For this week session, Encik Johari brought us to the control room in the Dewan Sultan Iskandar, UTM to see the process of video production of the Convocation Ceremony.
We have been exposed to several equipment in video production such as video mixer. according to Wikupedia,the definition of video mixer is ;
A vision mixer (also called video switcher, video mixer or production switcher) is a device used to select between several different video sources and in some cases Compositing (mix) video sources together to create special effects. This is similar to what a mixing console does for audio.
The main concept of a professional vision mixer is the bus, basically a row of buttons with each button representing a video source. Pressing such a button will select the video out of that bus. Older video mixers had two equivalent buses (called the A and B bus; such a mixer is known as an A/B mixer). One of these buses could be selected as the main out (or program) bus.
Most modern mixers, however, have one bus that is always the program bus, the second main bus being the preview (sometimes called preset) bus. These mixers are called flip-flop mixers, since the selected source of the preview and program buses can be exchanged. Both preview and program bus usually have their own video monitor.