[Interest] Rendering 3d object on webcam video

[Mike Krus]

Hi

try putting the camera first, then setting the clear colour of your frame graph to “transparent” ?


Mike

> On 3 Mar 2021, at 14:28, Alex john <blackbriar153 at gmail.com> wrote:
> 
> 
> Hello,
> 
> I am trying  to overlay a 3d object(.obj file) on top of the video, I could successfully load the .obj file and rendered it by refering to example https://doc.qt.io/qt-5/qt3d-wireframe-example.html, later I changed the code in main.qml by raping Entity from main.qml into Scene3D and tried to get the webcam rendered using QtMultimedia as below.
> 
> Rectangle{
> 
> Scene3D{
>             anchors.fill: parent
>             focus: true
> 
>   Entity {
>                 id: root
> 
>                 // Render  3d object same code as in https://doc.qt.io/qt-5/qt3d-wireframe-example.html
> 
>          }
> 
> 
> }
>  Camera {
>             id: camera
>             imageProcessing.whiteBalanceMode: CameraImageProcessing.WhiteBalanceFlash
>             exposure {
>                 exposureCompensation: -1.0
>                 exposureMode: Camera.ExposurePortrait
>             }
> 
>             flash.mode: Camera.FlashRedEyeReduction
> 
> 
>         }
> 
>         VideoOutput {
>             source: camera
>             anchors.fill: parent
>             //focus : visible // to receive focus and capture key events when visible
>         }
> 
> }
> 
> However, what happens is either the camera video is seen or the 3d object based on the sequence whichever is last. How can I get the 3D object on top of the video? any clues?
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—
Mike Krus | mike.krus at kdab.com | Senior Software Engineer & Teamlead
KDAB (UK) Ltd., a KDAB Group company
Tel: UK Office +44 1625 809908   Mobile +44 7833 491941
KDAB - The Qt Experts, C++, OpenGL Experts


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