Border Issues, Black Bars, and Screen Stretch

Floob

@BingoLittle Out of interest is that composite out, so do you have the following in your config.txt?

sdtv_mode=2
sdtv_aspect=1

http://elinux.org/RPiconfig#Video

Maybe post yours to pastebin.com

GreenHawk84

@BingoLittle , off topic one second, which do you use to play Mortal Kombat II? Hows your performance?

BingoLittle

@GreenHawk84 I use lr-imame4all and performance is absolutely perfect. This is despite many forums warning that games like Mortal Kombat II and NBA Jam are very slow...

BingoLittle

@dankcushions Hi again. Really sorry for the delay, I've been at work and can't access the files from there :)

The /opt/retropie/configs/arcade/retroarch.cfg is also stock by the looks of it:

# Settings made here will only override settings in the global retroarch.cfg if placed above the #include line

input_remapping_directory = "/opt/retropie/configs/arcade/"

#include "/opt/retropie/configs/all/retroarch.cfg"

I only ever remember editing one file and that is the /opt/retropie/configs/all/retroarch.cfg file to be honest.

Thanks for the help once again!

BingoLittle

@Floob Hi, yes I am using composite out (one of the reasons the Pi appealed to me so much was native composite out, so that I could avoid using one of those VGA to composite converters, which in my experience are not very good).

I can confirm that my /boot/config.txt file contains sdtv_mode=2. The sdtv_aspect option is not explicitly set, but defaults to 1 if I am right.

dankcushions

@BingoLittle said in Border Issues, Black Bars, and Screen Stretch:

@dankcushions Hi again. Really sorry for the delay, I've been at work and can't access the files from there :)

The /opt/retropie/configs/arcade/retroarch.cfg is also stock by the looks of it:
# Settings made here will only override settings in the global retroarch.cfg if placed above the #include line

input_remapping_directory = "/opt/retropie/configs/arcade/"

#include "/opt/retropie/configs/all/retroarch.cfg"
I only ever remember editing one file and that is the /opt/retropie/configs/all/retroarch.cfg file to be honest.

Thanks for the help once again!

i think floob might be on to something with the config txt settings, but i have a bit of a brute-force solution that you could try? i think perhaps imame4all isn't playing nice with the default aspect ratio settings (mame2003 has a few issues around this also).

use https://github.com/retropie/retropie-setup/wiki/Configuration-Editor

basic libretro options
additional options for arcade
change the aspect ratio setting. make a note of what it is originally. one should be for 4:3 which may be what you want, but i have a feeling it will warp games that are shown with a narrower aspect (eg, pacman, which is 3:4 or something like that?). if that happens, you might want to try these settings: 19 = Config, 20 = 1:1 PAR, 21 = Core Provided.

it's really cool you're running it on a CRT!

GreenHawk84

@BingoLittle, you play MK2 on mame4all without any sound issues, any issues?

BingoLittle

@dankcushions

Yes, I bought a CRT especially for the RetroPie, arcade games just look great on an old TV :-)

Ok I didn't change anything yet in my configuration files, I just wanted to show you that yes indeed lr-imame4all is stretching upright games:

Mr Do!: https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;05AB175E-B8CA-42BF-ADC6-38465B5A7C36
Pac-Man: https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;975AFFC6-56C3-4E69-B3DA-67EC6736D313

However, lr-fba-next is displaying them perfectly:

Mr Do!: https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;3C591A25-9CDE-46F7-B090-7BF8DEFA9A51
Pac-Man: https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;FD72A05F-1493-4D55-85F8-C8A25C1455FD

Of course Final Burn Alpha doesn't emulate some games I want to play, so I have one ROM set that I play out of the /home/pi/RetroPie/roms/arcade/folder using lr-imame4all and another set of ROMS that I play out of /home/pi/RetroPie/roms/fba/ depending on the game.

I will try your suggested settings shortly and let you know the outcome.

Thanks again!

BingoLittle

@GreenHawk84 Actually yes, now that you mention it there are occasional crackling sounds that can be heard, but it's pretty rare and goes away after a few seconds. The sound artefacts aren't particularly annoying, but they are there so sound is not 100% perfect, no...

GreenHawk84

@BingoLittle , okay, I was about to say, I have tried all the cores for Retropie and none of them do MK2 very well for me on a Pi3. Mame2003 seems the closest but suffers from a huge audio glitch periodically. Not trying to derail your topic but I couldn't help but ask. Thanks!

BingoLittle

@GreenHawk84 Yeah sure thing, sorry I kinda misled you there, I had forgotten about the sound issues to be honest. In my experience most emulators are terribly slow, except lr-imame4all which is fast and doesn't drop frames, but has these huge borders and, yes, suffers from these audio glitches (but I must say they are rare enough). At first I thought they might be distortion so maybe it's got to do with the audio level in the Mortal Kombat's BIOS settings being too high? I have yet to try to see if that is the problem.

GreenHawk84

@BingoLittle, feel free to post anything you find out regarding audio and Mortal Kombat in my thread here: https://retropie.org.uk/forum/topic/2612/mortal-kombat-2-3-umk3-audio/19

If you would like, just to keep this thread on topic.

