Reddit reviews Portta HDMI Converter Up-Scaler AV or CVBS and S-Video and R/L Audio to HDMI Converter V1.3 Support 720P 1080P HDMI with 3D Plastic Case for PS3 PS4 Blu-ray DVD Xbox Notebook

This!
http://www.amazon.com/gp/product/B003NS0UUQ?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

Works for my N64 on my insignia.

If you don't mind dropping a few bux, a scanline converter/emulator is the way to go. There is one called the 'Framemeister', but it is a Japan import and seems to run around $500 if you are in the US.

There are cheaper options, a quick search on amazon yielded this guy which seems to have decent reviews, and is about 1/10th of the price.

EDIT: I was assuming that your TV didn't already have a composite input. If it does, and you are satisfied with the quality then it should just work. I am partial to the CRT 'feel' (nostalgia) so if I ever ditch my CRT monitor I would have to get one of these.

I use this one: http://www.amazon.com/gp/product/B003NS0UUQ with my SNES and N64 and it works great.

I use this one: http://www.amazon.com/gp/product/B0064JIC9M with my Wii and it works great too.

No, that's how the N64 has always looked :( You can dump money into building an RGB amp, finding a quality compatible CRT, and hooking it up with the best possible connection and it'll still (generally) look like shit (but with more vibrant colors!).

The upscaling on the PS3 for PS1 games isn't the best, but it's great for the price (free).

Honestly though, just stick with your current set as long as it's decent for modern games. If you want to save some space and time, instead of trying to track down a bulky ass CRT, pick up something like this. If money is not a problem, then get one of these.

You've got a couple of options with older consoles with the Elgato card. You can either get an HDMI converter box like this one: http://www.amazon.com/Composite-S-video-Audio-HDMI-Converter/dp/B003NS0UUQ/ref=sr_1_3?ie=UTF8&qid=1381089076&sr=8-3&keywords=rca+to+hdmi

Or Elgato has an adapter cable you can get:
http://support.elgato.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=4633

I have both, and they both do a pretty good job.

Here ya go, this might help with how it should be setup. (By should, this is how mine is setup and always works.)

Rough Setup

If you are looking for composite/component like old retro consoles, the setup is slightly different. If you don't want to deal with another piece of hardware, you can get a Elgato Game Capture HD or a Roxio GameCap HD Pro. Both have the ability to use older signals.

If you want to keep everything HDMI, you can snag an AV to HDMI 1080p scaler/convertor. This is the one I have. There are LARGE inherent differences between using a box to convert it to HDMI rather than use the cleanest of signals (which isn't that clean to begin with) when it comes to AV cables. Using a box like the Portta is very convenient. But essentially, with the setup you'll go console to Portta to splitter to capture box to PC.

You'll get the best picture with a s-video cable (unless you're willing to do the RGB mod). Cheap ones are about $5-10. If your TV will accept svid directly (unlikely though given that it's new) then do that, else, you should get an upscaler to convert the signal to HD and allow you to plug-in HDMI.

There are adapters out there, but in my opinion it wouldn't be worth it since they cost as much as a new Roku with HDMI ~$50 USD.

For example

Are you talking about something like this? S-Video to HDMI

I am using this but am looking for something better. I plan on going S-Video so possibly this but I would rather not have to press a button to switch between Composite and S-Video. For the Wii I use this and for the PS2 I use this. For the PS2 you have to trim the USB cable to be able to use it vertical. For the Xbox there is no solution so I use this

If you are on a budget, my choice for a converter was Portta RCA to HDMI converter

Its not the best but its sufficient from my experience. Supports both NTSC and PAL, S-video, RCA and it has a button to toggle between upscaled 720p and 1080p. Input lag isnt too bad (I remember it was about on par with most TV's internal converters) and artifacts are not bad and mostly only relevant with PS2 games. Keeping the option at 720p might help out a little bit.

Minuses would be that the power cord is short and the sound conversion is only serviceable. I connect the sound jacks directly to speakers/amplifier.

