If you've got the Qt 5.12.8 (the version that ships with Ubuntu 20.04) examples installed + built, start playing a video with it, switch virtual desktops and the video stops (you can't hear it). Come back, and the widget is white, in some sense it forgot the video. The example's 'brother', multimediawidgets/videowidget, works as you'd expect: start playing a video, go to another virtual desktop, you can hear it still playing, come back, and it's carried on as you'd expect. Interestingly, if you first pause the video in the videographicsitem example, do the switch-and-back, the video correctly still shows and is resumable when you come back, so, it's just if you switch while playing. I presume it's a bug - can anyone think of a workaround? Thanks.
edit: This is the same for Qt 5.15.2, the latest Qt 5.x as I write. As for Qt 6.2.x (latest as I write), it didn't have that example - I've read that totally new versions of Qt take a while to get the multimedia stuff.
Related
I have a usb driver with multiple IOKitPersonalities each with a IOMediaIcon entry. all works fine if the usb devices are plugged in after the kext has been loaded (kext loads fine, is signed, etc.). but after reboot of the computer, only ONE of the usb devices shows the standard orange default usb image. if I unplug/reload kext/replug the usb device in, the image gets corrected.
Any thoughts?
(Details:
running Mac OS X 10.10.1 (I don't think I saw this problem before Yosemite, definitely not a problem on 10.6.8), all the Personalities are the same (except for the IDs (which are correct I think since the usb device loads correctly if I plug in after the kext is loaded) so it isn't mistake with the personality...)
I don't know how to fix your specific problem, but I can give you some pointers which may or may not be helpful (sorry, a bit too big for a comment, but not a proper answer):
The icon stuff is handled in user space, the only thing that the kernel should have to do in theory is set the IOMediaIcon before registering the service. Setting it in the personality should be fine.
In user space, Disk Arbitration takes over. You can download (most of?) the source code for it from Apple's Open Source Site.
A quick search reveals that the diskarbitrationd source code does indeed reference the IOMediaIcon, in DADisk.c
I don't know how well it works to recompile diskarbitrationd and substitute Apple's binary with your own, but if that works, maybe you can modify it to log output from the icon code, and get closer to your answer that way?
The other source of error I can possibly think of is that although the system gets the correct icon information, it can't actually find the icon file? I've heard about various bugs related to bundles and resources in the context of /System/Library/Extensions vs /Library/Extensions since they added the latter. If your icons are in your kext bundle, and you've switched to /Library/Extensions, try switching back to SLE.
I hope that helps your debugging efforts!
Happily working in (as much as you can ever be happy in) Xcode 4.5.2 when modifying a storyboard, Xcode crashed.
Ok, no worries, Xcode crashes all the time. Restart it we are stuck. I get the little spinner in the middle of Xcode as it attempts to open the three tabs I had open. But eventually stops responding.
After I force quit, I notice a single process that is still left running:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Xcode/Overlays/Interface Builder Cocoa Touch Tool --socketFD 30
I can sudo kill -9 this process all I want, but every time I open this project in Xcode, repeat performance.
Using the alt+shift+click trick for Xcode in the dock, I can open up a blank instance an open a different project just fine. No issues loading the storyboard view or anything.
I traced the issue to the one iPad storyboard I was working on. After doing Google research I opened up the storyboard in another editor and changed changed useAutolayout="YES" to useAutolayout="NO" and I was able to open the storyboard just fine in Xcode ... but none of my objects were there.
I could keep on pontificating... but I'm really hoping one of you have seen this before. Thanks!
This isn't an answer, but I had a similar experience. One thing I noticed was if I edited the Storyboard manually to disable AutoLayout, the UI objects were all still in the Storyboard, just with a height / width of 0. Not terribly helpful, as you still pretty much have to recreate everything from scratch (or at least since the last saved working version).
Xcode was crashing at load for me due to one pesky little misplaced tablecell. I couldn't load the program at all or import the storyboard and every solution I saw online failed. What I did was delete the story board, open the project, and then restored the most recent snapshot (always take snapshots!). It imported the previous storyboard and I hardly lost any work.
We have a website that we are planning to distribute in a device. It is basically a big web site with lots of pictures and information. The web site is already built using some flash and javascript. I am thinking on using ubuntu for this. My plan is to install ubuntu( server, maybe!) without a graphical enviroment( Gnome, KDE, etc...) and start a browser like firefox using X servers. I have already tried this using
Code:
xinit firefox
It works and loads firefox fine. I am also thinking to build a Simple UI that will be launched at start. This UI will have a button to start this website and maybe other programs.
I hope I made myself clear.
I would like to know what do you guys think about this? Does it sound like something feasible? Do you think its a good idea to do this way? Do you have any suggestions?
It terms of licensing I don't understand well. I know ubuntu is licensed mainly under GNU GPL and I know is open source. I know that you are required to have any modifications available. However I am not sure if that includes the source code for the web site or any other proprietary application that i create and include. My understanding is that you only need to have open source any changes made to the OS but not any configuration after it has been installed.
What about Qt which is liscenced GNU LGPL v. 2.1? Do i need to release the code for the UI i make or is it only the code for any changes made to Qt itself?
Thanks in advance to anyone that reads this. I have read a lot on this but I am not so sure i got it right. I would like to know if I am at least in the right path.
Any help will be appreciated.enter code here
Ubuntu is GPL - if you make any changes to the Ubuntu (or rather linux) kernel itself then you have to offer those changes to anyone you distribute Ubuntu to - that has nothing to do with any applications or data you use on the operating system.
