Qt5 affects abilty to find window in AltaCast

[mixxxbot]

Reported by: wunjo
Date: 2018-06-04T22:56:09Z
Status: In Progress
Importance: Low
Launchpad Issue: lp1775095
Tags: broadcast, qt5
Attachments: Qt5_Find_Window_AltaCast.PNG, output_file.txt, [Cyrillic in questinmarks](https://bugs.launchpad.net/bugs/1775095/+attachment/5150413/+files/Cyrillic in questinmarks), output_file.txt, [library can't print player do](https://bugs.launchpad.net/bugs/1775095/+attachment/5150881/+files/library can't print player do), [AltaCast printscreen.PNG](https://bugs.launchpad.net/bugs/1775095/+attachment/5150902/+files/AltaCast printscreen.PNG)

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After the change to Qt5 I can't grab metadata from the mainwindow of Mixxx no more using AltaCast for streaming.
Windows 7-64

[mixxxbot]

Commented by: wunjo
Date: 2018-06-04T22:56:09Z
Attachments: Qt5_Find_Window_AltaCast.PNG

[mixxxbot]

Commented by: daschuer
Date: 2018-06-05T16:46:18Z

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We are currently implementing more metadata output. I consider trading the window title as an ugly havk. Which other interfaces can be used by AltaCast? To which one do you like to switch for Mixxx 2.2?

[mixxxbot]

Commented by: davidhm
Date: 2018-06-06T14:25:27Z

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Does Altacast let you use a file to grab the metadata? Or can it use the MPRIS interface?

[mixxxbot]

Commented by: Be-ing
Date: 2018-06-06T15:10:36Z

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Why do you use a separate program to broadcast instead of broadcasting from Mixxx?

[mixxxbot]

Commented by: wunjo
Date: 2018-06-06T20:45:40Z

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@ Daniel; grabbing is ugly, but it did the job
@ David; a plain text file can be used, MPRIS is unknown to me
@ Be; I'm using Stereotool for compessing/expanding/enhancing etc. Routed by VBCable. DSP support would also be useful.

Thanks for your support!

[mixxxbot]

Commented by: wunjo
Date: 2018-06-06T21:05:45Z

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@ David; found a Python script for MPRIS in Clementine, ok for Linux, Windows don't use dbus

https://github.com/clementine-player/Clementine/wiki/Controlling-Clementine-from-the-commandline-with-DBus-and-MPRIS

[mixxxbot]

Commented by: daschuer
Date: 2018-06-06T21:14:19Z

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Could you file a separate bug for you effect request. Maybe we have already a LV2 solution in upcoming Mixxx 2.2 or we could integrate your needs natively...

[mixxxbot]

Commented by: davidhm
Date: 2018-06-07T10:00:07Z

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@peter, what format does the file have to be?

[mixxxbot]

Commented by: wunjo
Date: 2018-06-08T10:13:36Z
Attachments: output_file.txt

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@ David
I formerly used Sam Broadcaster, however they took another road.
They use a .txt file, see attachment

[mixxxbot]

Commented by: wunjo
Date: 2018-06-08T10:16:59Z

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@ Daniel
I will :-)

[mixxxbot]

Commented by: daschuer
Date: 2018-06-08T13:52:03Z

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Can you provide a file with non ASCII characters like umlauts or Cyrillic cjaracters as well?

[mixxxbot]

Commented by: davidhm
Date: 2018-06-08T14:08:37Z

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For writing to the file, I use QTextStream's operator << QString, which encodes the string with the locale codec. So if the author or the title are in Unicode I don't see a reason for it to not print non ASCII characters: http://doc.qt.io/qt-5/qtextstream.html#operator-lt-lt-12

[mixxxbot]

Commented by: daschuer
Date: 2018-06-08T15:25:24Z

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If the local8bit codec is latin1, you cannot print Cyrillic titles. I am not sure what is the default 8 bit codec in windows there is also cp848 or such things.
I know we had similar issues with m3u playlists. They are defined as latin1.
Because that does not work for any track, we have a successor that is m3u8 Wich is utf8.
Unfortunately the reader app cannot or hard distinguish utf8 from Latin one. If it fails, you get the famous ü.
If this is an issue, we need a preference option for the character encoding.

[mixxxbot]

Commented by: wunjo
Date: 2018-06-08T22:17:40Z
Attachments: [Cyrillic in questinmarks](https://bugs.launchpad.net/mixxx/+bug/1775095/+attachment/5150413/+files/Cyrillic in questinmarks)

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SAM can print umlauts but can't print Cyrillic.
In Cyrillic I get a string of questionmarks
see attatchment

btw Sam uses an inputfile too, containing: $song.artist$ - $song.title$ 

[mixxxbot]

Commented by: davidhm
Date: 2018-06-09T12:05:32Z

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@daniel, we an allow for the user to set the codec, no problem. However, if broadcast apps can read UTF-8, I think we should prefer that, because it allows for every language.

[mixxxbot]

Commented by: daschuer
Date: 2018-06-09T14:51:41Z

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Yes, right. I am only afraid that the majority of windows apps expect latin1.
And I am also afraid that the evetage user does not know the difference between latin1 and utf8. The issue is that it can be only identified at runtime, when suddenly an umlauts track is played. This might be too late. How about add a test mode, sending a fake umlauts track and ask the user if it is decided right.

[mixxxbot]

Commented by: davidhm
Date: 2018-06-09T15:58:45Z

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Maybe, but before all of that, shouldn't we need to know which encoding the broadcast app uses? It doesn't matter if the title is not displayed correctly if we don't know how to do it.

[mixxxbot]

Commented by: daschuer
Date: 2018-06-09T16:26:46Z

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Yes, right. It is not utf8, because of the question marks in Peters file.

