Resolution

[G6MNJ]

I am a big fan of the Portsdown transmitter however whilst we can change symbol rate, fec etc there seems no provision for the resolution.

I guess the testcard jpg is set at a given resolution so that determines that, but what about the USB video capture device or Pi Cam how is their resolution decided and can it be altered?

Thanks
Paul G6MNJ

[G8GKQ]

Hi Paul

The resolution options are selected from the "Format" button on Menu 1.

The full list includes :

• 4:3 which is usually 720x576
• 16:9 which is usually something like 1024x576
• 720p which is 1280x720
• 1080p which is 1920x1080

However, only the lower resolution modes are available for most sources. Webcams in particular tend to limit availble resolutions, so I have chosen the closest available that gives reasonable results. The RPi cannot handle the throughput of the higher resolutions from most sources.

I could spend weeks documenting all this, but the best thing to do is try it and see what works.

73

Dave

[g8gtz]

I could spend weeks documenting all this, but the best thing to do is try it and see what works.

And then update the wiki so we can all learn!