Clock Accuracy for timeline

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doce
Posts: 24
Joined: Wed Jul 08, 2015 6:14 am
Location: svizzera
Real Name: dominik

Hello there,
i am observing that on my Raspberry pi 2 running QLC+ 4.9 the clock of the timeline is far from precise.
this means the playback of a Showtrack with a length of 5:00 min takes approx. 6:00 to be played back.
this also means i cannot sync light cues with a videotrack played back on the Raspi.

the command " date " shows the correct interval of for example 1 minute.

Do you have a clue why the timing of QLC+ showtrack is not accurate and is delaying / lagging
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OddSocks
Posts: 152
Joined: Tue Apr 14, 2015 11:33 am
Real Name: Tim Cullingworth

Hi, can I ask what software you are using for the video output as I believed that for QLC you needed QT5 and that was an issue on the Pi.
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pogay
Posts: 14
Joined: Mon Jun 22, 2015 2:45 pm
Location: Basel, Switzerland
Real Name: Patrick Ogay
Contact:
Contact pogay

the video is playes via PIpresent. QLCplus for the light-show (on the same machine and it works so far).

On this installation (on a PI 2) we use an "standard" raspbian wheezy installation a few weeks ago I compiled qlcplus 4.8.5 (with qt4).
So I might be a problem of an internal qt-timer (two date commands in an interval of a minute shows the seconds correctly).
We tested it: actually in the qlcplus timeline 30 Second is 33 seconds on a clock, so it's 10% to slow, but stable und proportional.
For a workarround we converted the "time locations" manually. :mrgreen:

But on an other installation where we use an original qlcplus image of Massimo. We also have a strange phenomenon - two identical PI-installations (SD-Images) control two groups of 30 lights - the shows don't seem to run in an identlcal speed. (precise tests are outstanding ).

regards
Patrick
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plugz
Posts: 637
Joined: Sun Apr 12, 2015 6:30 pm
Real Name: David

Hi,

Can you run QLC+ with the -d option to enable debug output ?

If so, can you run your disfunctionnal show for 30 seconds, and then post QLC+ console output here ? Thanks :)
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Chris De Rock
Posts: 103
Joined: Tue Apr 14, 2015 6:54 am
Real Name:

the problem can be: the RpI has no RTC. But you can buy the RTC as extension board.
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wizarddd
Posts: 2
Joined: Tue May 22, 2018 6:10 pm
Real Name: xxxxx

pogay wrote: ↑Thu Jul 30, 2015 6:56 pm
We tested it: actually in the qlcplus timeline 30 Second is 33 seconds on a clock, so it's 10% to slow, but stable und proportional.
For a workarround we converted the "time locations" manually. :mrgreen:

But on an other installation where we use an original qlcplus image of Massimo. We also have a strange phenomenon - the shows don't seem to run in an identlcal speed. (precise tests are outstanding ).

regards
Patrick
Dear Sir
Ι have the same problem with Xp installation
changing machines with the same file (same program and file ) plays very well
I'm trying to make one show and every 10 seconds the QLC 4.11 clock loses 4 seconds
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