Is PS2's aspect ration 4:3 or 64:49?

[pcsx2zz]

I have a PS2 hooked up to TV via component cable, and I noticed the image on TV screen is slightly narrower than the output from PCSX2 which is set to 4:3.
Then I tweaked PCSX2's apect ratio to 64:49 with ReShade, and it seems to match the AR on TV screen.

So I was wondering if PS2's apsect ratio is 4:3, or 64:49 just like SNES?

[envisaged0ne]

It's 4:3

[refraction]

fwiw, since you signed up just to "Ackchually" somebody from 2 months ago, the PS2 only outputs a width of 640, the different formats are actually zoomed to the fixed 640 output (the output is set by the PAL/NTSC analogue selection), the signal frequency is the same out for all formats, just the speed which each line is read is altered.

While it can zoom the vertical too, no game uses this, so it will always be the full height 224/256 progressive or 448/512 interlaced that the signal expects.

also FWIW, 4:3 is equivilant to 64:48, so it's not exactly very different, and then you have to give some variance for how the TV chooses to display it. For ease games are generally designed to run at 4:3

[pcsx2zz]

fwiw, since you signed up just to "Ackchually" somebody from 2 months ago, the PS2 only outputs a width of 640, the different formats are actually zoomed to the fixed 640 output (the output is set by the PAL/NTSC analogue selection), the signal frequency is the same out for all formats, just the speed which each line is read is altered.

While it can zoom the vertical too, no game uses this, so it will always be the full height 224/256 progressive or 448/512 interlaced that the signal expects.

also FWIW, 4:3 is equivilant to 64:48, so it's not exactly very different, and then you have to give some variance for how the TV chooses to display it. For ease games are generally designed to run at 4:3

A dev! Firstly, thank you and the others having built this emulator so I can play those classic titles with convenient features like instant save/load which you can't get from the real console.
Though I registered the forum only months ago, I've been a PCSX2 user for more than 10 years.

After I first posted this post, I did more tests:
   
   
   
The same game, the first pic is from a real PS2 on a modern LCD TV switched to 4:3 mode, the second pic is from GC emulator Dolphin, their ARs looks the same and I think this is the accurate AR. (An "accurate" AR just means it is accurate to the real console and not neccessarily mean it is "correct", as I found most game developers back in the old days don't really care about AR, they just throw the picture onto the TV screen, does the TV show the pic? Yes? then job done!)
The third pic is from PCSX2, it is 4:3, and it looks a bit fatter than the previous two - that's what convincing me more and more the accurate PS2 AR is not 4:3 but 64:49.

What's more, I recently read this: https://forums.nesdev.org/viewtopic.php?t=15879
It basically says the 3rd and 4th gen consoles's AR is really 4:3 if you count the black borders in, but if you cut the horicontal and vertical black bars from the picture, what's left is of 64:49 AR.
I think the 5th and 6th gen consoles' AR is pretty much the same as long as they all respect the NTSC standard. (PAL region is another story.)
In PS1's 320*224 mode, the full frame 350*240 is 4:3, and the Pixel AR is 32:35.
If you cut off the black borders (or someone call it "overscan"), you get the 320*224 image with an AR of 320*32/35/224= 1.3061...=64:49.
In PS2's 640*448 mode, the full frame 704*480 is 4:3, and the Pixel AR is 10:11.
If you cut off the black borders (or someone call it "overscan"), you get the 640*448 image with an AR of 640*10/11/448= 1.2987...=64:49.28, very close to 64:49, and definitely not 4:3.

Appreciate if someone could correct me if I'm wrong on this.

[refraction]

oh I'm not saying you're wrong, there's jsut not a lot in it, plus it also makes a difference if you're talking about NTSC and PAL, since the aspect ratio is different again, due to 640x512, rather than 448.

So yeah, PCSX2 isn't *correct*, but depending on your TV, it'll be close enough the same. If somebody wants to implement the correct aspect ratios, I'm not going to stop them