Author Topic: Idea: video/audio capture from edge connector  (Read 31822 times)

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Offline YesAffinity

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Re: Idea: video/audio capture from edge connector
« Reply #15 on: August 19, 2015, 07:15:32 pm »
It's aliiiiiiiiive!!!!  Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm

After getting the jrok encoder replaced by jrok (first one wasn't seeing sync), and integrating a jrok sync cleaner, I am getting video and audio out of the edge connector.  I will do a single line diagram eventually, but for now wanted to post pics of the first tests.

Composite video is a bit "jaggedy".  I don't have the ability to test s-video except on a crappy USB capture device, which wasn't doing well with either the s-video output or the composite output.  The component looks amazing.

Does anybody know a good, inexpensive, USB component capture device?  I need USB because I'm capturing to my laptop and don't have the ability to drag a desktop computer within range of my DK cab.

The pictures in order show:

1) First test run setup, via composite out with nothing secured within the cab
2) First test run monitor display, via composite out with nothing secured within the cab
3) All components secured in the cabinet, composite video displaying
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Offline YesAffinity

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Re: Idea: video/audio capture from edge connector
« Reply #16 on: August 19, 2015, 07:16:15 pm »
4) The secured components, from left to right: jrok encoder on side wall, Mike's Arcade inverter board, jrok sync cleaner.  Yes I know the wire management isn't great.  There's a lot of wires going a lot of directions, and this is probably as good as its going to get for a while.
5) Component video displaying
6) Component video displaying
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Offline Rolledcigs

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Re: Idea: video/audio capture from edge connector
« Reply #17 on: August 19, 2015, 09:02:14 pm »
So much  <confused> but that's sweeeeeeeeeet  Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm.
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Offline f_symbols

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Re: Idea: video/audio capture from edge connector
« Reply #18 on: August 19, 2015, 11:35:22 pm »
Wow, that image quality in picture 6 is epic  <gasp> , great job.  This is probably exactly how  <Billy> did it.  Kappa
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Offline YesAffinity

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Re: Idea: video/audio capture from edge connector
« Reply #19 on: August 30, 2015, 07:12:35 pm »
Well, a quick update here, on the state of this project.  The output from the jrok board is apparently something that current gen capture devices aren't too keen on.  I bought two different devices, one a low-cost composite and s-video usb capture "stick", and the other a more pricey component/composite/s-video "gaming" capture device.  Both of them get an image, but the results are not great and nothing I could ever stream.

I talked to jrok, and he recommended an old sabrent PCI capture card, which he is certain will work with the output from the encoder.  So, I bought one off ebay, and got it last week.  The problem is, it doesn't work on any OS newer than XP.  :(  So, just put together an XP dual boot with my current gen computer, you say?  Well, that was my idea too, but it turned out to be much more difficult than one would think.  My current gen computer won't even boot the xp install disk.  I finally got the computer which I've been using as the family file server (archive storage of important pictures, docs, etc.) to the point that it boots XP, and XP is fully updated.  The only problem: it doesn't have a PCI slot.  So, I had to dig around on ebay until I found a motherboard with the same chipset that has a PCI slot.  This particular chipset was apparently the absolute low budget option at the time, cuz all of the mobos I could find are all micro atx with very few bells or whistles.  But, I found one, ordered it, and next weekend (thankfully a holiday weekend), I will swap the mobo, screw around with windows xp some more to get it to work on the new mobo, and then work on capturing on that computer, and streaming to my Windows 7 computer via VLC, because of course, OBS does not work on Windows XP, so it couldn't just be as simple as that.

Another parallel path I'm running is acquiring an old Happauge WinTV PVR USB2.  This device worked with the capture setup I had going on my street fighter cabinet a few years back.  Granted, that setup used a different encoder, but I figure it's probably worth a shot.  I owned a WinTV PVR, and was actually trying to use it in the early stages of this project, but couldn't get the software that supports Windows 7 to install.  You need the original installation disk that came with the device, and I couldn't find it anywhere.  Sadly enough, I took it to the last local electronics recycling drive, about a month ago.  As I was digging through drawers trying to find parts to make XP work on the family file server, guess what I found?  You guessed it: the original Happauge installation disk.  So, again back to ebay, and there are two WinTV PVR USB2's for auction.  Dirt cheap, too.  But, as you would probably guess, they don't come with cables or the original power supply.  And yes, you guessed right again, when I scrapped the previous WinTV PVR that I owned, the power supply went with it.  So, I e-mailed Happauge, and lo and behold, they actually still sell replacement power supplies.  So, one of those is on order, too.

