Question: In the 3GPP File Format, how is CVO (Coordination of Video Orientation) data stored when associated with a specific video track?
Option 1: As an extension to the video codec configuration in the 'avcC' box.
Option 2: Within a timed metadata track using the CVOSampleEntry box, referencing the video track via the 'cdsc' track reference.
Option 3: Embedded directly within the video frames as supplementary data.
Option 4: Stored in a standalone CVO data box without direct reference to the associated video track.
Explanation: This is correct because, according to the specifications for storing CVO data in the 3GPP File Format, it must be stored in a timed metadata track. The CVOSampleEntry box is specifically used for this purpose, indicating that each sample of metadata is a single byte of CVO data. Additionally, using the 'cdsc' track reference ensures that the metadata track is properly linked to the video track it describes, maintaining organizational integrity within the file format. This approach facilitates efficient and clear association between the CVO data and its corresponding video content.