I usually don't use poser for this but it fits this situation best. I have been asked to make a model, and animate it, for a music video. The other software doesnot support poser models or any poly models. What is the best way to go about adding my character to the video?

What other software? Unless you're rendering it all in 3D, I think the easiest way would be to make the Poser animation with a transparent background and then merge it in postproduction.

how do i make the background transparent, i.e. key color or what.

Er.... As far as I know - but I'm no animation expert - you render it as single frames and save as tiff or png, both of which has an alpha channel. I THINK there is some animation-format that supports transparency too, but I don't know for sure.

Best way depends on what video gear you have to work with.
If working with analog or a digital format that does not batch import stills with alpha channels (tif & png), then you can try rendering over a solid saturated color for a chromakey, but I've had pretty sloppy results with that & its tough to retain any background shadows.

Might be easier to go the other way and import the video into Poser as AVI background, then animate the composite and re-export for xfer back to video.

Well I don't have to really worry about shadows much, my characters are angels that are translucent. The music video is already shot, I am not sure what equipment my company uses since I am overseas right now and they are in Cali. I will suggest some Ideas to them. Another quick question, is there a way to do light effects such as lens flares in poser, I want to add a type of glow to my angels. Thanks for all the help.

I'm pretty sure that there's no software that'll create camera movement data that can be imported into Poser. The only way you can probably do it, is by opening the video footage as a background in Poser. Then you'll have to animate Poser's camera to match how the camera moved in the video footage. I suppose if you used Poser's 'ground plane' with the 'vanishing point' (line?) option turned on, it won't be impossible. (At the very least, you need to get the gound plane matched perfectly with the video.) The point is to build a temporary virtual scene that matches the scene in the video. take the objects out when you're ready to render.

Probably a LOT of work, tho. With all the camera's key frames being set to 'linear' in Poser, you'll probably still find yourself having to keyframe the camera's position for almost EVERY frame of the video. It depends on how much the camera was moved when the video was being made.

Use some of the 'shape props' (cubes; spheres) to match the position of stationary objects in the video, as closely as possible. I take it that you don't have any measurements from the video camera to any objects that are in the video that was made. (?) You're at a serious disadvantage, right from the start. Remember that for the next time.

You can save 'keyframe data files' from inside Poser's keyframe editor. DO THIS, CONSTANTLY! Otherwise, if your scene file goes corrupt, you'll be starting over with NOTHING.

As you get the ground plane and Poser objects (name them!) matched up with the video, write down the positions and dimensions you see under Poser's dials for them. If the scene file goes bad, you'll still have that, at least.

So you have a point of reference, to know what you're working with...
There's a program called "MatchMover" that does what you want to do. All it creates, is a camera position and rotation data file for programs like 'Max', 'Lightwave', etc..
It costs about $7,500.00

who's a geek? That would probably be me. Look at ICARUS, a camera tracking program produced by the University of Manchester. It's free for personal use, about $1000 a seat for professional use. You'll have to google search for it - "icarus, univeristy of manchester" Take your video footage shot with an uncalibrated camera, feed it into ICARUS, let the program chew on it overnight, and it spits out exact x,y,z camera coordinates for every frame. ICARUS spits out data to LightWave, MAX, MAYA and .TXT files which are human readable. I've used it with MAX and it works great. ...and you don't have to pay for it 'till you start making money with it.

Sorry, but the 'Icarus' project is finished. You can't get a free version of it anymore, and the free version's software has "Timed-out". They changed the name of the program to somthing else, and now you have to pay for it. The original post, was about camera matching animation with POSER, alone.

The name of the new tracking program is PFTRACK and It is expensive. Also, it is not compatible with POSER.