This box also directly stretches to 16:9, so if that bothers you, you either want to squeeze it back on the TV side, or just ignore it.

If you have a RCA (yellow/red/white) output on the cable box, you can get a converter. I did it with Dish network. Had a sd output but only had a HD tv with zero rca inputs. So had to convert that signal to get it in the tv via HDMI. This is the box I got to do it with. https://www.amazon.com/gp/product/B003NS0UUQ/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

Does your TV have no RCA ports? Incredible.

You can always get something like this.

I got a madcatz s video cable http://www.amazon.com/gp/product/B0000C88IB?keywords=madcatz%20s%20video&qid=1451775523&ref_=sr_1_1&sr=8-1 ...the only one without a yellow cable I can find is this http://www.amazon.com/Gamecube-S-Video-Cable-Bulk-Packaging/dp/B000P6R46W/ref=sr_1_1?ie=UTF8&qid=1451775184&sr=8-1&keywords=s+video+bulk

Also forget to mention, I ordered the converter today just to try it out, its this http://www.amazon.com/Portta-PETCSHP-Composite-1080p%C2%A0-%C2%A0Not%C2%A0-%C2%A0Windows%C2%A010/dp/B003NS0UUQ/ref=sr_1_1?ie=UTF8&qid=1451775247&sr=8-1&keywords=hdmi+converter+porta

Modern tvs are terrible at displaying standard definition content. Laserdisc players were often optimized for tube tvs. Even a cheap upscaler (just like what you get in an upscaling dvd players) might help some with the picture quality.

[This one] (http://www.amazon.ca/Portta-PETCSHP-Composite-Converter-Windows-10/dp/B003NS0UUQ).

I have the N64 hooked up with composite to it right now, I'm waiting in the mail on an S-video cable as the current S-video cable I have now is terrible.

It's a pretty sweet scaler, but you dont have to necessarily buy from the link I sent you. It appears to be a china model and the "porta" is just the name of the reseller. You can buy the exact same box for a little less from other sellers. Just make sure the picture of the box is the same.

It has 4 modes.

-Compostie 720p

-S-Video 720p

-Compostie 1080p (What I'm currently using)

-S-Video 1080p

any experience with Portta converters?

http://www.amazon.com/Portta-PETCSHP-Composite-Converter-Upscaler/dp/B003NS0UUQ/ref=sr_1_2?ie=UTF8&qid=1416095993&sr=8-2&keywords=framemeister

You may want to give this a try:
http://www.amazon.com/Portta-PETCSHP-Composite-Converter-Upscaler/dp/B003NS0UUQ

It will convert your S-Video out to HDMI, and do its own upscaling so you're not relying on the Xbox or TV. I haven't used it, but reviews look pretty good (and better than other models Amazon stocks).

It may not be perfect, but if Comcast is charging $9/month for HD and you're happy with SD, you'll get a 5 month return on investment for the $40 converter box.

So it's Cable -> (coax in) Comcast box (S-Video Out) -> (S-Video In) Converter (HDMI Out) -> (HDMI In) Xbox One (HDMI Out) -> (HDMI in) TV

Hope that helps.

There are $40-$50 upscalers which do a sort of adequate but somewhat laggy and unavoidably glitchy job of upscaling 240p based on the erroneous assumption that it's 480i. But they're literally dumping half of all video data from the get-go, by processing it as a 30Hz per scanline signal. And that starting point is your best case scenario. Still, upscalers like this one are adequate to the purposes of some players.

Even more so, most recent Samsung TV models do a pretty adequate job of erroneously processing 240p in a way that at least gets a 30Hz colour image on screen. But obviously, it doesn't make much sense to buy a $1000 screen in order to process a muddy Composite video signal in an only half-broken way, when you could spend $400 to upscale much better signals, from every console you own, and do it perfectly, on any screen at all.

I just bought one of these for that very reason and it works flawlessly: http://www.amazon.com/Portta-PETCSHP-Composite-Converter-Windows-10/dp/B003NS0UUQ

My only complaint is that the plug cord is too short.