This is somewhat related to the posts below. Maybe it's just that I'm spending a lot more time lately on video projects than I am in Second Life. Anyway, this is still something of a spanner post, but again, it's a technique that has a lot more video applications than it has anything really direct to say about Second Life, where photosourcing has something of a bad name.
Using Photographs to Enhance Videos of a Static Scene from pro on Vimeo.
The video pasted above here spells out a way to use photos to compensate for poorly shot video, or video that comes from a substandard source. At present I'm not sure the technique is commercially available, and it's not clear from what I've seen so far whether the grad student whose project it is has a plan to release this code into the cultural commons in a way that will make it widely accessible or a matter of open source.
There are weaknesses to this approach, foremost among which would be that I'd imagine using this method would require one to become extremely well organized with one's footage and the still that should, by all rights, be taken more or less at the same time as the video, unless one wants to wind up with some jarring mismatching of lighting conditions.
It may also require more sophistication about shooting technique than one can reasonably expect from most people likely to be drawn to the technique. Or perhaps not... only someone pretty obsessed is likely to take all the steps needed to use this method, as I see things.