA) and 16:9 (HD).
Of course, SLRs are at 3:2 for stills and HD 16:9 (1920x1080 /1080p "Full HD" or 1280x720 720p HD), unless they are Four Thirds SLRs, then they are at 4:3 and there's not a full Four Thirds SLR shooting video.
But micro four thirds cameras such as the Oly E-P1 and Panny GF1 shoot stills at 4:3 and HD at 16:9 at 720p.
Throw WVGA (854x480) as a 16:9 "widescreen" but not HD variant into the mix and it's a mess of a mess until you get the hang of it.
http://en.wikipedia.org/wiki/Aspect_ratio_%28image%29
http://en.wikipedia.org/wiki/Wide_VGA
Good luck! |
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Shelley Cryan, Photographer
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New England | CT | USA | Posted: 3:22 PM on 01.30.10 |
->> Erik,
PF's right but you may need more options than just cutting in half. It might be helpful to use some math; that way you can make your video any size you want.
For example, say you want to reduce the 720x480 video you mention so it fits in a blog that's, say, 425px wide. Since you know the width, you just need to figure out the correct height given this width so the aspect ratio is maintained.
Divide the width you want by the width you have: 425px divided by 720 px equals .59. Now multiply that by the height you have: .59 times 480px equals 283px.
Result: your orignal 720 x 480px video should be resized to 425 x 283px to maintain the same ratio and fit in your blog.
Works for whatever width you need from whatever aspect ratio you start with; just plug the intended width into the formula above.
Shelley
www.shelleycryan.com |
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David Brooks, Photographer
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San Diego | CA | USA | Posted: 5:05 PM on 01.30.10 |
| ->> We've run into this same issue at work and I've just plugged the numbers into PS under file new, then type in the current size, then after the new file opens go back into image size and type in the number you want (make sure you have constrained proportions selected) and it will give you the the correct proportion for any size you desire. |
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PF Bentley, Photographer
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Planet Earth | HI | USA | Posted: 5:49 PM on 01.30.10 |
->> One trick for the best compression is to have the dimensions dividable by 4 or 16. This helps produce the best encoding.
The website's dimensions for the product should also be dividable by 4 or 16. |
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Myung Chun, Photographer
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Los Angeles | CA | USA | Posted: 7:29 PM on 01.30.10 |
| ->> The 720x480 sounds like SD which is non-square pixels. You can't just resize it with those proportions -- the image will look a little stretched and everyone will look slighty squat and portly. Resize it off 640x480 (4:3) dimensions, e.g. 320x240, 1280x960. |
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