Posted: 2/26/2017 7:02 PM
Post subject: Aspect ratio of arcade games
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feos
Site Admin, Skilled player (1236)
Joined: 4/17/2010
Posts: 11264
Location: RU
NES TAS of 2011
Arcade machines used to use regular CRT screens, which were 4:3 back in the days. I've heard that vertical arcades used 3:4 screens, which were basically the regular screens flipped. And there seems to be widescreen arcades too. We've been encoding arcades without aspect ratio correction for years, and it seems wrong, and I'd like to fix that finally. Does anyone has any insight on that? Links/resources/photos/personal experience/visions/prophecies/stolen top secret papers?
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.
Posted: 2/27/2017 4:06 AM
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£e_Nécroyeur
Skilled player (1650)
Joined: 7/1/2013
Posts: 433
Arcade TASer of 2017 Arcade TAS of 2016 Exotic platforms TASer of 2014 Exotic platforms TAS of 2014
http://triplepointwx.org/George/Native%20Resolutions%20List.csv Is this of any use?
Posted: 2/27/2017 3:23 PM
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feos
Site Admin, Skilled player (1236)
Joined: 4/17/2010
Posts: 11264
Location: RU
NES TAS of 2011
It lists native res and other stuff, but not target res of their screens. EDIT: https://github.com/mamedev/mame/blob/master/src/emu/rendlay.h EDIT: I examined FBA-rr code, and whenever it does aspect ratio correction via user option, it uses 4:3 or 3:4, depending on the game orientation. So this is now known to match the regular CRT aspect ratio. MAME, among its systems, emulates arcades such as pinball machines and LCD based ones that can have arbitrary aspect ratio and it won't change it. But for all the rest, there's a bunch of possible layouts that determine the resulting aspect ratio. Again, 4:3/3:4 dominates here, even for multi-screen ones, but when I have time I'll make a list of games that need no aspect ratio correction, for future reference. Bottomline: Whenever in doubt, apply regular CRT aspect ratio. If it's a multi-screen system, each screen usually is also a regular CRT. To be continued... http://tasvideos.org/forum/viewtopic.php?p=451786#451786
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.