Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

QTB - More than one instance

Here are my notes on this subject - good luck!
Pash
------------
Make up two Broadcasters say Broadcaster 1 and 2. They will need to be
duplicated from "QuickTime Broadcaster.app". You probably want to modify them
so that they have seperate names (all the way, do the executeable , the plist
entries and all the name references in the code ( use vi - it works on the
executeable code just fine. Don't change the length of any names!).

I use "QuickTime Broadcast01" ... 02.. 03..
etc. Edit the plist files so that they use seperate Preference files, and
set them up with different presets as well. If you are running from a script
you
should make multiple broadcasterctl programs as well. The trick here is
modify
the RemoteAdmin name in QuickTime Broadcast01.app and broadcast01ctl to they
match up and are unique.

Then hook up your first source, run Broadcast01 and set the configuration the
way want it.

Disconnnect the first source, hook up the second and set the configuratin for
Broadcast02 as well.

Lock down the presets. You can't lock up the
"com.apple.QuickTime BroadcastNN.plist" files so I
copy them over the Preferences with a script before I launch.

With some input devices you need to launch from the GUI, with others you can
launch with /usr/sbin/broadcasterctl. Either way once they are running you
can
control them with /usr/sbin/broadcasterctl.

Try it. I've managed to get 4 running on a Dual 1G XServe with a second
firewire card installed. There was till some CPU left when generating 250kbps
streams
and storing the result to disk. I use a USB A/D converter for the sound
input.

This was going to be my experiment, which I have not yet been able to
perform....

You can split a firewire output to five firewire ports with the Laird
"2 Input Switchable by 5 Common Output ULTRA SERIES Firewire DV
Distribution Amplifier"
at http://www.lairdtelemedia.com/products/ultraseries.html#DVDA

I have been able to get two copies of QTB on one Mac to each recognize
a different input on each separate firewire port, so I was going to
split the signal from the camera to the Laird distribution amp, and
take the two identical outputs to the two firewire inputs on the Mac.

However, I could not get the two copies of QTB to consistently and
always recognize each firewire port, this was with 10.1.5, maybe
Panther works better. If I can't do it consistently it's not much good!

As we are spitting analog signals and then converting them to digital,
it's easy for us to get the same signal to both machines. I don't know
how you'd split the firewire out of a camera.



I have been able to share a USB audio input with several copies of QTB,
I explained how at http://video.conncoll.edu/audio-streaming.pdf
Other people have been doing this also.

This works with the iMic, the Telex H-531 digital USB mic, and the
Edirol UA-3. Also, when I routed different signals, one from each of
the 3 devices, through a Griffin USB-Audio Hub, I was able to encode
each separate input. I do realize that USB audio may not be good enough
quality for some uses. There are, however, better USB analog-to-digital
audio devices available than the above. Not sure about the MBox though,
Digidesign audio seems to work a bit different than the rest, I would
not be surprised if it can't be shared.


I run 2 examples of QTB audio only, and I use a DigiDesign TDM card
as a clean audio source. But the first instance of QTB seizes the
card. I assumed it was Digi's driver at fault, it seems to me an
output bus should be able to drive any number of inputs... So I'm
running the narrow band version from the analog input.

Maybe Audio Hijack Pro, or Wiretap, could fan out an audio signal,
don't know about video tho' :-(






------------
On Mar 18, 2005, at 9:53 AM, chris wrote:

Note that to run more than one Broadcaster and use more than one
broadcastctl you need to modify there communication
link.

You can run more then one Broadcaster on a machine at the same time?!?

How? 

 _______________________________________________
Do not post admin requests to the list. They will be ignored.
Streaming-server-users mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/streaming-server-users/email@hidden

This email sent to email@hidden
References: 
 >Re: CLI for QT Broadcaster (From: chris <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.