<![CDATA[how to play/stop audio file(eg. mp3 file) using multi-threads?]]>how to play/stop audio file(eg. mp3 file) using multi-threads?
is QMediaPlayer thread-safe?
what i want is: open/play a mp3 in one Thread; while pause/stop/close the mp3 file in the other Thread. is there any good way to do this?
thank you!

]]>https://forum.qt.io/topic/102079/how-to-play-stop-audio-file-eg-mp3-file-using-multi-threadsRSS for NodeFri, 10 Jul 2026 23:01:29 GMTWed, 24 Apr 2019 16:57:12 GMT60<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Mon, 10 Jun 2019 19:58:32 GMT]]>Already answered here.

]]>https://forum.qt.io/post/534176https://forum.qt.io/post/534176Mon, 10 Jun 2019 19:58:32 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Mon, 10 Jun 2019 16:08:37 GMT]]>@opengpu said in how to play/stop audio file(eg. mp3 file) using multi-threads?:

QMediaPlayer

how to play .mp3 file in Windows. the filePath is C:\test\aaa.mp3

]]>https://forum.qt.io/post/534143https://forum.qt.io/post/534143Mon, 10 Jun 2019 16:08:37 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Thu, 25 Apr 2019 10:39:22 GMT]]>So why don't you simply do what @jsulm suggest and use signals/slots?

]]>https://forum.qt.io/post/525053https://forum.qt.io/post/525053Thu, 25 Apr 2019 10:39:22 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Thu, 25 Apr 2019 10:22:00 GMT]]>@jsulm i now have 2 threads, one is mainThread, and the other thread belong to some Callback func by some lib.
and play/stop can be both happen on these 2 thread...

]]>https://forum.qt.io/post/525037https://forum.qt.io/post/525037Thu, 25 Apr 2019 10:22:00 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Thu, 25 Apr 2019 08:51:16 GMT]]>@opengpu Why do you have two threads? If you really need two threads then simply send signals for pause/stop from the other thread and pause/stop in the main thread (where your QMediaPlayer is)...

]]>https://forum.qt.io/post/524979https://forum.qt.io/post/524979Thu, 25 Apr 2019 08:51:16 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Thu, 25 Apr 2019 08:51:06 GMT]]>@opengpu said in how to play/stop audio file(eg. mp3 file) using multi-threads?:

is QMediaPlayer thread-safe?

No.

]]>https://forum.qt.io/post/524978https://forum.qt.io/post/524978Thu, 25 Apr 2019 08:51:06 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Thu, 25 Apr 2019 08:49:24 GMT]]>@jsulm ok. so you mean i can just play/pause/stop in both mainThread and the other thread?
i am worried about : sometimes at the same time, stop() is trigered in mainThread & play() is triggered in the other thread...

]]>https://forum.qt.io/post/524975https://forum.qt.io/post/524975Thu, 25 Apr 2019 08:49:24 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Thu, 25 Apr 2019 04:37:34 GMT]]>@opengpu said in how to play/stop audio file(eg. mp3 file) using multi-threads?:

so should i open a new thread for QMediaPlayer

No. As @Christian-Ehrlicher already said playing media files is ASYNCH already. Playing media files does not block your main thread -> no need for any threads, don't overengeneer the task. To pause/stop simply call pause()/stop()...

]]>https://forum.qt.io/post/524937https://forum.qt.io/post/524937Thu, 25 Apr 2019 04:37:34 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Thu, 25 Apr 2019 02:48:03 GMT]]>so should i open a new thread for QMediaPlayer. and callback-thread & mainThread both send msg to the mediaPlayer thread?? and i just use the reference/pointer of the QMediaPlayer(means the QMeidaPlayer is thread-safe & can be used at different threads at the same time)?

]]>https://forum.qt.io/post/524924https://forum.qt.io/post/524924Thu, 25 Apr 2019 02:48:03 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Thu, 25 Apr 2019 02:44:29 GMT]]>Play & Stop event may trigger at the same time from different threads.....

]]>https://forum.qt.io/post/524921https://forum.qt.io/post/524921Thu, 25 Apr 2019 02:44:29 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Wed, 24 Apr 2019 17:47:20 GMT]]>@opengpu said in how to play/stop audio file(eg. mp3 file) using multi-threads?:

i need to play it in a callback

There is no reason for this to play an audio file in a separate thread since it's async...

]]>https://forum.qt.io/post/524852https://forum.qt.io/post/524852Wed, 24 Apr 2019 17:47:20 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Wed, 24 Apr 2019 17:15:04 GMT]]>yep. i need to play it in a callback which is not mainThread.
and while playing the mp3, i want to pause/stop the mp3 in mainThread by press a button.

]]>https://forum.qt.io/post/524840https://forum.qt.io/post/524840Wed, 24 Apr 2019 17:15:04 GMT<![CDATA[Reply to how to play/stop audio file(eg. mp3 file) using multi-threads? on Wed, 24 Apr 2019 17:03:07 GMT]]>Why do you want to use it in a thread at all?

]]>https://forum.qt.io/post/524834https://forum.qt.io/post/524834Wed, 24 Apr 2019 17:03:07 GMT