GreenHawk84

@BingoLittle, do you know how to get into the Retroarch GUI? It is START and X together. Go into Video settings and set your aspect ratio from default "Core" to "4:3." Let me know what happens.

BingoLittle

@dankcushions

Ok so I went and experimented with the settings using the Configuration Editor. Sure enough, setting it to 4:3 (it was actually set to Unset before I changed it) - this worked great for MKII and other games, virtually eliminating the borders. However, as you predicted upright games are stretched.

But this is better than before, and presumably I can go into the RetroArch settings when playing using the HotKey+X command and edit settings for individual games? And somehow save settings for individual games?

Thanks again, your help is certainly appreciated!

Floob

@BingoLittle What happens if you enable integer scaling?
http://emulation-general.wikia.com/wiki/Scaling

video_scale_integer = true

If you wanted to set a custom retroarch.cfg for each game you can do that which is how I set specific resolutions for this sort of thing

Given arcade games (as opposed to consoles) have a wide range of native resolutions its not that uncommon to tweak them.
You can create these in the same dir as the game with a name of gamename.zip.cfg

dankcushions

@BingoLittle said in Border Issues, Black Bars, and Screen Stretch:

@dankcushions

Ok so I went and experimented with the settings using the Configuration Editor. Sure enough, setting it to 4:3 (it was actually set to Unset before I changed it) - this worked great for MKII and other games, virtually eliminating the borders. However, as you predicted upright games are stretched.

But this is better than before, and presumably I can go into the RetroArch settings when playing using the HotKey+X command and edit settings for individual games? And somehow save settings for individual games?

Thanks again, your help is certainly appreciated!

great! yeah lr-imame4all is pretty limited. mame4all-pi will work with the same romset and probably not have these display issues, if you don't mind it not being retroarch (may have to manually configure controls).

mame2003 does this stuff better but has the aforementioned problems with MK2/3.

you can do per game .cfg settings by creating a mk2.zip.cfg in your /arcade/ folder, with just the aspect_ratio_index = "14" (or whatever it is) in there.

BingoLittle

@Floob @dankcushions @GreenHawk84

Hi folks,

Ok so if I go and set video_scale_integer=true I get something like the following (e.g. Final Fight running on lr-imame4all):

https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;EE92B6C5-5765-49F9-9672-A9A999565446

However, I noticed that by setting the aspect ratio to 5:4, I get a full screen for basically almost any game:

https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;1C299916-5E91-45BD-B85F-1150C3579A3B

It doesn't seem to be sensitive to the resolution of the arcade game itself, unless the game is an upright, in that case I set the aspect ratio to 3:4 and they look perfect like that. So this setting works for MKII as well as it works for Final Fight or SFII.

Even Mega Drive and SNES games stretch to fill the screen if I set the aspect ratio to 5:4.

So I guess if you want to remove borders and you are using a CRT, then setting this one option seems to work most of time. Basically everything other option is set to default.

Again, many thanks for all the help on this topic!

PS @Floob your videos are excellent, I've watched quite a few of them at this point and they've helped a lot.

Floob

@BingoLittle I think a lot of this will depend on how much you want the precise aspect ratio to be maintained, or if your priority is to fill the borders.
Does "Core Provided" (21) with integer scaling look any good?
The true ratio for final fight looks like 12:7 based on https://en.wikipedia.org/wiki/Final_Fight
I'd be tempted to manually max that to fill the screen keeping the aspect ratio.

I guess this will only really be an issue with arcade games given their varied res as opposed to consoles.
For consoles you could just set a custom retroarch.cfg and be precise with the layout as 99% of the games will be the same.

BingoLittle

@Floob Basically my priority is to fill the screen at the expense of not having true aspect ratios for some games.

I have uploaded two more screen shots. The first is using Core Provided and Integer Scale set to On:

https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;18A3E7B5-1983-4286-86FB-A462900F0945

It just makes the image smaller as you can see and centres it on the screen.

The second screenshot is still set to Core Provided but the Integer Scale is set to Off.

https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;F283CD92-44C9-46E4-B3E9-3E200B01D27D

As you can see, it's almost a full screen. There are small borders to the top and bottom.

dankcushions

@BingoLittle said in Border Issues, Black Bars, and Screen Stretch:

@Floob Basically my priority is to fill the screen at the expense of not having true aspect ratios for some games.

I have uploaded two more screen shots. The first is using Core Provided and Integer Scale set to On:

https://www.icloud.com/sharedalbum/#B0N5n8hH4KO0Fe;18A3E7B5-1983-4286-86FB-A462900F0945

It just makes the image smaller as you can see and centres it on the screen.

that sort of makes sense. final fight (which i think is playing here?) is a 224 lines high game. with integer scaling, the largest it can make it is 3 (2243 is 672, which is what it says on that image). i guess your tv is running at something like 1028768 resolution? that's a pretty strange resolution to be running at - i would have thought a pal tv should run at something576, or (even better for emulation), in NTSC mode at something*480.

you might want to have a look into the different Tv modes available in https://github.com/retropie/retropie-setup/wiki/runcommand - if you're bothered about it being "authentic", but if it fills the screen you might not be too bothered :) i guess with a pal CRT the scanlines aren't going to line up with NTSC arcade games anyway, without big ol borders.