[QLab] QLab Digest, Vol 18, Issue 7

Wed Jun 6 19:04:17 PDT 2007

Ok...This was my bad.  Just where you said it was Chris. Preferences/  
sound/ Draw the patch line in to default audio.  So previously when I  
used other software versions It had defaulted the patch to default  
audio device.  That is that it defaulted patch on my G4 mac mini.   
Strange.  Problem solved.  Thanks everyone.

On Jun 6, 2007, at 3:15 PM, qlab-request at lists.figure53.com wrote:

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> Today's Topics:
>
>    1. video fades are popping in (Jen Simmons)
>    2. Re: video fades are popping in (Christopher Ashworth)
>    3. Re: video cross fades - wha? (Gareth Jeanne)
>    4. Re: video fades are popping in (Steven Devino)
>    5.  USB Keypad for mac? (Paul Mellors)
>    6. Can't see intel mac's default audio device - HELP HELP
>       HELP!!! (Justin Freeman)
>    7. Re: Can't see intel mac's default audio device - HELP HELP
>       HELP!!! (Christopher Ashworth)
>    8. Re: Can't see intel mac's default audio device - HELP HELP
>       HELP!!! (Matt Otto)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 6 Jun 2007 10:01:06 -0500
> From: Jen Simmons <jensimmons at gmail.com>
> Subject: [QLab] video fades are popping in
> To: "Discussion and support for QLab users." <qlab at lists.figure53.com>
> Message-ID: <672A4EA0-7A00-4C08-96F8-8AA26CEC84AB at gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> When I "crossfade" between two videos, the incoming video does not
> fade up from 0%, but instead pops on at a low opacity and then fades
> up to full. It's annoying - and very visible (well visible to me).
> I've got everything programmed properly -- it seems to be a
> performance issue.
>
> Even if I set things so that the outgoing video plays at 100%
> constant, and the incoming video fades up from 0% ontop of the
> outgoing video -- it still pops on instead of fading from a true 0%.
> The videos are preloading (or at least they are getting a yellow ball
> signal and telling me they are preloading.)
>
> Specs:
> MacBook Pro 15" 2 ghz Intel Core Duo
> 2 gig RAM
> 160 gig 5400 rpm harddrive
> Radeon X1600 graphics card
> QLab is on the laptop harddrive, along with the OS
> 	
> Western Digital external harddrive
> 1 terabtye
> connected via Firewire 400
> stripped as one huge drive (RAID 0, I believe - not the RAID for
> extra performance)
> All media files and the QLab show file are on this drive.
>
> Ideas? Suggestions? Anyone else solve this??
> I've thought about putting a fade up on the front of each source
> file, but that's a pain + locks me into things...
>
> I would have expected a laptop this fast would have had no problem
> fading video.
>
>
> thanks,
> Jen
>
> Jen Simmons
> jen at jensimmons
> http://jensimmons.com
> http://milkweedmediadesign.com
> http://loveconjureblues.com
>
>
>
> ps. Yea for the new MacBooks with their NVIDIA GeForce 8600M GT
> cards, eh?
>
>
>
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> ------------------------------
>
> Message: 2
> Date: Wed, 6 Jun 2007 11:15:13 -0400
> From: Christopher Ashworth <chris at figure53.com>
> Subject: Re: [QLab] video fades are popping in
> To: "Discussion and support for QLab users." <qlab at lists.figure53.com>
> Message-ID: <37B5C397-8E90-4F30-B904-9071A57C90E8 at figure53.com>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> On Jun 6, 2007, at 11:01 AM, Jen Simmons wrote:
>
>> When I "crossfade" between two videos, the incoming video does not
>> fade up from 0%, but instead pops on at a low opacity and then
>> fades up to full.
>
> It's likely this is the same issue that Steve Devino first reported.
> I researched it carefully, and posed some questions to Apple's OpenGL
> mailing list.  It was determined that this can occur when the display
> device is not calibrated correctly (be it a monitor or projector).
>
> To confirm this I used a Spyder2Express to calibrate the monitor
> where I was seeing the behavior:
>
> http://www.colorvision.com/product-mc-s2e.php
>
> This fixed the problem on my external monitor.  It appears their
> higher-end product also can be used on projectors, although I have
> not used it myself.  The cheaper option is to try to calibrate as
