View Full Version : Live VJ broadcast problems!
13th November 2002, 12:57 PM
We're trying to get video out (QuickTime Video Output Component) from one Mac running OS9.2 via firewire into another Mac, which is running QuickTime Broadcaster.
Problem: no signal
We *can* get a signal out to a DV camera, but *not* into QuickTime Broadcaster.
13th November 2002, 02:42 PM
not a mac dude just yet, by my friend that is says something about "rendering to firewire..." dunno if that helps.
"Is it dangerous to be right when your government is wrong?"
13th November 2002, 05:48 PM
um, what software are you using to "send" the signal out via firewire? You may need an extra plugin or something.
if you can't send via firewire. you should send s-video to a capture card on the encoding machine.
14th November 2002, 12:05 PM
Home made software, using Jitter, which is part of the MAX/MSP authoring environment. There's a "QuickTime Video Output Component", which we're using.
No capture card on the encoding machine :-(
thanks for your advice. Still working on it - will try to contact cycling74.
14th November 2002, 05:49 PM
nice. we use nato objects. i know that there is a seperate firewire output object. that is required to output via firewire. i don't have any jitter objects. does jitter have rtsp capabilities?
17th November 2002, 12:31 AM
Yeah, we (well, not me personally but Matthew The Mighty Jungulator) managed to get an output via firewire using the "QuickTime Video Output Component". This picks up fine on a DV device like a Mini DV camera.
Problem is to get the QuickTime Broadcaster to see the output from another computer as though it's the output from a device.
Hmmm, how can you make it _masquerade_ as a device........
Will post details here when (!) we get it sorted. There must be a fair few VJs who want to do live broadcasts...
17th November 2002, 09:57 AM
I maybe wrong, but the reason why the first mac isn't being detected by the second is because it isn't a camera?
I'm not sure, but when you plug a camera into a firewire port it sends a message saying "Hi, I'm a camera!" and the computer treats it as such.
Is there any way of sending the signal to a dv cam and then back out again to QT?
18th November 2002, 01:45 AM
we send s-vid out of powerbook to dsr-11 dvcam deck. then s-out of dvcam to encoder. ati vr128 capture device. composite out to main monitor.
we have to have all devices connected and powered up before we start up the powerbook we mix from.
19th November 2002, 10:43 PM
Thanks for all your messages, much appreciated. Tried posting over the w/e but forum wasn't having any of it ;o)
You would have a thought a direct digital link would be possible, without having to go digital-analog-digital (eg with dvcam deck in the middle). Hm. I will pursue the output route ie, try to get the output to masquerade as DV Cam.
Will let you know how it goes. thanks again
junkmonkey (spannered but not beaten)
29th November 2002, 10:47 AM
Had an email back from one of the developers of Jitter (Cycling 74's visual authoring environment). And the answer is no: there isn't a way of making an application made with Jitter output video as if it were a DV camera.
On the encoder side, both QuickTime Broadcaster and Live Channel Pro don't have the capabilities to capture directly from a laptop.
If we wuz computer geniuses, then we could build our own software to build this bridge. But we ain't, so we won't ;-(. What we will be doing is building a client side desktop application (mac only) which will pull movies in from the web site.
Thanks for all your help!
29th November 2002, 11:27 AM
would this dv bridge (http://www.dazzle.com/products/hw_bridge.html) work?
It converts analogue to digital & back.
It also has a pass through....
Just a thought.
29th November 2002, 09:24 PM
Checked out the manual, seems like it *could* work!
Excellent, will try and buy one on spec - will let you know if it does work. Costs $300, which is cheaper than a decent DV camera.
many thankings in advance
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