Memory leak??

[Bas Vissers]

Dear all,

After all these years (from 1.2.x or so) of solving things myself (because QLab isn't that difficult) or by reading the posts here, I now have to call in your help! My set up is: 1 Mac Pro Late 2013 basic with now 24 GB Ram installed. This is connected to 4 HD displays (in a public area, portrait) by VGA-UTP-VGA and 1 monitor for qlab. Qlab loops a 2+ minute thing: A group consist of four 15s ProRes LT videos, each to one screen and all with a slide in and out. This happens 4 times then a 3s bumper across all screens. Then again 4 groups of videos and a bumper. Then start from the top.

So far no problem (other then Yosemite every now and then mess up all the screen resolutions!!!), but over time the memory usage is increasing. After three hours or so videos start lagging and at some point QLab crashes. So I made an applescript (not my expertise) to save and stop the running show, quit and restart every two hours. Meaning the screens in the street are black for ± 1min. But I have the feeling it is not 100% accurate. Besides that QLab also quits or stops playing every now and then 'with no reason' (therefore I made a different app that checks if QLab is running or not). So workarounds and workarounds for keeping my screens in the air. And still not stable. Please help.

Bas

[Steve Lalonde]

I'm interested in this discussion too. 

Had the same kind of problem with the memory. I made a purge script that would be sent in between some cues when possible. 

That was the quickest work around for the memory filling up I found. 

S 

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[Chris Ashworth]

Do the videos have an audio track? If so this is a memory leak in Apple’s code that we can not fix.

[Bas Vissers]

No audio involved at all. Only pro res LT videos and some png's (with fade and stops).

Op donderdag 21 mei 2015 18:48:53 UTC+2 schreef Chris Ashworth:

[espressodr]

Hi,

I have a similar effect going on - not sure if its memory related, but sounds like it.

I have a 2014 Macpro with the big video cards, 8 cores. My show has 4 screens running 1080 with normally only 2 at a time - occasionally 3. All cues are triggered from midi timecode. everything runs smoothly at startup then the machine slowly gets clunkier and clunkier with the video getting gradually more stutterier (not a word) over time.

I have a couple of videos that have audio, but I could possibly stripe this audio onto the machine sending MTC if you believe this is an Apple/audio problem. All my clips are proResLT.

Cheers,

DR 

[mic]

is it possible to know exactly which are the situations that make this problem arise? Playing ANY video file with audio, no matter which codec is used? Or any other way not to meet this bug?

thansk

michele

[espressodr]

As an update to my previous post, my main issue I believe was using screensharing, as I was programming at a FOH position via a MBP over a network cable. Luckydave from Figure53 was incredibly helpful and was able to look at my logs and offer some suggestions. Not sure if at this point I have a secondary problem with the display connections as this is what the logs indicate, but just wanted to note that the issue seems not to be a codec/audio/apple problem. All the stuttering and lagginess went away when I disconnected screensharing.

DR