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Meaning of AVFoundation error codes -11800/-16364

It's very hard to know from AVFoundation error codes what is the exact error. For instance, I see the following message and don't know what error code means?

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Solution

  • -11800/-16364 is the error -16364 wrapped in the AVFoundation error -11800 (AVErrorUnknown).

    As far as I can tell -16364 is undocumented, but I associate it with timestamp misuses, like trying to encode CMSampleBuffers with non strictly monotonic increasing timestamps (repeating or decreasing). I guess that means the error originates in CoreMedia or VideoToolbox or something similar.