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OnAudioPeak event not working

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OnAudioPeak event not working

Check the following points:

  • the OnAudioPeak handler must be assigned before invoking StartPreview, StartRecording or OpenPlayer: the audio level measurement is set up when the preview, the recording or the playback starts (in .NET: VideoGrabber.OnAudioPeak += ... before the start),
  • the source must deliver audio: for a video capture device, select the audio device, e.g. VideoGrabber.AudioDevice = VideoGrabber.AudioDeviceIndex ("Microphone (...)");, and for the player, the clip must include an audio stream (IsPlayerAudioStreamAvailable returns ts_True),
  • ActiveX version: the OnAudioPeak event requires a VU-meter to be enabled, e.g. VideoGrabber.VuMeter = vu_Bargraph; (see Audio levels and VU-meters),
  • the event is raised from the main thread (since version 16.6.1.8): the handler must return quickly, and the main thread must not be blocked (long loop, wait…), otherwise the events are delayed.

Note: the AudioPeakEvent property is obsolete, it no longer has any effect.

If the problem remains, please contact the support, with the messages returned by the OnLog event.

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