> carefully as possible by hand.
>
> Best,
> Christopher
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 06 Jun 2007 16:20:48 +0100
> From: Gareth Jeanne <contact at garethjeanne.co.uk>
> Subject: Re: [QLab] video cross fades - wha?
> To: "Discussion and support for QLab users." <qlab at lists.figure53.com>
> Message-ID: <4666D0D0.1070309 at garethjeanne.co.uk>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> dFor pretty much all the formats you where talking about, you limit at
> hi-res is going to be about 10-15m befrore degredation occurs,  
> depending
> on cable and connector quality.
>
> A decent booster such as a P2/DA2 can boost RGBHV or VGA to about  
> 100m.
>
> Cheers
>
> Gareth
>
> Jen Simmons wrote:
>> Both of these comments help a lot!!!
>>
>> AH.... high quality coax is the cable of choice, then run either  
>> rgbhv
>> (5 strand), s-video (2strand)  or component (1 strand) signal over  
>> it,
>> depending on how much of it we can get and how much we can invest  
>> into
>> all the connections. Excellent. I love listservs.
>>
>> Any thoughts on when / if a boost to the signal is needed??
>>
>> thanks for taking the time to check out our plot,
>> Jen
>>
>>
>> Jen Simmons
>> jen at jensimmons
>> http://jensimmons.com
>> http://milkweedmediadesign.com
>> http://loveconjureblues.com
>>
>>
>> On Jun 6, 2007, at 2:17 am, Daniel Hoole wrote:
>>> Hi Jen
>>>
>>> If you lay two runs of decent coaxial cable, you can stick a  
>>> couple of
>>> those S-Video to two BNC Y-splitters on the ends, that way, you get
>>> the benefit of S-Video, but with a decent sheilding along the  
>>> length.
>>> A year or so back, I did a show with a Barco projector, where we  
>>> ran a
>>> double length of coaxial, in order to acheive an S-Video input  
>>> over a
>>> long length. Out of interest, we tried out the composite input on  
>>> the
>>> projector, to see the difference between S-Video and composite. The
>>> results were pretty surprising- I was sceptical about there being a
>>> tangible difference, but over the length we were sending it, S-Video
>>> looked way better!
>>> Hope this helps
>>>
>>> Dan
>>
>>
>> On Jun 6, 2007, at 12:09 am, Mike Benonis wrote:
>>
>>> Looking at your plot, if you can't get ahold of an RGBHV snake to  
>>> use
>>>
>>> for this, I would go with quality coax cable to run your video.
>>>
>>> While the resolution will be decreased from RGBHV, this is the best
>>>
>>> you can do with composite video.  S-video will not improve anything
>>>
>>> because the shielding in S-video cable is not nearly as good as in
>>>
>>> quality coaxial cable.  Heck, if you can get a spool of coaxial  
>>> cable
>>>
>>> (500 or 1k ft), just make your own RGBHV snake and use that!
>>>
>>>
>>> By quality coaxial cable, I mean quad-shield RG6 or better coax,
>>>
>>> terminated with quality RCA or BNC connectors (NOT the cheap  
>>> crimp-on
>>>
>>> ones you get at the Rat Shack, but Thomas and Betts or similar
>>>
>>> compression terminations).
>>>
>>>
>>> That help at all?
>>>
>>>
>>> Best regards,
>>>
>>>
>>> Mike Benonis
>>>
>>> Electrical Engineering '09
>>>
>>> Department of Drama Sound Engineer
>>>
>>> The University of Virginia
>>>
>>> mjb8h at virginia.edu <mailto:mjb8h at virginia.edu>
>>>
>>> (703) 577-3788
>>>
>>> KI4RIX
>>>
>>
>> --------------------------------------------------------------------- 
>> ---
>>
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>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 6 Jun 2007 11:33:51 -0400
> From: Steven Devino <sdevino at gmail.com>
> Subject: Re: [QLab] video fades are popping in
> To: "Discussion and support for QLab users." <qlab at lists.figure53.com>
> Message-ID: <9034B226-1D5D-4466-9DDF-63AD71607FB1 at gmail.com>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
>
> On Jun 6, 2007, at 11:15 AM, Christopher Ashworth wrote:
>
>>
>> This fixed the problem on my external monitor.  It appears their
>> higher-end product also can be used on projectors, although I have
>> not used it myself.  The cheaper option is to try to calibrate as
>> carefully as possible by hand.
>
> This is when you will find out just how crappy your projector systems
> are.
>
> :-)
>
