FT_AUDIOVIDEOBROWSER reads and vizualizes the audio and/or video data
 corresponding to the EEG/MEG data that is passed into this function.

 Use as
 or as
   ft_audiovideobrowser(cfg, data)
 where the input data is the result from FT_PREPROCESSING or from FT_COMPONENTANALYSIS.

 The configuration structure can contain the following options
   cfg.datahdr     = header structure of the EEG/MEG data, see FT_READ_HEADER
   cfg.audiohdr    = header structure of the audio data, see FT_READ_HEADER
   cfg.videohdr    = header structure of the video data, see FT_READ_HEADER
   cfg.audiofile   = string with the filename
   cfg.videofile   = string with the filename
   cfg.trl         = Nx3 matrix, see FT_DEFINETRIAL
   cfg.anonimize   = [x1 x2 y1 y2], range in pixels for placing a bar over the eyes (default = [])
   cfg.interactive = 'yes' or 'no' (default = 'yes')

 If you do NOT specify cfg.datahdr, the header must be present in the input data.
 If you do NOT specify cfg.audiohdr, the header will be read from the audio file.
 If you do NOT specify cfg.videohdr, the header will be read from the video file.
 If you do NOT specify cfg.trl, the input data should contain a sampleinfo field.