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Track errors that can occur when requesting, managing, or using audio/video media tracks.

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Error Constants

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CONSTRAINT_FAILED

Value: gum.constraint_failed Cause: Some requested constraints in getUserMedia call were not satisfied. When it occurs:
  • Requested resolution not supported by camera
  • Frame rate constraints cannot be met
  • Audio constraints incompatible with device
  • Requested facing mode not available
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['video'],
    resolution: 4320, // 8K - likely unsupported
    constraints: {
      video: { frameRate: 120 }
    }
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.CONSTRAINT_FAILED) {
    // Retry with lower constraints
    console.warn('Requested constraints not supported. Trying defaults.');
    const tracks = await JitsiMeetJS.createLocalTracks({
      devices: ['video']
      // Use default constraints
    });
  }
}

​
ELECTRON_DESKTOP_PICKER_ERROR

Value: gum.electron_desktop_picker_error Cause: Generic error selecting a DesktopCapturerSource in Electron app. When it occurs:
  • Electron desktop picker encounters an error
  • Screen selection process fails
  • Desktop capturer API issues
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['desktop']
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.ELECTRON_DESKTOP_PICKER_ERROR) {
    console.error('Desktop picker error in Electron.');
    showNotification('Failed to access screen sharing. Please try again.');
  }
}

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ELECTRON_DESKTOP_PICKER_NOT_FOUND

Value: gum.electron_desktop_picker_not_found Cause: Custom desktop picker could not be detected for the Electron app. When it occurs:
  • Desktop picker not properly configured in Electron
  • Missing Electron desktop capturer integration
  • Custom picker implementation not found
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['desktop']
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.ELECTRON_DESKTOP_PICKER_NOT_FOUND) {
    console.error('Desktop picker not configured in Electron app.');
    // Fall back to extension-based screen sharing if available
    fallbackToExtensionScreenSharing();
  }
}

​
GENERAL

Value: gum.general Cause: Generic getUserMedia error. When it occurs:
  • Unspecified media device errors
  • Browser API failures
  • Unexpected getUserMedia rejections
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['audio', 'video']
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.GENERAL) {
    console.error('General media error:', error.message);
    // Provide user-friendly error message
    showNotification('Unable to access camera/microphone. Please check device settings.');
  }
}

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NOT_FOUND

Value: gum.not_found Cause: Requested device was not found. When it occurs:
  • No camera available on device
  • No microphone connected
  • Specific device ID not found
  • Device disconnected during request
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['audio', 'video'],
    cameraDeviceId: 'specific-device-id'
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.NOT_FOUND) {
    console.warn('Requested device not found.');
    // Retry without specific device ID to use default
    const tracks = await JitsiMeetJS.createLocalTracks({
      devices: ['audio', 'video']
    });
  }
}

​
PERMISSION_DENIED

Value: gum.permission_denied Cause: User denied permission to access the requested device. When it occurs:
  • User clicks “Block” on permission prompt
  • Browser settings block media access
  • System permissions deny access
  • Site permissions previously denied
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['audio', 'video']
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.PERMISSION_DENIED) {
    console.warn('User denied media permissions.');
    // Show instructions for granting permissions
    showPermissionInstructions();
    // Optionally allow joining without media
    proceedWithoutMedia();
  }
}

​
SCREENSHARING_GENERIC_ERROR

Value: gum.screensharing_generic_error Cause: Generic error for screen sharing failure. When it occurs:
  • Screen sharing API failures
  • Display capture errors
  • Browser compatibility issues
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['desktop']
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.SCREENSHARING_GENERIC_ERROR) {
    console.error('Screen sharing failed.');
    showNotification('Unable to share screen. Please try again.');
  }
}

​
SCREENSHARING_NOT_SUPPORTED_ERROR

Value: gdm.screen_sharing_not_supported Cause: getDisplayMedia is not supported or available. When it occurs:
  • Browser doesn’t support getDisplayMedia API
  • Electron app without permission handler
  • Insecure context (non-HTTPS)
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['desktop']
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.SCREENSHARING_NOT_SUPPORTED_ERROR) {
    console.error('Screen sharing not supported in this environment.');
    showNotification('Screen sharing is not available in your browser.');
    // Suggest browser upgrade or extension installation
  }
}

​
SCREENSHARING_USER_CANCELED

Value: gum.screensharing_user_canceled Cause: User canceled screen sharing window selection dialog. When it occurs:
  • User clicks “Cancel” on screen picker
  • User closes screen selection dialog
  • User dismisses without selecting a source
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['desktop']
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.SCREENSHARING_USER_CANCELED) {
    console.info('User canceled screen sharing.');
    // No error notification needed - user intentionally canceled
    // Just proceed without screen sharing
  }
}

​
TIMEOUT

Value: gum.timeout Cause: Timeout passed to obtainAudioAndVideoPermissions expired without getUserMedia resolving. When it occurs:
  • getUserMedia takes too long to respond
  • Permission prompt left open too long
  • Device initialization hangs
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['audio', 'video'],
    timeout: 30000 // 30 seconds
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.TIMEOUT) {
    console.error('Media request timed out.');
    showNotification('Camera/microphone request timed out. Please try again.');
    // Retry with longer timeout or different devices
  }
}