> We were not able to calibrate the one we were using on the last show.
>
> Steve
>
>
> ------------------------------
>
> Message: 5
> Date: Wed, 6 Jun 2007 18:40:19 +0100
> From: Paul Mellors <paul at paulmellors.com>
> Subject: [QLab]  USB Keypad for mac?
> To: "Discussion and support for QLab users." <qlab at lists.figure53.com>
> Message-ID: <18268B76-05A6-42C4-909B-1C9185212378 at paulmellors.com>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> New user here. Can anyone advise of a USB ketpad which is mac
> compatible? I have a targus one which doesn't work in OSX but does
> work with Sibelius bizarely!
>
> I thought this would be an easy to find item but nearly all show as
> PC only.
>
> TIA
>
> Paul
>
>
>
> ------------------------------
>
> Message: 6
> Date: Wed, 6 Jun 2007 14:02:22 -0400
> From: Justin Freeman <jflights at mac.com>
> Subject: [QLab] Can't see intel mac's default audio device - HELP HELP
> 	HELP!!!
> To: qlab at lists.figure53.com
> Message-ID: <85A342C4-12E9-43E3-86B0-7FC39F6B1E93 at mac.com>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> My intel mac say's it doesn't have a default audio device when I look
> at output 1 in the qlab inspector.  In fact all 8 say no audio
> ouput.  When I load the program on my G4 mac mini there is no
> problem.  I really need to use my intel mac book pro to run this show
> though.  I need help....Ive been trying to work this problem for some
> time now and i am hoping someone else had this problem as well.
> Any suggestions.
>
> Justin
>
>
> ------------------------------
>
> Message: 7
> Date: Wed, 6 Jun 2007 14:08:05 -0400
> From: Christopher Ashworth <chris at figure53.com>
> Subject: Re: [QLab] Can't see intel mac's default audio device - HELP
> 	HELP	HELP!!!
> To: "Discussion and support for QLab users." <qlab at lists.figure53.com>
> Message-ID: <9C53E97D-A6F3-47C2-A03B-147C77BB5526 at figure53.com>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
>
> On Jun 6, 2007, at 2:02 PM, Justin Freeman wrote:
>
>> My intel mac say's it doesn't have a default audio device when I look
>> at output 1 in the qlab inspector.
>
> Have you looked at the preferences for the sound cue?  This is where
> you assign the output patches to the audio devices.  I was under the
> impression from your earlier email offlist that you had looked here,
> but I just want to make sure you did because you say above you're
> looking at the inspector.
>
> Best,
> Chris
>
>
> ------------------------------
>
> Message: 8
> Date: Wed, 6 Jun 2007 15:15:07 -0400
> From: Matt Otto <mottosfx at gmail.com>
> Subject: Re: [QLab] Can't see intel mac's default audio device - HELP
> 	HELP	HELP!!!
> To: "Discussion and support for QLab users." <qlab at lists.figure53.com>
> Message-ID: <2AA643F1-7366-4D0A-A744-B4923498C0A7 at gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> You might also need to check the OS X preferences for sound. Usually
> it defaults to the internal sound card when nothing else is present
> but who knows.
>
> Have fun,
> =Matt Otto
> off list: mottosound at gmail.com
> www.mattottosound.com (work in progress)
> AIM: ottoman42
>
>
> On Jun 6, 2007, at 2:08 PM, Christopher Ashworth wrote:
>
>>
>> On Jun 6, 2007, at 2:02 PM, Justin Freeman wrote:
>>
>>> My intel mac say's it doesn't have a default audio device when I  
>>> look
>>> at output 1 in the qlab inspector.
>>
>> Have you looked at the preferences for the sound cue?  This is where
>> you assign the output patches to the audio devices.  I was under the
>> impression from your earlier email offlist that you had looked here,
>> but I just want to make sure you did because you say above you're
>> looking at the inspector.
>>
>> Best,
>> Chris
>> ________________________________________________________
>> QLab mailing list   (QLab at lists.figure53.com)
>> WHEN REPLYING, PLEASE QUOTE ONLY WHAT YOU NEED.
>> Help us keep the signal/noise ratio of this list high.  Thanks!
>> Change your preferences or unsubscribe here:
>> http://lists.figure53.com/listinfo.cgi/qlab-figure53.com
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> End of QLab Digest, Vol 18, Issue 7
> ***********************************

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