Interlacing two seperate clips???

[JaggerWolf]

Ok heres what i'm trying to do: I have a 3d video system that uses the shutter style glasses for viewing. I just received a second camcorder which is identical to my first one. I know that the 3d movies for my system are made by haveing two videos interlaced so that each frame of the movie is composed of a left and right image.

So using that as a start I have a rig which allows me to film with both cameras at once giving me a right and left eye perspective....but now the problem...How can I interlace those two clips??

Any help on this would be wonderful, I am told this can be done on adobe premiere but I dont have that nor do I want to buy that.

Thanks for any help.

[heinz-oz]

Did your other post http://phpbb.ulead.com.tw/EN/viewtopic. ... highlight= not yield the assistance you want? Since it is the same people who frequent both forums, I doubt you will get a different response here.

Maybe what you want to do is just the bit over the top for the average pro-sumer.

Double posting is usually not appreciated.

[Gorf]

If, by "interlacing" you mean it in the true video sense of the world (i.e. field-based display) then it's easy enough.

It's best if you shoot your original footage in "frame" mode, not "normal" mode. Otherwise, just deinterlace the footage.

Create a BMP file with your clip dimensions (e.g. 720x576) You need to alternate pixel rows black and white.

Put your left camera clip on V1. Put the right camera on V2, using a "gray key" overlay of the BMP. Put the 3D exported clip on V3.

If the left/right cameras are out od sequence with the 3D (i.e. you're seeing the left cam in your right eye & vice versa) just load the BMP into an image editor, invert it, and save.

If I were doing something like this, I would create separate left/right videos of the composited model, then interlace them, rather than tring to work with an already-interlaced model. Your render time in the 3D app will be no different, and working with separate videos for each eye will mean it's much easier to spot matchmoving problems.

Addendum: By that last bit, I mean that you can matchmove the left physical camera with the left camera in the 3D app, but unless you have perfectly aligned actual and virtual cameras, the right eye will see "slippage".

[JaggerWolf]

Thanks for the help Gorf. As far as double posting I didnt realize I was considering this forum is for media pro and the one I first posted in was for Video studio.

Gorf, I am filming using two seperate cameras mounted on a rig that puts them an eyes distance apart. I know interlaced video uses half a frame for one feild and half a frame for the other. So what I need to accomplish is putting the clip from camera one on field a, and the clip from camera 2 on field b. Then combine them into one stream, it sounds easy enough I figured if you could deinterlace a video then why couldnt two videos be interlaced just as easy...but im finding thats not the case.

Thanks for the help so far, any other suggestions would be great, i'm anxious so make this work.

[Gorf]

The method described above will put the output from two different cameras each onto their own field.

[JaggerWolf]

Ok i tried playing with it a little but cant seem to combined the two clips into one. I can put them each on their own video line but when I play them in the preview window only one video clip is visible. I have exported the clip to view in a video player and it looks the same.

If it worked right I should see a slightly doubled vision but i'm not getting that.

Sorry if i'm not quite catching this hahaha just started using these programs.

[Devil]

I suggest you may not be overlaying the line grid correctly. I think you will have to overlay black lines on one field and white lines on the other, making sure you have the project settings to upper or lower field first. If you don't understand overlaying, read pp 109-115 in the manual.

[Gorf]

It's all because MSP8's preview window is pants. In an effort to "dumb down" the program & make it more understandable to the masses (removing the need for "pro" at the end of its name) they have auto-deinterlaced it.

The picture below shows in the foreground "interlacing.bmp" and its attributes window. The background shows MSP8 and the image file on the timeline, and what the preview window shows. (The project is DV1, lower field).