Error Message using AVFoundation

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Created May ’21

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I see a message in xcode 12.5 in the console when getting metadata for *.m4p files only. Does not seem to cause any issues that I know of, so thought I would ask around. Thanks!

Macos 11.3.1 xcode 12.5

Code Block let avasset = AVAsset(url: url as URL) as AVAsset
let metadata = avasset.metadata(forFormat: AVMetadataFormat.iTunesMetadata)
2021-05-08 20:08:42.072875-0500 AudioFile[3820:238663]  ca_require_noerr: [result = CB_GetComponentDescription

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Answer 1

Claude31 OP

May ’21

What is the complete error message you get ?

Do you query query a MatrixMixer AudioUnit ?
If so, may have a look here:
https://stackoverflow.com/questions/38315905/kaudiounitproperty-matrixlevels-in-swift

Note: line 1, you don't need all the cast.
In addition, if not url, it will cause compiler error. So, useless.

if url is effectively a URL, just write

Code Block let avasset = AVAsset(url: url)

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Answer 2

owingst OP

May ’21

I am not executing MatrixMixer.... Whenever code executes this line for a m4p audio file (song):

Code Block let metadata = avasset.metadata(forFormat: AVMetadataFormat.iTunesMetadata)

I get the same error five times.

Code Block 2021-05-09 11:30:29.323176-0500 AudioFile[1276:40266]  ca_require_noerr: [result = CB_GetComponentDescription (mComponentInstance, &desc), -50] (goto home;)
2021-05-09 11:30:29.323296-0500 AudioFile[1276:40266]  ca_require_noerr: [result = CB_GetComponentDescription (mComponentInstance, &desc), -50] (goto home;)
2021-05-09 11:30:29.323363-0500 AudioFile[1276:40266]  ca_require_noerr: [result = CB_GetComponentDescription (mComponentInstance, &desc), -50] (goto home;)
2021-05-09 11:30:29.323410-0500 AudioFile[1276:40266]  ca_require_noerr: [result = CB_GetComponentDescription (mComponentInstance, &desc), -50] (goto home;)
2021-05-09 11:30:29.323437-0500 AudioFile[1276:40266]  ca_require_noerr: [result = CB_GetComponentDescription (mComponentInstance, &desc), -50] (goto home;)

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Answer 3

Claude31 OP

May ’21

If code works OK, that's the most important.

From time to time, Xcode sends messages which should be ignored (they may be for debug use). Annoying but no real concern.

However, you'd better file a bug report, in case.

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