PyQt5 QMediaPlayer ResourceError with seemingly valid QUrl

ghidx0

I've started to build an application in PyQt5, and have run into a little puzzle. After building my QVideoWidget, and hooking the display of a QMediaPlayer to it I've invoked

Within the QVideoWidget subclass, I've attempted to setMedia to the QMediaPlayer

content = QMediaContent(url)
self.mediaPlayer.setMedia(content) # self.mediaPlayer is my QMediaPlayer instance

I've connected a slot for the QMediaPlayer 's error signal

self.mediaPlayer.error.connect(self.handleError)

And so, after invoking setMedia as described above, I do get a call to self.handlError

    def handleError(self, *args, **kwargs):
        self.playButton.setEnabled(False)
        errors = dict({0: "NoError", 1: "ResourceError", 2:"FormatError", 3:"NetworkError",
                       4:"AccessDeniedError", 5:"ServiceMissingError"})
        errorString = self.mediaPlayer.errorString()
        message = "Error: "
        if errorString:
            message += errorString
        else:
            error = int(self.mediaPlayer.error())
            message += F'{error} : {errors[error]} with {self.mediaPlayer.currentMedia().canonicalUrl()}'
        self.errorLabel.setText(message)

In the code above I also investigate the media player itself to inspect its error() results. The error is identical to the error handler slot signal, a PyQt5.QtMultimedia.QMediaPlayer.Error args, which interprets as 1, a ResourceError according to the QMediaPlayer docs QMediaPlayer Error enum

However, I can investigate the QUrl in the debugger. I place a breakpoint at that last line self.errorLabel.setText(message) and then test the MediaContent's url, which resulted in this ResourceError

In[8]: filepath = self.mediaPlayer.currentMedia().canonicalUrl().toLocalFile()
In[9]: os.path.exists(filepath)
Out[10]: True
In[10]: os.access(filepath, os.R_OK)
Out[11]: True
In[11]: os.access(filepath, os.W_OK)
Out[12]: True

I am at a loss as to the cause of the Resource Error. Can anyone point me in the right direction ?

SGaist

Hi,

What is the path you are using ?

ghidx0

@SGaist
I create a QUrl from a user argument, which is passed through a validator to confirm that it is valid. The string representation of that url is:

file:///home/gary/src/opencv/tutorials/samples/video_lit.h264.mp4

As in my reference to the debugger session, I can round trip the QUrl, after validating it. I build a Qurl, then I can pull the path
filepath = self.mediaPlayer.currentMedia().canonicalUrl().toLocalFile()
and test its existence, as well as my access to the file.

SGaist

Did you try with a file from another container/format ?