          """ Mux Audio """
          _input_opts = Effmpeg._common_ffmpeg_args[:]
          _ref_vid_opts = None
          _output_opts = '-y -c copy -map 0:0 -map 1:1 -shortest'
          if preview:
              raise ValueError("Preview with audio muxing is not supported.")
          # if not preview:
          #    _output_opts = '-y ' + _output_opts
          _inputs = OrderedDict([(input_.path, _input_opts), (ref_vid.path, _ref_vid_opts)])
          _outputs = {output.path: _output_opts}
          Effmpeg.__run_ffmpeg(exe=exe, inputs=_inputs, outputs=_outputs)
  
      @staticmethod
 
</s> remove             if preview:
                raise ValueError("Preview for gen-vid with audio muxing is "
                                 "not supported.")
 </s> add  </s> remove                   preview=None, exe=None, **kwargs):
 </s> add                   exe=None, **kwargs): </s> remove         _output_opts = _fps_arg
        if not preview:
            _output_opts = '-y ' + _output_opts + ' -c:v libx264'
 </s> add         _output_opts = '-y ' + _fps_arg + ' -c:v libx264' </s> remove         _output_opts = '-vf scale="' + str(scale) + '"'
        if not preview:
            _output_opts = '-y ' + _output_opts
 </s> add         _output_opts = '-y -vf scale="' + str(scale) + '"' </s> remove         if not preview:
            _output_opts = '-y ' + _output_opts + "-vcodec copy -acodec copy"
 </s> add 
          """ Mux Audio """
          _input_opts = Effmpeg._common_ffmpeg_args[:]
          _ref_vid_opts = None
          _output_opts = '-y -c copy -map 0:0 -map 1:1 -shortest'




          _inputs = OrderedDict([(input_.path, _input_opts), (ref_vid.path, _ref_vid_opts)])
          _outputs = {output.path: _output_opts}
          Effmpeg.__run_ffmpeg(exe=exe, inputs=_inputs, outputs=_outputs)
  
      @staticmethod
keep keep keep keep replace replace replace replace keep keep keep keep keep
 Bugfixes and minor updates:
  - Remove preview option from effmpeg tool
  - Remove json filetypes from GUI for alignments files
  - Capture and raise empty timelapse folder errors
  - Move convert to use centralized ImagesLoader 
tools/effmpeg/effmpeg.py