The Convert to Frames dialog is accessible from the OgreMax menu:

This dialog is used to convert video files to image files that can be used as animation frames within a Texture Unit.

Note that this conversion will only work correctly for video files that are supported by 3DS Max.

• Source File - The video file to be converted to frames.
• Destination Directory - The directory in which the converted frames are placed.
• Destination Base File Name - The base file name used to name the frame files.
• Size - The dimensions of the converted frames.