Qt is LGPL - you can use Qt to make any application you want without releasing anything about your application. You only have to release any modifications you make to the Qt source code yourself - which you are unlikely to do.
You don't need Qt for any of this, you can have a browser run full screen at startup in Ubuntu (or any other linux), and you can have a simple start page which will also start other local apps with just html - this may be a lot easier.
There are also "kiosk modes" for most browsers which limit what features and tool bars are present so you can prevent users quitting the browser or loading/saving other data.
Finally check out xubuntu - it's a version of ubuntu with X but without Gnome or KDE
IANAL, but with LGPL you can dynamically link to Qt and not be required to license your own sources under LGPL.
The general rule of thumb is that your end user should be able to take code of LGPLed component, make modifications to it, and have your proprietary code work with it. This also means you can link statically to LGPLed code if you provide at least object files of your own code, so they can be relinked.
For linux I suspect the answer is yes as well, but I can't say anything specific.
Right now I have Phonon working on windows with a DS backend. However, it will not play certain mp3 files and although it appears to be playing m4a files (the song progress bar keeps moving) no sound comes out. The application is built using PyQt4 on Windows and is aimed at Windows users.
I know that this is not the fault of my program as when I replaced a file with one that did not play normally with one that did, the song played perfectly. I have downloaded phonon vlc, and tried to build it, but I cannot get CMake to create a makefile. Whenever I try, it tells me that the dev-cpp gcc is not able to make a simple test file.
I also tried downloading clementine and amorak to see if I could get that to work, but I have had the same problems there as well. Has anyone run into this sort of problem before?
I've run into the same problem recently. It seems to be that Phonon has a bit of a hissy fit about ID3 tags, particularly compressed ones. I've taken to creating a temporary copy of every mp3 that I open and using mutagen to delete the tags from that copy. I then open the de-tagged temporary file using PyQt/Phonon, and everything works as I expect. BTW, mutagen is awesome.
Phonon does have a bit of a habit of failing reasonably silently. This is what I do: check if your MediaObject is in a Phonon.ErrorState; if so check its errorString(), usually some incomprehensible message. Google this message and try to work from there.
Edit: Hmm, interesting. It's not Phonon having the problem, it's the DirectShow backend not being able to play the file with the compressed ID3 headers. While the "fix" I outline above does work, I found I was still having problems playing other types of files, e.g. .m4a, despite having the right codecs installed.
The solution was to install the K-Lite Codec Pack, and use the Win7DSFilterTweaker tool that comes with it to change the default decoder for the various codec types from "Microsoft" to "ffdshow". You might also need to run the ffdshow audio decoder configuration tool and tick the box marked Show dialog when an unknown application tries to load ffshow in the DirectShow control tab.
Allope,
I've recently bough Flex Builder 3 and I am completely dissatisfied with its reluctance to debug. It manages to debug a few times, but after that, it just doesn't want to "connect to the debugger".
Help?
There is no easy fix for this. You now have to join the rest of us waiting for Adobe to update Flex Builder with a fix they say they have.
You can find the long sad story here: http://bugs.adobe.com/jira/browse/FB-16153:
Basically, this is an issue that has been around for months. Adobe says it has a fix - however - they've not released that fix yet. Adobe reports it's a threading issue...
For the rest of us (waiting for this) - if you need to move forward you can:
A) Live with the problem (painful)
1) Note that in the bug text there are several attempts to work around this - sometimes people find ways to soften the issue - but no one reports a full fix
2) Note that people trying the LocalHost fix - sometimes report a gain in productivity - but in most cases they do not.
B) Switch SDKs from 3.2 (or 3.3) to 3.1 ---- No one knows why - but it fixes the problem (you can then include the SWFs you need for 3.2 directly
C) Develop on Mac [Not a smart ass answer - honestly - for whatever reason this bug is not on Flex Builder for the Mac]
Join the bug discussion - on Adobe's site - it's still active as people are still waiting for the fix.
Make sure you have the required Flash Debug Player.
http://www.adobe.com/support/flashplayer/downloads.html
If that doesn't help, you might have to re-install Flex Builder.
Are you running it on windows vista? It may be this issue:
http://blogs.msdn.com/expression/archive/2009/03/16/page-cannot-be-found-issue-when-previewing-via-expression-blend.aspx
The page is about silverlight, but I ran into the same issue a while back with the flex debugger, and had to add the following to my host file (which windows defender removed):
127.0.0.1 localhost
This is expanded more upon here:
http://circstar.com/FlashLabUnderground/?p=64
I've had similar problems but every-time it refuses to connect to the debugger i have justed downloaded and reinstalled the flash debugger and it works fine. It's a pain but until adobe do anything what can we do?
Have you the tried FlashDeveloper ide? you can build flex project with it and it quite frankly alot better than flex builder for code writing (not ui work).
Hope this helps
Jon
I'm not sure if you have the same symptoms, but I came across a similar problem on one of our development machines after installing Flex Builder 3. When trying to run our app in debug mode, flex builder took a long time to launch the app and eventually timed out, displaying some message about not being able to connect to the debugger.
I found this solution which worked a treat. While Flex Builder is trying to launch the app:
Go to the browser page containing your app/swf, right-click on the swf to bring up the flash context menu.
Select Debugger
Select Other Machine
Enter 127.0.0.1 in the text field
Click Connect and hopefully it works.
NB: If Flex Builder tried to launch the app in Firefox, the page never appeared. It was only when it launched in Safari that I was able to access the browser page and the flash context menu.