greghains
Posts: 7
Joined: Mon Aug 11, 2014 2:20 am

Pi RCA output

Mon Aug 11, 2014 6:09 am

Hi,

I apologise if this is in the wrong topic, but couldn't see anywhere more specific to post it.

I am looking to utilise the WVGA (800x480) LCD screen of my Pioneer 960DAB head unit in my car as the monitor for my Pi project. My question is:

Does the display adjust, or do I need to "shape" the resolution of the composite monitor output from the Pi to display it on this screen?

Whilst I'm in I.T. and quite comfortable with resolutions, I'm not fully across composite video and how resolutions are handled by it. I wasn't sure if it expected an NTSC or PAL device at the other end. I imagine that I could control the GUI side of Pi once started, but how does it manage it generally?

Can anybody enlighten me please?

Thanks in advance.

Greg

User avatar
rpdom
Posts: 17173
Joined: Sun May 06, 2012 5:17 am
Location: Chelmsford, Essex, UK

Re: Pi RCA output

Mon Aug 11, 2014 7:48 am

Composite output is pretty much fixed resolution.

You can make minor tweaks in config.txt, like sdtv_mode=0 for NTSC and sdtv_mode=2 for PAL.
NTSC is 720x480 and PAL is 720x576

You can also change the aspect ratio with sdtv_aspect=n, when n=1 is 4:3 (default), n=2 is 14:9 and n=3 is 16:9.

The other thing to experiment with is the overscan settings.

fruitoftheloom
Posts: 23337
Joined: Tue Mar 25, 2014 12:40 pm
Location: Delightful Dorset

Re: Pi RCA output

Mon Aug 11, 2014 7:51 am

rpdom wrote:Composite output is pretty much fixed resolution.

You can make minor tweaks in config.txt, like sdtv_mode=0 for NTSC and sdtv_mode=2 for PAL.
NTSC is 720x480 and PAL is 720x576

You can also change the aspect ratio with sdtv_aspect=n, when n=1 is 4:3 (default), n=2 is 14:9 and n=3 is 16:9.

The other thing to experiment with is the overscan settings.

http://elinux.org/R-Pi_ConfigurationFile
Rather than negativity think outside the box !
RPi 4B 4GB (SSD Boot)..
Asus ChromeBox 3 Celeron is my other computer...

greghains
Posts: 7
Joined: Mon Aug 11, 2014 2:20 am

Re: Pi RCA output

Mon Aug 11, 2014 7:55 am

Hi RPDOM,

Thank you for your reply.
I thought it may be operating a little differently, so you've confirmed that.
I'll work around that and then work in the GUI so I have more control of the resolution.

Cheers, :)

Greg

loganthegun
Posts: 8
Joined: Fri Sep 05, 2014 6:23 pm

Re: Pi RCA output

Mon Sep 15, 2014 4:08 pm

Hello,

Have you solved your problem? I am attempting to hook my B+ to my touch screen double din head unit and i'm loosing my mind. So far i have tried the strait USB to the hub and straight to the pi. I'm running into a pack feed of power from the head unit and i think it is killing it. i have ordered a HDMI to AV and a usb to av to try but im concerned. Thoughts?

-Logan

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