Quicktime VS Isadora :: applescript ideas please

fubbi

hi, thanks for all your replies

The stutter is gentle and consistent over the duration of a 7 minutes loop. The screen is 60hz (can not be changed) and the movie 25 fps.
It is landscape images and I can see the problem in the movements of branches or flowers as they sway in the breeze.

I have tried infinite combinations of the frame rate and refresh sync options, with either chop pixels or stage output splitting of a single 5120px clip as well as single 2560 clips.
I have also tried a plethora of codecs. I scaled the double prores clip down from 5120px to 4000px in media encoder, thinking that I would have a safe backup option, but that did not fix the problem and the load spiked the same way (when showing stage).

Of course I have another computer, and also I will make it happen somehow. It's a mac mini with an SSD so I don't have unrealistic expectations (outside of pushing it to its limit).

But is it proprietary / priority business from apple, or has isadora somehow got a foot on the brake in this instance (or am I just not thinking about it in the right way)?
I feel like the question is relevant for me after having to conclude that isadora can't do what QT does and not being able to explain my failure, with all due respect and well aware that it might be my own incompetence.

I don't have the setup here anymore, as someone else is having a go at writing an applescript or VLC script. Next week I will have access again at the install.

Ciao

Woland

@fubbi said:

But is it proprietary / priority business from apple, or has isadora somehow got a foot on the brake in this instance (or am I just not thinking about it in the right way)?

This is something we can't answer until we can reproduce the problem ourselves, which I assure you we have a vested interest in doing. If there's a problem with our software, we want to identify it and eradicate it just as much (if not more) than you want our software to work in the way you need it to in this particular instance.

@fubbi said:

I feel like the question is relevant for me after having to conclude that isadora can't do what QT does and not being able to explain my failure, with all due respect and well aware that it might be my own incompetence.

Nobody is saying that you're incompetent, we're simply trying to hone in on what conditions are necessary in order to cause this issue to occur. Once we ourselves can reproduce it, we can work on a fix for it. We need to be able to have a solid repro so mark can look at the guts of Isadora while forcing the issue to happen so he can identify what exactly is causing it and then remedy it. To that end, it would be extremely helpful if you could open a support ticket and send us a link where we can download your media (a shortened version of it will work fine if the file is too large). I will go to our office today in order to pickup my second 4k monitor so that I can work with your media, on two displays with the same resolution as you have, on a Mac Mini (though my Mac Mini may be older than yours) so that I can be as close to your situation as possible. I promise we want to know why this is happening and how to have it not happen just as badly as you do.

Thanks for helping us work this out, we really appreciate it.

Best wishes,

Woland

fubbi

@woland are you at the HQ? If so this stuff is around the corner (linienstrasse) and I could show you, only if that makes it easier for you. Otherwise I will prepare the files you need.

Thank you

Woland

@fubbi

I can be there in 25 minutes. Want to meet at 6:30? I'll bring a hard drive to get the media and a notebook to write down any information I need.

fubbi

@woland I got your mail

fubbi

Big shoutout to @woland who went above and beyond, applied the magic touch and made it happen!

Thank you

Michel

@fubbi @Woland

Could you write here what the magic was incase someone else has the same problem? That would be great.

Best Michel

DillTheKraut

Just to give every body another point to think about (without getting into this specific case to much). I often recognized a high load with certain combinations of codecs and original files frame rate and a different monitors frame rate, which wasn't a multitude of the originals files. I just saw the difference here (original frame rate 25frames vs Monitor 60hz.) These differences require a lot of frame recalculations which results in a high load often, which isn't spiking immediately, but fast over a short time. I couldn't find any exact reasons/combinations yet, as it sometimes is more of an issue then in other situations. but probably this is proportionally higher with higher resolutions. Telling Isadora to render the 25 frames fixed without recalculating often isn't helping at all, even if the load is fine again.
In this case, I guess the frame recalculation is done somehow differently by the system (different algorithm?), which is more effective. But even then, there still might be some recognizable stutter. Depending on the footage (especially horizontal movement) seem to stutter because of the extra frames which are put in between to fit the 25 to 60 frame recalculation.
I have seen this last issue a lot in different software players beside Isadora, like QLab and Watchout as well. The interesting part here is, that this issue was differently pronounced.
It seems, the way of recalculation is done differently in every software. Plain movie player like Quicktime, Windows MoviePlayer and VLC doesn't seem to have this issue at all, using a different algorithm, maybe.

What ever, to avoid this issues in general, one should try it's best to match the frame rates in all over the supply chain. From camera recording to monitor/projector settings (Even the lighting conditions could be of matter, but this is a different story ;-) ).

Best
Dill

Woland

@michel said:

Could you write here what the magic was incase someone else has the same problem? That would be great.

Once I clean up my Applescripts and get a readme together, I'll be putting them on the Plugins Page.

I also need to change my AppleScripts to add dialogs allowing you to choose which file/script to launch (and then write that choice to a text file) so that they're usable, with some modifications, for others in different situations, without having to change my scripts that much.

fubbi

@michel it was a simple but complicated situation to describe, but something like this:

Room 1: Led wall 1024x1024px, one quicktime loop

Problem: The menubar/mouse pointer remains on show stages,

Solution: hide menus in sys prefs fixed the menu, but not the mousepointer but @woland fixed it with applescript

Room 2: 1 mac mini to play two monitors fullscreen.

Problem: Performance, described in detail in the posts above. A lot of permission issues with Mojave that made simple script solutions hard

Solution: Quicktime player and applescript

The script involves opening the clips, moving them to their respective screens, setting them to loop and finally play them both. Plus moving the mouse pointer out of the corner where it defaults on reboot and blocks the play controls from fading out.

Woland

@fubbi said:

it was a simple but complicated situation to describe

Exactly this. If I just posted the scripts I have now, they'd really only be useful to anyone trying to mount this, or a near-identical installation.

Once I make the scripts more "catch-all" the functions I built should actually be useful for other situations. I also need to write out a few steps about how to implement the scripts, change permissions, blah blah blah (boring but necessary stuff) before the scripts would be any good to anyone.

I want to make the little tools I made as accessible as possible, and right now they're very purpose-built to just serve this installation so I need to adapt them a bit before I put them out there.