Video Toaster
From Free net encyclopedia
The NewTek Video Toaster is a combination of hardware and software for the editing and production of standard-definition NTSC and PAL video on personal computers. It comprises various tools for video switching, chroma keying, character generation, animation, and image manipulation.
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First generation systems
The Video Toaster was designed by NewTek engineer Brad Carvey, Tim Jenison and others.
The Toaster was released as a commercial product in October 1990 for the Commodore Amiga computer system, taking advantage of the video-friendly aspects of that system's hardware to deliver the product at an unusually low cost. The hardware component was a full-sized card which went into the Amiga's unique single video expansion slot rather than the standard bus slots, and therefore could not be used with the A500 and A1000 models. The card had several BNC connectors in the rear, which accepted four video input sources and provided two outputs (preview and program). This initial generation system was essentially a real-time two-channel video switcher.
One feature of the Video Toaster was the inclusion of LightWave, a 3D modeling, rendering, and animation program. This program became so popular and useful in its own right that it eventually became its own standalone product separate from the Toaster systems.
Aside from simple fades and cuts, it had a large variety of character generation, overlays, and complex animated switching effects. These effects were in large part performed with the help of the native Amiga graphics chips which were synchronized to the NTSC video signals; the result being that while the Toaster was rendering a switching animation the computer desktop display would not be visible. The Toaster hardware also relied on having very stable input signals, and therefore was often used along with a separate video sync generator to precondition the video sources. Third-party low-cost sync generators specifically designed to work with the Toaster quickly came to market, most of which were designed as standard Amiga bus cards (although they only used the bus to draw power and nothing more).
The video path through the Toaster hardware introduced significant delays in the signals, often between 100 to 200 ms. This delay would be quite noticeable when viewed along with the corresponding audio, and therefore it was also common practice to install audio delay circuits which would match the Toaster's video delay lag.
Although initially offered as just an add-on to an Amiga, it was soon available as a complete turn-key system which included the Toaster, Amiga, and sync generator. These Toaster systems became very popular, primarily because at a cost of around $5,000 US, they could do much of what a $100,000 profesional video switcher could do at that time. The Toaster was also the first such video device designed around a general purpose personal computer that was capable of delivering NTSC broadcast quality signals. As such, during the early 1990s the Toaster was used quite widely by many local television studios and was even used during The Tonight Show regularly to produce special effects for comedy skits.Template:Citeneeded It was frequently easy to detect a studio that used the Toaster by the unique and recognizable special switching effects.
The Video Toaster Flyer
For the second generation NewTek introduced the Video Toaster Flyer. The Flyer was a much more capable Non-linear editing system. In addition to just processing live video signals, the Flyer made use of hard drives to store video clips as well as audio and allow complex scripted playback.
The hardware component was again a card designed for the Amiga's Zorro 2 expansion slot. The Flyer hardware included three embedded SCSI controllers. Two of these SCSI buses were used to store video data, and the third to store audio. The hard drives were thus connected to the Flyer directly, rather than being connected to the Amiga's buses and were availble as regular devices using the included DOS driver. The Flyer used a proprietary Wavelet compression algorithm known as VTASC, which was well regarded at the time for offering better visual quality than comparable Motion JPEG based non-linear editing systems, and featured a proprietary filesystem layout.
Later generations
Later generations of the product use IBM-compatible systems and work with the Microsoft Windows operating system.
In 2004, the source code for the Amiga version was publicly released.