Question: What is a requirement for storing Multiview Video Coding (MVC) in a 3GP file to ensure compatibility with H.264 (AVC) file readers?
Option 1: At least one track must use the sample entry type 'avc1'.
Option 2: All tracks must utilize the MVC file format exclusively.
Option 3: The 3GP file must contain a dedicated MVC compatibility layer.
Option 4: H.264 (AVC) and MVC tracks must be stored in separate 3GP files.
Explanation: To maintain compatibility with existing H.264 (AVC) file readers, incorporating at least one track with the 'avc1' sample entry type is necessary when storing Multiview Video Coding (MVC) content within a 3GP file. This approach ensures that devices or software capable of reading H.264 (AVC) can also access and play back the MVC content to some extent, even if they don't fully support MVC.