# Video-Demo {#viz2d_video}

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| Original author | Amir Hassan (kallaballa) <amir@viel-zu.org> |
| Compatibility | OpenCV >= 4.7 |

Renders a rainbow tetrahedron on top of a input-video using OpenGL, applies a glow effect using OpenCV (OpenCL) and decodes/encodes on the GPU (VAAPI).

@youtube{_FZlqui5DQA}

@include samples/cpp/video/video-demo.cpp