QMediaPlayer issue(audio not playing after some time)

[dancaer69]

I have a problem with sound in my application, in which I use QMediaplayer. I cannot reproduse the issue when I'm running the app from pycharm, but when I'm running it as normal application from command line after some time(10-15mins or more) the sound stops and never plays again. And 2-3 times I had a complet freeze. After a freeze I get an error about /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstossaudio.so: cannot open shared object file:: to many open files.
And the last time when sound stopped i get this error:
(python3:22875): GStreamer-CRITICAL **: 17:18:23.046: gst_poll_wait: assertion 'set != NULL' failed
I have some small(3-4secs) waf files which activated by click of button or when timer finishes. Here is the code I use for sound play:

    def playSound(self,sound):
        player = QtMultimedia.QMediaPlayer(self)
        s=QtMultimedia.QMediaContent(QUrl(sound))
        player.setMedia(s)
        vol=self.horizontalSlider.value()
        player.setVolume(vol)
        player.play()

And I use this method in some places to load the files like this:

self.playSound("qrc:resources/sounds/end.wav")

Any ideas why this happens, and hopefully a way to fix this?