Question: What is the primary purpose of using the 'resv' generic sample entry in the ISO base media file format for stereoscopic 3D video in a 3GP file?
Option 1: To encrypt the media for content protection
Option 2: To indicate the use of Multiview Video Coding (MVC) streams
Option 3: To signal the profile and codec parameters for H.264/AVC
Option 4: To ensure a UE renders the 3D video correctly by restricting decoding to capable devices
Explanation: The 'resv' generic sample entry restricts video playback, ensuring only devices capable of correctly rendering stereoscopic 3D video can decode and display the content without artifacts, safeguarding against improper rendering on incapable UEs.