Switcher Device for Synchronized Multi-Camera Video Backgrounds
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Solution Overview
Problem
In virtual production systems using multiple cameras, background videos displayed on a large display may not adapt to the position and direction of individual cameras, leading to unnatural videos and potential overlap issues when switching between camera feeds.
Innovation Solution
A switcher device with first and second switch units and a control unit that manages video data switching, ensuring appropriate background videos are displayed and captured by each camera, with a predetermined delay time to synchronize and avoid overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plurality of cameras is used to capture videos from different positions, then the video content can be switched according to different viewing angles, but the background videos may overlap or become mismatched when switching between cameras
Solution Approach 1:
The system performs preliminary actions by pre-rendering background videos for multiple predetermined camera positions and directions before actual shooting. These pre-rendered backgrounds are stored and ready for immediate selection, ensuring that when camera switching occurs, the corresponding background is already prepared and can be instantly matched without overlap or mismatch issues.
Solution Approach 2:
The system dynamically selects and switches between different pre-rendered background videos based on the actual camera position and imaging direction during shooting. By making the background selection dynamic and adaptive to real-time camera parameters, the system ensures that the displayed background always corresponds to the current camera view, preventing overlap and maintaining reliability during camera switching.
2Manufacturing precision
If background videos are pre-rendered for multiple camera positions, then natural video capture is achieved, but the rendering time and system load increase
Solution Approach 1:
The system performs video rendering in advance during pre-production phases, creating a library of pre-rendered background videos for various camera positions and directions. This preliminary rendering eliminates the need for real-time rendering during actual shooting, significantly reducing on-set time and system load while maintaining high video quality through careful pre-planning and rendering.
Solution Approach 2:
The system merges multiple pre-rendered background videos into a unified selection pool that can be instantly accessed during shooting. By combining these pre-rendered elements into an integrated system with automatic selection based on camera parameters, the system achieves both high video quality and efficient time management during production.
3Productivity
If real-time background switching is implemented during camera switching, then synchronized video output is achieved, but system complexity increases
Solution Approach 1:
The system prepares all necessary background videos in advance for each camera position, storing them with clear identification markers. This preliminary preparation simplifies the real-time switching process by eliminating complex rendering operations during camera transitions, reducing system complexity while maintaining fast switching speeds through simple selection and display of pre-prepared content.
Data Source
AI summary
A switcher device includes: a first switch unit that receives, as video data to be displayed on a display, a plurality of pieces of video data including video content corresponding to each of a plurality of cameras as input, selects one of the plurality of pieces of video data, and outputs the selected video data; a second switch unit that receives a plurality of pieces of video data obtained by capturing a video displayed on the display by the plurality of cameras as input, selects one of the plurality of pieces of video data, and outputs the selected video data; and a control unit. The control unit performs control to cause the first switch unit to execute switching of the video data in response to a trigger of video switching, and, after a predetermined switching delay time, to cause the second switch unit to execute switching to video data by the camera corresponding to the video data after switching in the first switch unit.