test/test_mediafile.py::OpusTest::test_read_audio_properties fails with mutagen 1.48.1

[jaimeMF]

On the builds for the openSUSE Tumbleweed package we have started to get an error on this test with the following message:

[   16s] =================================== FAILURES ===================================
[   16s] _____________________ OpusTest.test_read_audio_properties ______________________
[   16s] 
[   16s] self = <test.test_mediafile.OpusTest testMethod=test_read_audio_properties>
[   16s] 
[   16s]     def test_read_audio_properties(self):
[   16s]         mediafile = self._mediafile_fixture("full")
[   16s]         for key, value in self.audio_properties.items():
[   16s]             if isinstance(value, float):
[   16s]                 self.assertAlmostEqual(getattr(mediafile, key), value, delta=0.1)
[   16s]             else:
[   16s] >               self.assertEqual(getattr(mediafile, key), value)
[   16s] E               AssertionError: 52392 != 66792
[   16s] 
[   16s] test/test_mediafile.py:455: AssertionError
[   16s] =========================== short test summary info ============================
[   16s] FAILED test/test_mediafile.py::OpusTest::test_read_audio_properties - AssertionError: 52392 != 66792
[   16s] ============== 1 failed, 480 passed, 104 subtests passed in 1.30s ==============

On openSUSE We are using the version 1.48.1 of mutagen, which since version 1.48 provides the bitrate ( quodlibet/mutagen#704 ) and from my reading of the mediagen code it is being used instead of the one calculated by mutagen based on the file size.

I am going to modify the openSUSE package with the following patch:

Index: mediafile-0.17.0/test/test_mediafile.py
===================================================================
--- mediafile-0.17.0.orig/test/test_mediafile.py
+++ mediafile-0.17.0/test/test_mediafile.py
@@ -987,7 +987,7 @@ class OpusTest(ReadWriteTestBase, unitte
     extension = "opus"
     audio_properties = {
         "length": 1.0,
-        "bitrate": 66792,
+        "bitrate": 52392,
         "bitrate_mode": "",
         "encoder_info": "",
         "encoder_settings": "",

Feel free to use it or if you think it should be fixed on mutage I can open a bug there.