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240p Over HDMI to component (Almost There)

Posted: Mon Jun 20, 2016 6:19 pm
by tekn0
Hello, I have been trying to get 240p "hdmi_mode=8" over hdmi and I am very close now. As seen here: https://youtu.be/VLBHWZV1dZ4

I am using this converter and it is working for the most part and is nice and crisp:https://www.radioshack.com/products/rad ... 5717010885

The TV is producing 240p and natural scanlines. I had to do a few tweaks to the retroarch configs, but I cant seem to get rid of the vertical scrolling or sync issue as seen in the video. I am using a Pi3 and retropie/lakka/retroarch. The vertical scrolling/sync issues happen at boot time on all distros and menus. I have tested on 2 different TV's. Same issue.

Any ideas?
The only tweaks to the boot/config.txt was:
hdmi_group=1
hdmi_mode=8

I as thinking maybe someone what a bit more knowledge might have an hdmi_timing or hdmi_cvt solution that might work. As this could be a very cost effective solution to get 240p from the pi3 HDMI port into standard component.

Re: 240p Over HDMI to component (Almost There)

Posted: Tue Jun 21, 2016 7:14 am
by Chips
I would love to see a pixel perfect 240p mode on Raspberry pi... the TV out of raspberry pi sucks in term of quality moreover there is no way to make is progressive (interlace is always on)...
But what is you screen anyway ? it's not a plain TV but a VGA/PC monitor ?

Re: 240p Over HDMI to component (Almost There)

Posted: Tue Jun 21, 2016 4:00 pm
by tekn0
Chips wrote:I would love to see a pixel perfect 240p mode on Raspberry pi... the TV out of raspberry pi sucks in term of quality moreover there is no way to make is progressive (interlace is always on)...
But what is you screen anyway ? it's not a plain TV but a VGA/PC monitor ?
hdmi_mode=8 is a pixel perfect 240p signal. People have it working over hdmi to vga. I seem to be the lone wolf going for component. The hdmi to component looks sharp and crisp. My screen is a plan old TV. Standard NTSC with component input.

Here is an awesome cab running native 240p over hdmi. https://www.youtube.com/watch?v=uKYFKjiO6bc

Re: 240p Over HDMI to component (Almost There)

Posted: Fri Nov 18, 2016 3:31 pm
by starquake
I created an issue on the github repo for the Raspberry PI firmware: https://github.com/raspberrypi/firmware/issues/683