Input format smpte-timecode

Question

Whats the best way to set the input format when using smpte-timecode?

<Input 
                  placeholder="In"
                  autoFocus={true}
                  onChange={e => this.onChange(e)} 
                  type="time"
                  step="00.01" 
                  pattern="^(?:(?:([01]?\d|2[0-3]):)?([0-5]?\d):)?([0-5]?\d)$"
                  style={{fontSize: "16px", width: "100%"}}/>
              )}
onChange = (element, frameRate) => {
    const { form } = this.props;
    const keys = form.getFieldValue('keys');

    keys.forEach(function (value) {
      var inTc = Timecode(form.getFieldValue('1-in'), 25); // errors
      console.log(inTc.toString());
    });

This keeps resulting in the following Error: Timecode string expected as HH:MM:SS:FF or HH:MM:SS;FF