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.NVC File Extension

File Type 1	NeroVision Express Project File (Most common)
File Format	File
Common?	No
File Description	Video project saved by NeroVision Express (NVE) video-editing software; may also be a slideshow created by NeroVision Express that can be exported as video file; can be burned to a DVD when completed. NeroVision Express is included with versions 6 and later of Nero disc authoring software.
Program(s) that open nvc files	Windows: NeroVision Express (part of Nero 6 or later)

File Type 2	Nikon Vignette Correction File
File Format	Proprietary File
Common?	No
File Description	Used by Nikon Capture image-editing software to counteract the vignetting effect seen in a digital photo; often used on images saved in Nikon's .NEF RAW image format. Vignetting is an effect where the corners of a photo appear darker because the light was not evenly captured by the camera; it can also be a stylistic effect applied after the photo is taken.
Program(s) that open nvc files	Mac / Windows: Nikon Capture

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/nvc