Ability to place a local file object at a fixed point in a live stream video and have it hold position regardless of camera movement.

[vcandy]

Good day all. Any help on obs's capabilities or plugin that can perform what I am looking for would be greatly appreciated.

Ok here it is. I live stream baseball. Have several cameras one of which is in the outfield looking over pitchers shoulder, showing essentially the front view of the batter and catcher. Created a strike zone in MS paint 3d which is essentially a thin, edged rectangle box that provides the zone of where a strike should be. It is this strike box that I want anchored to a point in the video. So if the camera slightly moves, the strike box would remain in the same fixed position relative to a point in the background of the stream.

In other words, if the camera view were to move right let's say because of wind or what have you, the strike box would counter that and move slightly left to remain at the fixed point.

My setup, I have multiple scenes with multiple cameras. Scene 2 is the outfield cam and contained in the sources are vid capture device which I use ivCam and a local file which is 3d painted strike box.

You may ask why I am getting movement in the camera with it being on very stable tripod. Great question. We live in probably one of the windy parts of the country and no matter how secure I attempt to set the camera or mount it I get slight movements all the time. In fact, I do use a third party stabilizer add on for all my cameras which helps but does not entirely solve what I am looking for.

Attached is a still from one of my streams, and as you can see the strike box where I want to have it remain at this point regardless where the camera moves.

Thanks a ton in reading this and appreciate any feedback. -Mike

 

[Lawrence_SoCal]

good luck...
1. as that doesn't appear technically easy... maybe someone else will know? you mentioned a fixed point, but that is exactly what you don't want. A fixed overlay is easy, you want an overlay that moves as the camera/lens moves and that gets tricky (unless overlay is on/in camera/lens itself... which is sometimes an option)
2. I suspect it will be much easier, more reliable/consistent, etc to get the camera mount stable than to try and come up with an overlay that will move against a variable background (see below).
I suspect (just thinking aloud, so to speak) it would be easier if you were able to create a fixed reference point on the backstop, and virtually anchor your strike overlay relative to that truly fixed position ... but beware CPU impact of system having to CONSTANTLY analyze that incoming video stream (and thermal/performance limits of your OBS Studio system
3. Easier would be to use a camera that you could add the overlay in the camera itself so as camera moves, so does the overlay

I have a heavy duty tripod... and yes, with gusts, still going to get some movement. Which is why there are even heavier tripods (and weighted ballast for tripods). Seriously, there are ways to keep tripod stable in 40+mph winds (and higher) .. and all of these will entail a LOT less effort than doing something in OBS Studio (I'd think... could be wrong). I'm thinking C-Stand and 40+lbs of ballast bags ;^)
- Or, there are tripods that have an anchor point on the bottom of the center column (there are also retrofit straps you could use to same effect), and you can add weight to that, or put a ground anchor in the soil under tripod (tent, umbrella, etc... depending on ground type) and attach a small rope (or anchor strap, etc... a little stretch/flex would probably be helpful for setup... like the 1in thick rubber anchor straps with metal S-hooks on either end? lots of possibilities ) to anchor and tripod...

MY thinking... there are stable video mounts for reporters during a hurricane... bound to be a way to create a stable camera mount for a baseball field. As soon as you try to have an overlay in OBS Studio move based on lens perspective... gets WAY trickier, with free, open-source plugins of various quality... etc. I suspect you can find something to work as you asked ... but will it be worth it?

anyways... just trying to think outside the box

 

[vcandy]

T

good luck...
1. as that doesn't appear technically easy... maybe someone else will know? you mentioned a fixed point, but that is exactly what you don't want. A fixed overlay is easy, you want an overlay that moves as the camera/lens moves and that gets tricky (unless overlay is on/in camera/lens itself... which is sometimes an option)
2. I suspect it will be much easier, more reliable/consistent, etc to get the camera mount stable than to try and come up with an overlay that will move against a variable background (see below).
I suspect (just thinking aloud, so to speak) it would be easier if you were able to create a fixed reference point on the backstop, and virtually anchor your strike overlay relative to that truly fixed position ... but beware CPU impact of system having to CONSTANTLY analyze that incoming video stream (and thermal/performance limits of your OBS Studio system
3. Easier would be to use a camera that you could add the overlay in the camera itself so as camera moves, so does the overlay

I have a heavy duty tripod... and yes, with gusts, still going to get some movement. Which is why there are even heavier tripods (and weighted ballast for tripods). Seriously, there are ways to keep tripod stable in 40+mph winds (and higher) .. and all of these will entail a LOT less effort than doing something in OBS Studio (I'd think... could be wrong). I'm thinking C-Stand and 40+lbs of ballast bags ;^)
- Or, there are tripods that have an anchor point on the bottom of the center column (there are also retrofit straps you could use to same effect), and you can add weight to that, or put a ground anchor in the soil under tripod (tent, umbrella, etc... depending on ground type) and attach a small rope (or anchor strap, etc... a little stretch/flex would probably be helpful for setup... like the 1in thick rubber anchor straps with metal S-hooks on either end? lots of possibilities ) to anchor and tripod...

MY thinking... there are stable video mounts for reporters during a hurricane... bound to be a way to create a stable camera mount for a baseball field. As soon as you try to have an overlay in OBS Studio move based on lens perspective... gets WAY trickier, with free, open-source plugins of various quality... etc. I suspect you can find something to work as you asked ... but will it be worth it?

anyways... just trying to think outside the box

Thanks Lawrence for the reply. I think you response is very sensical. I guess in my stubborn ways was more curious to see if I could get this to work. Been having a lot of fun with obs thus far. Take care... Mike