[QXC]

What SCART cable did you have

“Male RGB Euro SCART to 4 BNC + Audio” from wookiewin on ebay. They seem to be one of the go-tos for cables of the sort, and in my experience the quality is very good as well as the service (in case it was not clear in the above post of mine).

Specifically, by default they sell a SCART>BNC version, but in my case I needed a BNC>SCART. Since I think these cables are more or less made to order, you can specify this when buying (probably just tell them the use case) and just get the correct cable in the first place. This makes sense, as the listing is sold as a cable for hooking a SCART output console up to a BNC monitor, when in my case I’m going from the passthrough output of my BNC monitor into the SCART input of the OSSC.

what exactly did you or your roommate resolder to fix it

Move the black sync wire from pin 19 to pin 20. Move
the L and R audio wires from pins 1 & 3 to 2 & 6 respectively.

Quoting the message I got from the seller, basically there’s sync in/out and audio in/out pins, and which side they’re on determines which direction the cable functions correctly in. Or, did in my case.

and what was the alternative cable offered by the seller?

The exact same cable but with the above changes made. Or, how I should have ordered it in the first place (see first answer).

And did you ever get better results over AV3?

It’s been a while since I’ve used it but I don’t ever remember getting better results over AV3, my suspicions are because it is in fact the cable I have. I won’t really know until I have a VGA source to use some day.

What BNC to VGA cable do you use?

I can’t remember if it was from amazon or ebay, it’s a generic looking thing and it’s quite short.

As a follow up to the above post of mine: everything has been working fine once the cable was corrected and things have been working well enough that I haven’t had to think about it, basically.

[QXC]

Update, I’ve resolved most of the issues today. tl;dr user error 🙂

– Issues on AV1
I was not aware that scart has input and output on some lines (Or, I was but it didn’t register that this could lead to them being wired backwards), and my cable was wired for “SCART>BNC” Rather than “BNC>SCART”. This resolved the issues using RBGS as well as the lack of audio. I should have caught this while pin testing the cable. The seller did mention this in their listing, and offered to fix it for the cost of shipping, but I’m impatient so I had my much more soldering competent roomate switch them around real quick.

– Jailbars
So far not present with AV1 with my limited testing, so I’m now fairly confident that it’s an issue specific to the VGA>BNC cable I was using. I had also found some interference that manifested in moving horizontal lines on the screen, also gone now that I’m using the higher quality SCART cable. I want to mess around with the LPF just to make sure but I’m 99% sure this was entirely a cable issue.

– Aspect ratios
Still need to investigate this, but I’ve gotten my capture card to accept the correct aspect ratio so that’s not a huge deal. Very likely this is a setting I haven’t messed with yet.

– Interlacing/deinterlacing
The behavior I was seeing is isolated to the capture card not being able to process the interlaced signal particularly well. Using an HDMI splitter I see the same signal on my monitor with a steady flicker as expected, whereas the capture card creates a kinda inconsistent wiggle. I’m using a bargin basement capture card so this isn’t a surprise, just wanted to confirm what was going on.

– Picture dropping on input signal change/signal not being sent on startup
I need to test this more but I managed to get the capture card to drop picture once or twice today while the monitor was still showing output. Both devices hooked up to the OSSC via HDMI splitter. So this seems to be some issue related to the capture card specifically.

– Sync dropping on OSSC on input signal change
This hasn’t been well tested yet but I’m fairly confident that it’s an issue cased by interference on the VGA>BNC adapter. It happened on a somewhat regular basis with that cable, albeit inconsistently, so an evening of PS1 games should determine if that’s still happening or not.

Needed to hit up support to realize I had the wrong scart cable, so I can’t take credit for figuring that one out. But now everything is working more or less as expected. I’ll post another update once I’ve figured out the rest of the problems. Never know when your forum posts will turn up in a search result 7 years later.

[QXC]

Not sure how to describe the “deinterlacing”, pretty sure deinterlace was off in OBS but something was having trouble with static lines (i.e. menus). It wasn’t a steady flicker, it’d just wiggle a bit every now and then. Possibly related to noise on my BNC>VGA cable. Still haven’t been able to poke at the settings for that yet.

I’ve also had issues with the OSSC not sending out a signal when I first start it? Usually happens when the console is turned on before the OSSC. I’ll get the test pattern on OSSC startup and it will say it’s synced to a signal, but I get a black screen (capture card)/no output (monitor, goes into standby). This is usually solved with unplugging/replugging the A/V cable or restarting the console and then changing the scaling options around. Going to pick up a HDMI splitter so I can monitor the OSSC output easily and completely remove the capture card from the equation.

In addition to that, sometimes the OSSC will drop sync during 240p/480i resolution changes. Typically the screen will rapidly switch between saying 260p and 525i, and this is resolved by changing the scaling settings. Sometimes the scaling options (typically 1x and 3x?) will do this when you set to them. Sometimes not.

Again I still need to sit down and figure out the exact behavior, but generally speaking this seems to be a bit more finicky than I was expecting. I do wonder how many of these issues are cable related, and not being able to use my SCART cable isn’t helping. Sounds like I might just have to contact support about that.

[QXC]

That I do not know, but for what it’s worth bypassing the CRT (PS cable BNC>BNC Scart) made no difference. It’s a late model PVM with an add in card, didn’t have any issues using the output with my USB3HDCAP (Again, when it worked) or feeding that output into other CRTs. Based on that, I THINK it’s 75 ohm.

Other oddities I’ve encountered unrelated to AV1:

– Everything I’ve thrown at it from the PS1 or PS2 shows up as 525i/263p, despite both consoles being NTSC. I’ve tried multiple units of both consoles. The output from the OSSC appears to be 60hz, so this on it’s own isn’t an issue. PAL games also show up as 525i/263p, for what it’s worth.

– The aspect ratio seems to change depending on the input resolution and rescale, particularly with interlaced inputs. Most of the time the image is about half way between 4:3 and 16:9. Behavior is the same between my cheapo HDMI capture card and an actual HDMI input into a computer monitor. Some of these settings also whack up the framerate on the capture card but I don’t recall seeing the issues on the monitor (albeit more focused on aspect ratio). The no line doubling option seems to be correct most of the time. I’ll have to go back and write down exactly which scale on which input had what output ratio, but 0 scaling worked correctly all of the time IIRC. EDIT: Looks like this can be helped with tweaking.

– Interlaced content doesn’t deinterlace amazingly, primarily menus having the occasional flicker/shimmer, but I’m fairly sure this is a setting issue that I just haven’t taken the time to look into. All of the timings stuff I keep hearing about.

[Author]

Posts