This project is probably going to be the death of me.  If neither of these paths produce a workable stream direct from my cab, then my only other option is to wait for jrok to test current gen capture devices, and make a recommendation...which he said he would do, but who knows how long that will take.   :'(

Hopefully, I will be updating this with some good news next week.
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Offline YesAffinity

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Re: Idea: video/audio capture from edge connector
« Reply #20 on: September 03, 2015, 06:45:48 pm »
Boom!  S-video working:

http://www.twitch.tv/yesaffinity/v/14322891

 8) 8) 8) 8) 8) 8) 8) 8) 8) 8) 8)

No more webcam hanging over my head while I play.  :P
« Last Edit: September 03, 2015, 07:28:53 pm by YesAffinity »
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Offline f_symbols

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Re: Idea: video/audio capture from edge connector
« Reply #21 on: September 03, 2015, 08:31:24 pm »
Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm <Tim> Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm Kreygasm
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Offline ChrisP

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Re: Idea: video/audio capture from edge connector
« Reply #22 on: September 03, 2015, 08:42:48 pm »
Oh my god, it's beautiful!  BibleThump

It could use a little more brightness, but I love it. The direct audio feed also goes to show that the analog sounds in MAME are still far from perfect.

Kinda makes you wonder why <Billy>'s direct feed world records had no audio. Because geez, if those were, in reality, just stitched-together MAME runs (heaven forbid!), the audio would have been a dead giveaway...
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Offline YesAffinity

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Re: Idea: video/audio capture from edge connector
« Reply #23 on: September 04, 2015, 03:08:59 am »
Thanks, guys!  Couldn't have done it without the support and encouragement of the forums, and of course shouts go out to jrok and Mike's arcade for the great service and support they offered.

Yeah, the video and audio needs to be tweaked a bit.  Audio is sampling at 384k, which I'm speculating is why the direct-feed audio (via USB capture) is "hiccup'ing" every so often.

Now, if I could find a component capture device that will accept the encoder's video output, we'll really be cooking.  But, just getting to this point was a long enough road.  I'm going to enjoy the destination for a bit, before endeavoring on a new path.  ;D
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Offline tilt

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Re: Idea: video/audio capture from edge connector
« Reply #24 on: September 04, 2015, 04:57:04 am »
Holy fuck, I love it  Kreygasm Kreygasm .  I honestly want this setup sooooo bad, fkin awesome.  Some of these have already been said, but here are my suggestions:
- enable deinterlacing in xsplit, or feed the video through amarec which has a fantastic deinterlacing algorithm for old game.
- Use the built in xsplit adjustments to get the colors closer to mame, or your monitor, depending how you want it to look.

I really love this idea, and I cant wait to see some schematics so I can make it happen too  <stirpot>
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Offline YesAffinity

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Re: Idea: video/audio capture from edge connector
« Reply #25 on: September 04, 2015, 01:04:24 pm »
Thanks for the suggestions, tilt.  I am using OBS.  I think I need to tweak blue, cuz the L=xx especially is pretty blurry, and white things have a blue tint to them.  I think blue is too high on either the MA inverter board, the jrok encoder or both.  I can adjust brightness, sharpness and other typical "monitor" settings within the Happauge WinTV PVR USB2 that I'm using to capture, and initially tinkering around with brightness within these settings made a good improvement.  There's definitely a few things that need to be tweaked.  I also reduced the audio sample rate to 44.1kHz/192kbits/s and the sound hiccups are now gone.  I think I need to reduce the capture resolution within the WinTV PVR, too, cuz the video is slightly glitchy (deinterlacing aside).  Reducing the resolution within the WinTV PVR will reduce the bandwidth required of the USB connection, and I think will eliminate the slight video glitchiness.  I'll let VLC do all the upscaling, since my PC's got plenty of horsepower for that.  I will try OBS's deinterlacing once I get these other things ironed out.

Schematics are coming soon, I hope to get a good baseline "how to" put together and posted this weekend.
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Offline YesAffinity

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Re: Idea: video/audio capture from edge connector
« Reply #26 on: November 03, 2015, 08:12:12 pm »
Realizing this thread was left kinda open-ended, for anyone who has read this far and is interested in learning more, go here:

DK Direct Feed How-To - https://donkeykongforum.net/index.php?topic=1413.0
Matthew 21:22

DK Arcade PB (verified): 970,200 KS
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^Now outdated, see instead: http://donkeykongforum.net/index.php?topic=2471.0
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