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Yo! Joe! Beat the Ghosts gets displayed in widescreen aspect ratio, no matter what

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First post, by Good_Punk

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Hi,

I have this very strange case where this single game (an Amiga port) gets displayed in some kind of widescreen aspect ratio by DosBox, even though I have aspect=true and everything else setup correctly.
I'm currently recording tons (over 100) game intros and this is the only game that just doesn't want to show up in 4:3.

I'm not sure if it's stretched, or if for whatever reason the game is supposed to be widescreen, but from my knowledge there weren't any widescreen displays so it wouldn't look like that on real hardware, right?

Any ideas why that's the case and if it can/should be fixed?

Cheers

Reply 1 of 3, by ripsaw8080

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The DOS port of the game shows its Amiga origin by tweaking the VGA overscan area to achieve a ~50 Hz refresh rate, which causes an issue with DOSBox's aspect ratio calculation -- the display can and should have a 4:3 aspect ratio in this case. Until the issue is resolved, you could record with aspect=false for the sharpest (not interpolated) source pixels and then post-process the video with VirtualDub or the like to change aspect.

BTW, the game uses video blanking to cover up some mess on the screen, and the machine=vgaonly setting supports the blanking so you won't see the glitchy graphics but IIRC the recorded video will be double-scanned with that setting.

Last edited by ripsaw8080 on 2025-07-16, 14:54. Edited 1 time in total.

Reply 2 of 3, by Good_Punk

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That's very interesting, thanks... and inconvenient. 😅

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