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Vic has several dithering algorithms for representing continuous-tone color video streams on color-mapped displays. The user can trade of run-time complexity with quality. An error-diffusion dither gives the highest quality but at the greatest CPU cost, while a direct color quantization results in the lowest CPU load but yields relatively low quality. An ordered dither (derived from nv) gives moderate quality with low complexity.
Video streams can be displayed simultaneously on a workstation display and on an external video output port, provided the hardware supports external output. This allows rendering a single stream to a full-sized NTSC/PAL analog video signal, which when viewed on an external monitor (or video projector) generally provides a more comfortable picture compared to video displayed in a small X window.