[QLab] sluggish performance

[Vincent Olivieri]

> This could possibly be due to the subsequent sequence loading up when
> you hit go.  Try putting a dummy cue between sequences to prevent the
> next sequence from loading and see if that helps.

Will do.  Thanks.


>> In tonight's run, I noticed slow-down of the sounds. whenever there
>> were
>> more than 4 sound files running at once.
> 
> What do you mean by slow-down here?

For periods of 4 to 6 seconds, the pitch drops and the tempo slows down by
about 10%, as if I were manually slowing the spin of a reel-to-reel tape
deck.


>> 2.  My video programming is shown in this example:
>> 
>>   Q 1 VIDEO A.JPG
>>   Q 2 VIDEO B.JPG
>>   Q 3 VIDEO C.JPG
>>   Q 4 VIDEO FADE C.JPG
>> 
>>   Do I save processing power if I program according to this model:
>> 
>>   Q 1 VIDEO A.JPG
>>   Q 2 VIDEO B.JPG (cont)
>>       VIDEO FADE A.JPG (fade out)
>>   Q 3 VIDEO C.JPG (cont)
>>       VIDEO FADE B.JPG (fade out)
>>   Q 4 VIDEO FADE C.JPG (fade out)
> 
> I'm not sure I see how these map to each other (are the fades up or
> down?), and another factor would be how many of the cues need to be
> simultaneously visible.  But in general stopping earlier video cues
> when you're done with them will always help.

Ah, I'll try that.  The video cues are all full-screen with a little bit of
manipulation in QLab.  Only one video cue at a time is visible on the second
display, so even though both cue lists above would look the same to the
audience, if QLab keeps the image up until it's told to take it down, then
the first cuelist would actually have three videos displayed (C on top of B
on top of A) at the same time, whereas the second cuelist only shows one at
a time.


>> I'm running QLab 1.3.1,
> 
> One thing to check is that you're using the most recent version of the
> Video Cue, as some of the recent updates did optimize some of the
> memory allocation, which reduced the time it takes to load video
> workspaces.  Even with those optimizations, it's not perfect, but it's
> worth checking to make sure at least those optimizations are available
> to you.

I'm not sure if I am or not.  I was current as of a couple of weeks ago, but
experience (with software in general, not QLab specifically) has taught me
to never upgrade once a show has been teched unless you know for sure that
the upgrade will help and not hurt.  Has anyone had any bad experiences with
the current video upgrades?  If not, I'll upgrade.

Vinnie