Just to add to the last two posts
THIS link points to an evaluation copy VidblasterX ver 4.1.1
Click on the big blue Download Now but close any pop-ups that relate to any other software. I know it's an old version of Vidblaster, but it's the only one I've been able to set up for a proper aspect ratio with the modeline system we've been using.
To explain, it's a vision switcher that crucially has the ability to send the output to the 2nd monitor port, ie to our modulator.
At a minimum, you need the following modules:
A "Still Store" for your testcards and other graphics.
A "Player" for your videos (I call it telecine)
The "Switcher" module
Two "Monitors"
and lastly an "Output" module
Drag the modules to where you want them on the screen, as you add them.
Right-click on each module to get to its configuration menu:
PLAYER and STILL STORE
"Open" navigate to the wanted video/image file
"Aspect Ratio" 1.78
MONITOR 1
"Display size 25%"
"Source" Preview
MONITOR 2
"Display size 25%"
"Source" Program
OUTPUT
"Source" Program
"Destination" Display 1 (Which is the second monitor on my system).
Click "Video" on the top menu and select
Resolution 1920*1080 (full HD). Then "Video" Frame rate 25.
As you would expect the 1.78:1 (16:9) gives laterally stretched results within Vidblaster but the result at 405 is perfect.
In use, fire up Winmodelines first, selecting Video 1
Make sure the destination of the "Output" module is still Display 1, and turn it "ON".
Now you should be able to select your sources on the program bus of the switcher (mixer).
I've never written up this before, hope there are not too many mistakes, hope you all give it a try, it's a lot better than "sliding" the pictures onto the 405 line screen.