360x240

Akashio · Post by **Akashio** » Wed Mar 12, 2003 10:15 pm

How can people make a 360x240 mpg? 360 isnt a multiple of 16 and TMPGEnc doesn't let you use 360.

RadicalEd0 · Post by **RadicalEd0** » Wed Mar 12, 2003 10:21 pm

you dont
you use 352x240 instead and like it
thats just the way of mpeg

Besides, 360x240 is useless, it isnt supported by vcd or dvd, and its only 4:3 on an ntsc tv, which you're only going to see it on from a vcd or dvd... meaning .. its useless :|

Synthangel · Post by **Synthangel** » Thu Mar 13, 2003 3:28 pm

I've got a question. If I wanna make MPEG encodes of my video, but want a higher resolution than 352x240. Is there another resolution that I can use or is that basically it?

RadicalEd0 · Post by **RadicalEd0** » Thu Mar 13, 2003 3:39 pm

Mpeg 1 is best at 352x240 max, higher than that is mpeg 2's domain. Sure you can make an mpeg 1 at 448x336 or any other mod16 resolution, but it wont be super awesome great.
If you're not making it 704x480, 720x480, or 352x240 then make sure to make it true 4:3 (like 320x240, 448x336, 512x384, 640x480 etc), because the aforementioned resolutions are the only ones supported by tvs and tvs are the only devices that use non square pixels in such a way that 1.4666:1 is really 4:3.
umm.. yeah

The Wired Knight · Post by **The Wired Knight** » Thu Mar 13, 2003 3:56 pm

I only encode in 352x240 mpegs for distribution as they are watchable quality with a smaller file size. For cons though I will encode in full 720x480 AVIs for maximum quality.

Quu · Post by **Quu** » Thu Mar 13, 2003 4:40 pm

most people that i have seen who use 360x240 do it becasue it is exactly 1/4th the size of 720x480... ie they cut both dimensions in half

RadicalEd0 · Post by **RadicalEd0** » Thu Mar 13, 2003 4:50 pm

Which means they arent cropping overscan off and are wasting bits on black space around the edges. It's just as easy to crop(8,0,-8,-0).reduceby2() or <insert irregular cropping>.bicubicresize(352,240,0.0,0.5)
:\

the Black Monarch · Post by **the Black Monarch** » Thu Mar 13, 2003 10:28 pm

I find that cutting the resolution in half both ways (or about half) really makes the video quality go to hell without actually changing the file size much. I tried encoding three minutes of Babylon 5 at 24 FPS, 700 kbps, and two different resolutions, both with a Gaussian Blur; the 720x400 file was 22.1 MB, and the 432x240 file was 21.4 MB. That's about a three percent reduction in size, but when both were full-screened, the larger file looked a hell of a lot better.

In other words, bigger resolution = better.

Tsukin · Post by **Tsukin** » Sat Mar 29, 2003 11:21 pm

Um, I used the resolution 360x240 in TMPGEnc and it worked just fine.

Tsukin · Post by **Tsukin** » Sat Mar 29, 2003 11:24 pm

By the way, a video res doesn't have to be a multiple of 16 to work in tmpgenc, i checked and it says it needs to be a multiple of "8", and 360 divided by 8 is 45, so it works