Video Playback Interface

Previzion allows simultaneous playback of multiple pre-recorded video streams mapped onto 3D background geometry. When the virtual scene file is being loaded, Previzion will search through the file for any referenced textures with the video_ prefix, and list these textures in the Video File interface. Each texture can then be individually selected and connected to a MPEG2 video on the hard drive.

To connect a texture, highlight the texture in the texture list. The list contains both the material that the texture is associated with as well as the texture name itself. Click Set Video File to pick the MPEG2 video file. The video file will be listed alongside the texture it is connected to, as seen above. To remove the video file linkage, click Remove Video File.

MPEG2 videos will play back at a 1:1 frame match to the incoming video rate, so they should be shot at the same frame rate as the live video to avoid sped-up or slowed down playback results.

MPEG2 videos can be paused and restarted by selecting the video/texture pair in the list, and clicking the Pause and Restart. The in point and out point of the video file can also be selected, by entering the Start(%) and End(%) times.

When editing the Start and End times, the selected video will automatically be paused, and the frame displayed will move to match the time selected in order to help find specific areas of the video.