When the High Quality QuickTime Image (DV25 Only) option is enabled in the Operation Preferences page, Pro Tools decompresses both fields of each interlaced frame of QuickTime video. When viewing a QuickTime movie in the Pro Tools Video window, select this option to display the movie at the highest possible resolution. For interlaced video that was transcoded from a progressive source, enabling option provides a crisper image in the Pro Tools Video window. For true interlaced video, enabling this option provides a smoother and clearer image when viewing the video on a client monitor.
Deselecting this option can help improve performance if your system experiences problems playing back a session with QuickTime video (such as comb-like interlacing artifacts or flickering video when monitoring using an Avid Mojo SDI).