Colecovision screen vert stretch

[Pitou]

Hello,

I just noticed that when there is a screen change in a game the screen stretch vertically for a second then goes back to normal.

It's very noticeable in The Heist game.

I'm using the hdmi output.
Any idea?
Thanks!
Pitou!

[rhester72]

What is your vsync_adjust set to?

[Pitou]

Code: Select all

; Set to 1 for automatic HDMI VSync rate adjust to match original VSync.
; Set to 2 for low latency mode (single buffer).
; This option makes video butter smooth like on original emulated system.
; Adjusting is done by changing pixel clock. Not every display supports variable pixel clock.
; For proper adjusting and to reduce possible out of range pixel clock, use 60Hz HDMI video
; modes as a base even for 50Hz systems. 
vsync_adjust=0

It is set to 0

[rhester72]

Hmm...OK, that blows my theory. :/

[Pitou]

No problem, thanks for helping.
Here are 2 screenshots that show the issue.

[Flandango]

Do you have Border turned off? If so, turn it on and see if that helps you.
The "stretched" images you see should actually be a blank screen, but when the signal is cropped to remove the border, it's causing that weird effect.

[Pitou]

@Flandango, that was it!
Yes, it has to be a blank screen and now it works fine.

Thanks very much!
Pitou!