Here's a weird one you bright vMix Users can put your thoughts to... please!

Running a really simple show on a Alienware m17 R3 pulling an NDI source from an, admittedly older, but still powerful enough, ASUS laptop playing a PowerPoint slideshow. Have used this laptop before countless times doing the same thing on a different network (here, I'm sure lies my problem) but I would like help to diagnose exactly what so I can design it out in the future.

SYMPTOM: NDI source only shows two thirds of the image, black pillar on the right hand side for the other third. Kind of like the image has shifted left by a third.

WHAT I DID: checked resolution on PowerPoint laptop was 1080. Check; Tried 'moving the image' to the right - it just brought in a blank third on the LHS.

I've used this laptop successfully doing same on the network in our studio. This was a mobile set-up in a social club:

I plugged our Cat5 directly into the Club's modem/router (BT Home Hub in the UK). We then put a Netgear GS305 5-port Gigabit switch on the end of this to service our 3 laptop set-up: 1. LiveStream (Alienware); 2. PowerPoint (Asus); 3. Ancillary/Redundancy (another Asus).

My guess is that it's something to do with the router and I had limited time to look at its settings.

But kind of weird that I get two thirds of a picture. I would be thinking that, if a network issue, I would get nothing at all / blank screen?

If anyone can shed some light on this mystery I would be very grateful.

And what does everyone else do on mobile gigs where you're going to plumb into the venue's router at some stage? I am by no means a network expert but I feel I'm going to have to become one if this kind of curved-ball comes my way every gig!

Thank you in anticipation.

Steve

Thanks for your suggestion Ask. Unfortunately not a solution. We were running PP in Presenter View and the 16:9 slides were displaying on our stage screen just fine. But the NDI feed via vMix Desktop Capture was having none of it.

Still a mystery...

I'm having the same issue but have found that it's only what is displayed on my third monitor, which I use for my full-screen mode. Whatever input I route to the monitor is 100% normal and full-sized. Same symptoms - it looks like the image shifts to the left leaving about 40% of the screen black on the right. I'm flummuxed..

There is a PPT to NDI tool available. It can also take out the PPT background giving you just the data/text (if this is needed). You load the ppt and the tool outputs a NDI stream of it. The downside is that you have to click in the same pace as the presenter and need a view onto the big display.

You also could present online in powerpoint. This will generate a link that you could ingest as a webpage. A little bit cropping and scaling and you are done. Third option is to loop in a NDI encoder at the presentation side.