[macOS] panic when setValue activeVideoMinFrameDuration and activeVideoMaxFrameDuration

[wilsonlmh]

I tested some external USB UVC webcam on macOS. It works with alufers's patch under 0.10.x alufers@7852477
However, these two objc call panic:

            let _: () = unsafe {
                msg_send![self.inner, setValue:min_frame_duration forKey:active_video_min_frame_duration]
            };
            let _: () = unsafe {
                msg_send![self.inner, setValue:min_frame_duration forKey:active_video_max_frame_duration]
            };

Comment it out will work, but the framerate drop to ~1fps. I The min_frame_duration looks normal, and it even contain exact same value as if I choose internal Facetime camera while both selected the same framerate.

According to apple (https://developer.apple.com/documentation/avfoundation/avcapturedevice/activevideominframeduration), the exception should be invalidArgumentException, but the framerate is actually extracted from videoSupportedFrameRateRanges as required.

I don't have a clue. Also it's not able to catch even I disable the exception feature and use objc-exception::try(), although it might not help even if I can catch it.