​
TRACK_IS_DISPOSED

Value: track.track_is_disposed Cause: Track has been disposed and cannot be used anymore. When it occurs:
  • Attempting to use track after calling dispose()
  • Operating on cleaned-up track
  • Using track after it’s been removed from conference
Handling recommendations: 
const localTrack = tracks[0];
localTrack.dispose();

try {
  room.addTrack(localTrack);
} catch (error) {
  if (error.name === JitsiTrackErrors.TRACK_IS_DISPOSED) {
    console.error('Cannot use disposed track.');
    // Create a new track instead
    const newTracks = await JitsiMeetJS.createLocalTracks({
      devices: ['video']
    });
    room.addTrack(newTracks[0]);
  }
}

​
TRACK_NO_STREAM_FOUND

Value: track.no_stream_found Cause: Track has no MediaStream associated. When it occurs:
  • MediaStream was not properly initialized
  • Stream was detached or lost
  • Track creation incomplete
Handling recommendations: 
try {
  // This should not normally occur with standard API usage
  const stream = track.getOriginalStream();
} catch (error) {
  if (error.name === JitsiTrackErrors.TRACK_NO_STREAM_FOUND) {
    console.error('Track missing MediaStream.');
    // Recreate the track
    track.dispose();
    const newTracks = await JitsiMeetJS.createLocalTracks({
      devices: [track.getType()]
    });
  }
}

​
TRACK_NO_STREAM_TRACKS_FOUND

Value: track.no_stream_tracks_found Cause: No tracks were found in the media stream. When it occurs:
  • MediaStream has no audio or video tracks
  • Tracks were removed from stream
  • Empty MediaStream provided
Handling recommendations: 
try {
  // Creating track from MediaStream with no tracks
  const track = new JitsiLocalTrack({
    stream: emptyMediaStream,
    // ...
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.TRACK_NO_STREAM_TRACKS_FOUND) {
    console.error('MediaStream contains no tracks.');
    // Create tracks using createLocalTracks instead
  }
}

​
TRACK_TOO_MANY_TRACKS_IN_STREAM

Value: track.too_many_tracks_in_stream Cause: Too many tracks in the provided media stream. When it occurs:
  • MediaStream contains multiple audio/video tracks
  • Expected single track but got multiple
  • Stream aggregation errors
Handling recommendations: 
try {
  // MediaStream with multiple video tracks
  const track = new JitsiLocalTrack({
    stream: streamWithMultipleTracks,
    // ...
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.TRACK_TOO_MANY_TRACKS_IN_STREAM) {
    console.error('MediaStream has too many tracks.');
    // Split stream into individual tracks
    const videoTrack = stream.getVideoTracks()[0];
    const singleTrackStream = new MediaStream([videoTrack]);
  }
}

​
UNSUPPORTED_RESOLUTION

Value: gum.unsupported_resolution Cause: Requested video resolution is not supported by the webcam. When it occurs:
  • Resolution exceeds camera capabilities
  • Aspect ratio not supported
  • Camera doesn’t support requested dimensions
Handling recommendations: 
try {
  const tracks = await JitsiMeetJS.createLocalTracks({
    devices: ['video'],
    resolution: 2160 // 4K
  });
} catch (error) {
  if (error.name === JitsiTrackErrors.UNSUPPORTED_RESOLUTION) {
    console.warn('Requested resolution not supported.');
    // Fall back to lower resolution
    const tracks = await JitsiMeetJS.createLocalTracks({
      devices: ['video'],
      resolution: 720 // HD
    });
  }
}

​
Usage Example

import { JitsiTrackErrors } from 'lib-jitsi-meet';

async function createTracks() {
  try {
    const tracks = await JitsiMeetJS.createLocalTracks({
      devices: ['audio', 'video'],
      resolution: 1080,
      timeout: 30000
    });
    return tracks;
  } catch (error) {
    console.error('Track creation failed:', error);
    
    switch (error.name) {
      case JitsiTrackErrors.PERMISSION_DENIED:
        handlePermissionDenied();
        break;
      case JitsiTrackErrors.NOT_FOUND:
        handleDeviceNotFound();
        break;
      case JitsiTrackErrors.CONSTRAINT_FAILED:
      case JitsiTrackErrors.UNSUPPORTED_RESOLUTION:
        // Retry with default constraints
        return retryWithDefaults();
      case JitsiTrackErrors.TIMEOUT:
        handleTimeout();
        break;
      case JitsiTrackErrors.SCREENSHARING_USER_CANCELED:
        // User canceled - no action needed
        break;
      default:
        handleGenericError(error);
    }
    
    throw error;
  }
}

​
Error Categories

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getUserMedia Errors (gum.*)

Errors that occur when requesting media devices:
  • CONSTRAINT_FAILED
  • GENERAL
  • NOT_FOUND
  • PERMISSION_DENIED
  • TIMEOUT
  • UNSUPPORTED_RESOLUTION

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Screen Sharing Errors

Errors specific to screen/desktop sharing:
  • SCREENSHARING_GENERIC_ERROR
  • SCREENSHARING_NOT_SUPPORTED_ERROR
  • SCREENSHARING_USER_CANCELED
  • ELECTRON_DESKTOP_PICKER_ERROR
  • ELECTRON_DESKTOP_PICKER_NOT_FOUND

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Track Management Errors (track.*)

Errors related to track lifecycle and state:
  • TRACK_IS_DISPOSED
  • TRACK_NO_STREAM_FOUND
  • TRACK_NO_STREAM_TRACKS_FOUND
  • TRACK_TOO_MANY_TRACKS_IN_STREAM

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See Also

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