You can access commands either through the toolbar, menu or keyboard short cuts.
Figure 3.7: Play tools; (i) Play/Pause, (ii) Step one frame, (iii) Skip multiple frames
You toggle between playing and pausing a video or image project with the Play button or menu Settings->Pause or press space bar.
While a video or image project runs, a low resolution 3D point cloud is generated from each frame. Also, an anaglyph stereo image and a sparse depth map are created (these and other views can be shown with the show/hide window button).
When a video or image project is paused, a more detailed 3D model is generated. If only a coarse 3D model is generated, then make sure that Settings->Dense matching->Dense point cloud is checked.
To proceed one frame/image, click the next button or press arrow down. The next frame will be processed to the high resolution level, just as when a project is paused.
To skip multiple frames, click the fast forward button or press arrow right. The number of frames to skip for each clik can be set with Settings->Frames per step.... The frame stepped to will be processed to the high resolution level, just as when a project is paused.
In Settings->Set start frame (Ctrl+Alt+F) you define the current frames as the starting point, so that the videos/images are fast forwarded to these frames the next time the project is run.