Peter: can you attach an other SAM example with an umlauts title and €.

Critical are these as well: €‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ.

[mixxxbot]

Commented by: wunjo
Date: 2018-06-10T13:25:01Z
Attachments: output_file.txt

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@ Daniel
The question marks are added by SAM when importing in its library
I made a tag with the string provided by you, the library (mySQL) can't print them, but the payers do and also the output-file do.
Two attachments

[mixxxbot]

Commented by: wunjo
Date: 2018-06-10T13:27:02Z
Attachments: [library can't print player do](https://bugs.launchpad.net/mixxx/+bug/1775095/+attachment/5150881/+files/library can't print player do)

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screenshot SAM

[mixxxbot]

Commented by: wunjo
Date: 2018-06-10T13:56:03Z
Attachments: [AltaCast printscreen.PNG](https://bugs.launchpad.net/mixxx/+bug/1775095/+attachment/5150902/+files/AltaCast printscreen.PNG)

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btw forgot most important one :-)
see attatchment

[mixxxbot]

Commented by: wunjo
Date: 2018-06-18T18:22:40Z

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We can summarize that AltaCast users are probably Western users.
For Windows I was happy to find a free gui-based streamer with metadata capabilities, they are rare.
Utf8 will cover most of its users.

[mixxxbot]

Commented by: davidhm
Date: 2018-06-26T15:44:06Z

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I would like to test my code with a streaming service that allows files to input metadata. However, AltaCast is for Windows and I don't want to subscribe to SAM Broadcaster. Is there anything for Linux that's free / open source?

[mixxxbot]

Commented by: wunjo
Date: 2018-07-07T22:35:36Z

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Hi David, I'm back from vacation.

Rivendell is an open source Linux radio automation app. However, I have no experience with it.
As a free streaming service in Windows I use StreamerP2P; streamerp2p.com - You can download the broadcast version there. Feed it with AltaCast using your testbuild for Windows. 
I hope this can help you out?

[mixxxbot]

Commented by: wunjo
Date: 2018-07-10T21:41:27Z

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#1675
Seen your progress, however it's most abracadabra to me. Thanks!

[mixxxbot]

Commented by: davidhm
Date: 2018-07-10T21:55:18Z

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Is there anything for Linux? The file listener is implemented and the only thing left is to test it.

[mixxxbot]

Commented by: wunjo
Date: 2018-07-11T06:43:50Z

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I'll try to find something in vbox, takes some time however

[mixxxbot]

Commented by: wunjo
Date: 2018-07-11T16:07:09Z

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DarkIce must do the same as AltaCast in Windows however no metadata support.
https://github.com/rafael2k/darkice
IceCast does have such function, though it is an audio server
https://icecast.org/docs/icecast-trunk/admin_interface/
Ices is an input module for IceCast, it can handle metadata
https://icecast.org/ices/docs/ices-2.0.1/inputs.html

Maybe you can send me a link to a windows testbuild to test it?

[mixxxbot]

Commented by: wunjo
Date: 2018-07-11T21:09:11Z

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Butt will also do the job
http://danielnoethen.de/manual.html
see 6 streaming section

some more see http://www.icecast.org/apps/

[mixxxbot]

Commented by: wunjo
Date: 2018-09-27T18:22:26Z

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in progress see; https://github.com/mixxxdj/mixxx/pull/1675

[mixxxbot]

Commented by: daschuer
Date: 2019-09-14T23:29:53Z

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The original issue can be fixed by setting a different Window Class than the default.

The default is defined here:
https://github.com/qt/qtbase/blob/c7b3c5a082d9099e7995006f033c3017bfa7f19c/src/plugins/platforms/windows/qwindowscontext.cpp#L533

I have no idea if we can change this afterwards.

[mixxxbot]

Commented by: wunjo
Date: 2019-12-16T23:11:27Z

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<quote>The original issue can be fixed by setting a different Window Class than the default.</quote>

Indeed there are to many instances called Qt5QWindiwIcon, only one is the usable one.

some googling:

https://doc.qt.io/qt-5/qwindow.html#details

https://doc.qt.io/qt-5/qstring.html

Hope someone can find a fix :-)

[mixxxbot]

Commented by: wunjo
Date: 2019-12-16T23:26:56Z

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https://doc.qt.io/qt-5/qxmlstreamwriter.html could maybe useful

[mixxxbot]

Commented by: wunjo
Date: 2019-12-16T23:45:38Z

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https://vitux.com/compiling-your-first-qt-program-in-ubuntu/ quite an challenge to me...

[mixxxbot]

Commented by: daschuer
Date: 2019-12-17T07:17:04Z

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Here is a pretty straight forward guide to build Mixxx on Linux.
https://www.mixxx.org/wiki/doku.php/compiling_on_linux

If you are still struggling, I will help you out on https://mixxx.zulipchat.com/

In general this is a good start to read:
,https://mixxx.org/wiki/doku.php/bugfix_workflow

[mixxxbot]

Commented by: wunjo
Date: 2020-06-01T10:02:10Z

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Issue solved probably during recent changes in QT name assignment for windows.
There are now only two same assignments. Preferences and the main window.

[mixxxbot]

Commented by: wunjo
Date: 2020-06-11T21:14:23Z

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I was a bit to eager. It wasn't fixed in the Deere skin, there were 5 same named windows...

[mixxxbot]

Commented by: wunjo
Date: 2020-06-11T21:30:07Z

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I'm using the Tango skin on mixxx-2.4.0-alpha-pre-master-git7412-release-x64, win 10 pro

It's about the Window Class Qt5QWindowIcon. If there is one instace of it, it is found by Altacast
Also checked Shade skin, is ok, Latenight ok too.