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Forum: Old versions

Topic: Hello and video transparency

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Hi gang,
I was wondering if there was a way to using chroma keying or transparency with a video file
so I could have a video in deck 1 and then play back a video in deck 2 with transparency in it so you would just see certain objects over the top of the video in deck 1 any help or info in this matter would rock!
Cheers
 
Inviato Fri 09 Jun 06 @ 4:04 pm
ok looks like I got it now, making an uncompresed avi file with the alpha channel rendered into it, looks awsome esply with video scratching!
 
hmm actualy I dont have it, gues i need to figure out how to make a video file with transparency in it~
303AM
 
To my knowledge, there is no such thing as transparency built into a file. Also, the VDJ video fader does not support choma or luma key.

I have an EDIROL V4 external video mixer that I use to add ambient videos from an external dvd player, live crowd cams, and text messaging from a laptop running Text-Live. It has tons of effects (including choma or luma key).

Hope this helps.
 
Ok thanks saves me trying to do something that cant currently be done :)
im working with a VJ but our mixer turns the video monochrome once you chroma it, I guess we can work with that, basically just want to scratch little videos over the top of a another with a clean edge. you can create Quick times with alpha transparency in them from after effects apparently, a friend uses it but even if I made one of these files I have a feeling it wouldn't work in VDJ as the video on the decks are all on the same level meaning you cant put one video on a higher layer as another one, I guess what would be a really cool would be some more transitions like a multiply transition? are there any others out there I haven't seen that aren't on this site? seems like there could be some more useful transitions?
 
You have video plugins with a SDK (using Direct3D), don't forget them ;-)

In fact, you want to use a Fade transition :-)
 
yeah I figured a transition was what I needed, are you referring to the standed "fade" transition that comes with vjd? as that just puts the two video streams at 50% when the fader is in the middle, basically im trying to create transition that is a visual equivalent to the way a dj uses a cross fader to cut there scratching in and out over the top of some music

so if I have a clip playing in deck 1 when I scratch on deck 2 if I move the fader to the middle for a second id like to have the scratching video jump into the screen with out both sources being 50% ether with a multiply fader or some how chroma keying out the backround of the video on deck 2

I'm not sure what plugins your refiring to with the SDK?

used VDJ last night for the first time live and went prity well apart from the needle jumping so I couldn't use the TCV :( and one clip I tried to play made the computer almost crash but I think it was too big, an uncompressed avi (1gig) so not really VDJs fault.

what do you guys believe is the best video format? mpg1?

loving VDJ so far
 
I use .vob on my computer but it's video clip so around 250MB (Madonna - Sorry, 4min45s) and not 1Go ;-)

but of course you need a good video card
 
ok cool ill try out some vobs, basicly mpeg 2 i gues, im on a dell laptop with a 3.2p4 1.5 gig of ram and 128 ati radon mobility, sound is via a e-mu 1616m with the latency set farly low for the time coded vinyl (4-6ms) what res do you use 320x240 is all iv tryed so far.
 


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