Input Formats	Windows	Linux	OSX
iyuv/i420, yv12 and yuv9 avi, mjpg avi, mpng avi, wav, jpg, png, bmp	x	x	x
Other avi files (depending on installed codecs)	x
mpg (audio may not work for mpg files) aif, snd, ico, cur, gif	x
pnm, pbm, pgm, ppm, xpm, xbm	x	x

There are two steps to importing a file.  The first is selecting the file and the second is bringing it (or a selection of it) into the project. 

To select a file, either use the file tab at the top, visible when the program starts up, or use the browse button, located at the bottom left.  If the file is ZS4 readable, it should appear in the import tab.  If the file has audio and has not previously been imported, it may take a few minutes to draw the audio wave form.

In the import panel you can preview video and audio using the playback controls below the waveform display. 
To select only one section of a video or audio file to add to the project, either draw the area with the mouse, or use the start/end selection buttons located to the left of the playback controls.  These buttons allow precision when viewing the audio tab, as one can zoom in to find the appropriate location to set the in and out points, and when using the video tab, as the video may be covering the position indicator.
Note that the import tab is the only panel which allows the playback of a video file, so any precision trim procedure must occur before importing the clip into the project.  In the track arrangement area, clips can only be lengthened and shortened.

Also note the dig buttons to the right of the play controls.  The dig button (single heart) can be used to save one or more selections (digs) for future use.  These will still be available the next time the file is loaded into ZS4.  Use the next dig button (multiple hearts) to navigate between digs.

To import the file or selection into the project, drag the green arrow into the track display or the treeview. Dragging a track onto another track makes it a child track of that track. 
All tracks are descendents of the MediaMixer which is the main project track, but all tracks can have unlimited descendents.   This allows for an easy and powerful way of making subarrangements.  For an example, see the sub-mixer tutorial.

For video or audio files which have an audio sample rate of something other than 48khz, you may consider converting the audio prior to import into ZS4 to avoid possible quality loss.  See this article for conversion methods.

MMImport_Dig toggle add2proj button sa_startsel button sa_endsel button MMImport_NextDig button MMImport_PlayPause toggle MMImport_Stop toggle MMImport_av_video toggle MMImport_av_audio toggle

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Upsampling Audio Rate in Video Files