Can you loop a show?

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Luis García-Tornel

It worked for me... but I haven't the audio so this can an issue with that

We need some more info:

- Which OS are you using?
- Which version of QLC+?
- What format is your audio?
- What crash errors appear?
- Any other info you can provide
Luis García-Tornel

Ok, made some quick tests, and there is in fact some strange behavior in Windows. When the audio is ends later (or at the same time) than the last sequence there is a crash.

In my Ubuntu machine everything works fine even if the audio is longer.

As a walkaround for Windows:

-Create a new "dummy" sequence (with all channels at zero) that surpasses the audio.
-Make the chaser's hold time a little bit longer than your audio. In my machine and my test files I had to make it 0.30s longer than the audio to avoid crashes.

Check the test files that I'm attaching

or better still ... get linux! ;)
Attachments
test.qxw
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Caroline Lacroix

Thank you. I am using a Mac though… and it seems that I am not able to adjust the hold time for the chaser.. it just automatically is set to the end time of the show..I will try your dummy sequence fix and let you know how this goes. Thanks so much for helping me out! This is so very stressful!
Luis García-Tornel

So, you're on a Mac, then I must warn you, I think QLC+ is kind of buggy on MacOS. In the past Massimo had a hard time making it work on MacOS (and if I don't misremember whith audio).

Unfortunately, with a Mac I can't be of much help since I don't have one.

And with a project of such importance I would play safe and try to get a linux machine

EDIT: If you provide some specs of your machine (OS version, etc.) you may get better help
Massimo Callegari

There's a known nasty bug on OSX and audio end-of-stream.
https://github.com/mcallegari/qlcplus/issues/231

You have two options:
- go with another OS. I suggest Linux
- try to add a few seconds of silence to your audio track to pass the chaser total duration. See if it works
Caroline Lacroix

Thank you! I tried it on a Windows computer and the end of audio bug was still present, so I simply made the chaser loop before the end of the audio and it works fine now! Doing a 8hr test run tonight, then it's exhibition time! I'll post the video once I have one.

Thanks again for all the help!
Cheers!
thespfxman
Posts: 1
Joined: Thu Oct 19, 2017 9:22 pm
Real Name:

This is probably long solved, but this thread helped. I too was crashing at the end each time, then I realized I set my audio track to loop instead of single shot, after switching back it worked great.

Thanks all.
andreadj1972
Posts: 5
Joined: Thu Jul 01, 2021 8:22 am
Real Name: Andrea Croce

Sorry... I was wrong but I don't know how to delete it ...
Last edited by andreadj1972 on Thu Jul 01, 2021 7:45 pm, edited 1 time in total.
HarryManback
Posts: 2
Joined: Sat Aug 06, 2022 4:48 pm
Real Name: Albert

I'm also trying to loop a show. However the tips given here do not seem to fix my issue.

The shows is to be used for the lighting of a float for our annual flowerparade. I've made some scenes and chasers (probably a little bit messy, but it works for me)

To loop the show I created a case that contains the show, timed it exactly how long the audio is and set it to loop. When I start the chase everythings goes as programmed. But then when it is supposed to go for the second time the audio keeps playing, but my show does nothing, lamps just stay as the were when the case ended. I tried adding a fade out to the last scene in the chase, like described here, hower that seems to do nithing in my case. What's also weird is that even when I stop my chase the audio keeps playing. Sometimes even after closing qlc.

I'm Running it on a laptop with windows 10 pro version 21H2

Is there someway you guys can help me.

Thanks in advance for any tips and tricks



UPDATE
Kept on struggling with this issue and it seems it has something to do with timing. I made sure the last sequence stopped 10 or 20 ms before the end of the show / audio. Sometimes the loop works for 2 or 3 times, then "it gets stuck". Found out that audio keeps playing until the audio files is completely played.

The timing issue could that be caused by my cheap ali express usb2dmx (uDMX)? When checking the in/ouput section in QLC it sometimes doesn't show op, unplugging and replugging fixes this. Sometimes i get that windows sound that a usb connection has been lost or made during work in QLC. I also have an error with my system clock precision. It tells me I have 512 channels, DMX frame frequency is 30 HZ, systemclock precision fault.

Image

I've been looking for other usb2dmx solutions, could enttec open DMX usb be a solution to this error.

Albert
Attachments
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Last edited by HarryManback on Sun Aug 07, 2022 2:20 pm, edited 1 time in total.
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GGGss
Posts: 2662
Joined: Mon Sep 12, 2016 7:15 pm
Location: Belgium
Real Name: Fredje Gallon

Albert,

You have many questions inside 1 thread; please deduplicate for future use. (This thread started in 2014 ... can you reccon?)

In regards to your problem use master chaser with sub chasers.
Every song is a chaser on its own, use infinite time here
Your master chaser is bound to a VC control and is to contain all sub-chasers.
With this VC-widget you can set the next step (external or Loopback control)

I know - a workaround - chaser inside chaser is powerfull
All electric machines work on smoke... when the smoke escapes... they don't work anymore
HarryManback
Posts: 2
Joined: Sat Aug 06, 2022 4:48 pm
Real Name: Albert

Do I really need te use the virtual controls.

I thought jus putting my scenes in a time line would be sufficient



UPDATE

I'm now using an Enttec open USB. In my output settings all clock settings are good/ok. I made some adjustments to my time line, its nou 500 ms longer then my audio. All scenes and chasers (except master chaser) end a little bit earlier then the master chaser. I put a fade out on all last scenes (the fade out is 1m30s, my show is 1m31s). In VC I configured a button for starting the show.

It works. I now have a seamless loop. Thank you for your insights.
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