Fitting the picture to a TV screen.

Jan 18, 2015 7 Replies

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David 11 years ago

I'm just trying out my new B+ with an old HD Ready TV (720p I think) and having problems fitting the picture to the available space.

If I turn overscan off then the picture edges disappear - and the task bar is just below the screen.

If I turn overscan on then I can get the width O.K. with very small values of overscan_left and overscan_right but I have a large gap top and bottom.

Is there any easy way to stretch the picture vertically?

[overscan_top and overscan_bottom are currently unset.]

Cheers

Dave R

Windows 8.1 on PCSpecialist box

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alister 11 years ago

with my 1080p Samsung a perfect picture was obtained by setting overscan off on the pi & the TV to picture size to fit.

These PRESERVES should be FORCE-FED to PENTAGON OFFICIALS!!

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Bill Garber 11 years ago

I would have to set mine up to find out how I did this, but, have you tried setting them yet? Try +5 to start, then go larger, and if they go the wrong way, try a minus figure.

Bill Garber - I love my C1 D0 D0 CC C5 A0 C9 C9 C7 D3

formatting link

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Unknown 11 years ago

AFAICR it's adjusted in one [of the few] text-files in /boot. The "# " makes it clear.

grep /boot/* might take you there.

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David 11 years ago

It is adjusted in /boot/config.txt - which is where I've been working with the 'overscan' settings.

Cheers

Dave R

Windows 8.1 on PCSpecialist box

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David 11 years ago

Well done that person!

For some reason I had never considered that you could use a negative figure for overscan.

Much editing and rebooting later I seem to have a fit to the screen.

Wouldn't it be nice if you could re-read config.txt and apply the changes without rebooting!

Cheers

Dave R

Windows 8.1 on PCSpecialist box

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Dom 11 years ago

The tvservice command can switch video output and modes. The fbset command will change the framebuffer to match, and the code here:

formatting link

can check and change the overscan settings on the fly.

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David 11 years ago

Thanks - will give that a look.

Windows 8.1 on PCSpecialist box

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