Game on green screen in background

Discussion in 'Live Streaming & Content Creation' started by riccoo, Apr 12, 2019.

  1. riccoo

    riccoo Member

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  2. Hater

    Hater Member

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    it's called OBS

    software that is free

    software that keys (is that the right terminology?) another source over the green
     
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    riccoo

    riccoo Member

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    no i get that, i do that now have game in background and then me in front keyed out, this is like the have a wall that green behind them game on that and then them in front at a distance but they dont get keyed out? have a look at the pic
     
  4. Hater

    Hater Member

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    I don't understand what you mean

    The picture is a guy in front of the green screen, he is using OBS to key over the green screen? it's just the screen is further back than yours is?
     
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    riccoo

    riccoo Member

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    yer but if u key out you would see alot more dissappear on the scene, look at him he is not being keyed out nor his desk, remember when you key not just green is removed, dark colours fade out and so on
     
  6. Hater

    Hater Member

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    why would dark colours fade out when you're keying over them? wouldn't keying out not-green colours defeat the purpose of a green screen? thats why when you have green in the scene, you use a blue screen... or is it an OBS specific quirk?

    do you mean like how to distort the source to fit the frame of the cut out green-ness?
     
    Last edited: Apr 12, 2019
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  7. SSJ4

    SSJ4 Member

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    upload_2019-4-13_13-20-51.png

    That is a pretty cool look. Looking into how todo it now. Sure its a simple trick.
     
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    riccoo

    riccoo Member

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    yer man let me know i am killing my self trying to figure it out
     
  9. cvidler

    cvidler Member

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    if your keying is removing colours it shouldn't you've got either (or both), a config problem (the key colour is not right and/or sensitivity config wrong), or your green screen is inconsistently lit (e.g. make sure you aren't casting shadows on it).
     
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  10. ni9ht_5ta1k3r

    ni9ht_5ta1k3r Member

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    it looks like a combination of chroma key and distortion of the video or at least it could be using some sort of triangulation to get the perspective correct.
     
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  11. SSJ4

    SSJ4 Member

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    Yeh I couldnt find a perspective transform option in OBS. It may only be in SLOBS. It's a very cool effect though.
     
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    riccoo

    riccoo Member

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    Keep in mind, OBS is not trying to be a Tricaster, and does not have any features built in that support that type of visual adjustment to sources...

    HOWEVER, there is a plugin that will get you closer to that. Try using the Stream Effects plugin for OBS Studio, which adds a number of filters, one of which is a 3D Transform filter which should do exactly what you need. The plugin can be found here : https://obsproject.com/forum/threads/stream-effects.76619/

    Keep in mind that the Filter, when applied to a source, will apply that filter to all copies of that source. If you want the source to work both non-filtered as well as filtered in different scenes, create a new scene containing JUST the source you want to adjust, and then apply the filter to that scene when it is added to the scene above. If that makes sense.

    Step By Step : Say you want to have a Video (Media Source) appear in the BIG display marked "C" on the above image (not the smaller ones).

    1 - Create new source called "Adjusted Video - Monitor C", and put your Video in that scene. Make the video take up the whole scene.
    2 - Add that scene, "Adjusted Video - Monitor C", to your scene above with the different monitors.
    3 - Add a filter to that scene/source (after installing the Stream Effects plugin). THe filter will be called "3D Transform" and it will appear at the very top of the Add FIlters menu.
    4 - Adjust the many options in that filter config to get the scene/source in the right position.

    The biggest issue you will have if you want to do this for a lot of scenes, especially duplicates, assuming in your image above, each of the C displays would show the exact same video/image/source. Since each needs its own, unique, 3D Transform applied to it, you would need to make a Scene for each one, since applying the filter to the original source video would force that transform to be used across all copies of it. Putting the video in multiple Scenes on its own allows you to basically have unique duplicates that can have their own filters applied that never effects the original video.

    This is especially handy for cameras since you can only pull a single stream of video from a camera.

    Its complex and crazy, but its the best we have at the moment.
     
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  13. Hater

    Hater Member

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    man, thanks for the follow up post, that's really cool
     
  14. Varg

    Varg Member

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