For those of you who have experienced problems previewing with DVDshrink, there is a simple workaround. This works on all versions of 3.1.x
If, when you start up DVDshrink and attempt to preview a title by clicking the play button in the lower left hand preview screen nothing happens, do the following;
Go to EDIT, select PREFERENCES and then click the PREVIEW tab. Change the "video renderer" from "System Default Renderer" to "VMR-9" and click OK
Treat this as toggle switch, meaning if the value is already set at "VMR-9" then change it to "System Default Renderer" or vice-versa.
Now your Preview function should work nicely.
If, when you start up DVDshrink and attempt to preview a title by clicking the play button in the lower left hand preview screen nothing happens, do the following;
Go to EDIT, select PREFERENCES and then click the PREVIEW tab. Change the "video renderer" from "System Default Renderer" to "VMR-9" and click OK
Treat this as toggle switch, meaning if the value is already set at "VMR-9" then change it to "System Default Renderer" or vice-versa.
Now your Preview function should work nicely.