Solve : Video Display HELP?

1.	Solve : Video Display HELP?
Answer» I am running WIN xp pro and I do a lot of Video Editting but I have a Q/A about Aspect Ratios and Pixels??? I always do video to be seen on a TV with a 4:3 Ratio Now if you capture Video to the computer every program says NTSC 4:3 Ratio will be 720 X 480 Pixels Now WARE I get lost is if you have a VHS Tape and play it on a 20 inch CRT TV or a 60 inch CRT TV it is still a 4:3 image and looks the same. And I understand that 4:3 means the image will be 4 times as wide as it is High. But how does the computer see it as a set pixel size like 720 x 480?Quote And I understand that 4:3 means the image will be 4 times as wide as it is High. No, it means a ratio of 4/3. For example, 100 x 75 would be an image where the ratio of width to height is 4/3. So, it's 1.33 times as wide as it is high. So, the numbers you got, "NTSC 4:3 Ratio will be 720 X 480 Pixels", are not quite accurate. 720 x 480 is not a 4:3 ratio, close, but not exactly. 640 x 480 would be a 4:3 ratio. 720 x 540 would be a 4:3 ratio. Quote But how does the computer see it as a set pixel size like 720 x 480? I don't know. Someone else will probably have an answer.Full screen NTSC dvd footage is usually 720x480 and fullscreen PAL dvd footage is usually 720x576. This footage is supposed be shown on a 4:3 TV... but these resolutions aren't 4:3 mathematically. The reason for this (I'm simplifying here) is due to the fact that TVs have rectangular pixels and when you show the above resolutions on a TV they will look 4:3. In practical terms it means that when you look at dvd resolution IMAGES (720x480, 720x576) on a PC monitor in programs like VirtualDubMod they do not have the correct pixel aspect ratio so they look a tiny bit squished/stretched in comparison to the way they look on a TV. This is normal. Some programs will correct this when they are displaying the footage by resizing it so it looks right but if you are viewing it with a "Square Pixels" option then it will look slightly wrong.

Answer»

I am running WIN xp pro and I do a lot of Video Editting but I have a Q/A about Aspect Ratios and Pixels???

I always do video to be seen on a TV with a 4:3 Ratio

Now if you capture Video to the computer every program says NTSC 4:3 Ratio will be 720 X 480 Pixels

Now WARE I get lost is if you have a VHS Tape and play it on a 20 inch CRT TV or a 60 inch CRT TV it is still a 4:3 image and looks the same.

And I understand that 4:3 means the image will be 4 times as wide as it is High.
But how does the computer see it as a set pixel size like 720 x 480?Quote

And I understand that 4:3 means the image will be 4 times as wide as it is High.

No, it means a ratio of 4/3. For example, 100 x 75 would be an image where the ratio of width to height is 4/3. So, it's 1.33 times as wide as it is high.

So, the numbers you got, "NTSC 4:3 Ratio will be 720 X 480 Pixels", are not quite accurate. 720 x 480 is not a 4:3 ratio, close, but not exactly. 640 x 480 would be a 4:3 ratio. 720 x 540 would be a 4:3 ratio.

Quote

But how does the computer see it as a set pixel size like 720 x 480?

I don't know. Someone else will probably have an answer.Full screen NTSC dvd footage is usually 720x480 and fullscreen PAL dvd footage is usually 720x576. This footage is supposed be shown on a 4:3 TV... but these resolutions aren't 4:3 mathematically. The reason for this (I'm simplifying here) is due to the fact that TVs have rectangular pixels and when you show the above resolutions on a TV they will look 4:3.

In practical terms it means that when you look at dvd resolution IMAGES (720x480, 720x576) on a PC monitor in programs like VirtualDubMod they do not have the correct pixel aspect ratio so they look a tiny bit squished/stretched in comparison to the way they look on a TV. This is normal. Some programs will correct this when they are displaying the footage by resizing it so it looks right but if you are viewing it with a "Square Pixels" option then it will look slightly wrong.

Solve : Video Display HELP?

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