Initialization data for protected tracks

For protected CMAF tracks, the initialization data (carried in the catalog initDataList array (as defined in Section 3.1) MUST include the Protection Scheme Information Box ('sinf') containing the Scheme Type Box ('schm') and Scheme Information Box ('schi') with the Track Encryption Box ('tenc') as specified in [CENC] Section 6. This enables the subscriber to determine the encryption parameters (default_isProtected, default_Per_Sample_IV_Size, default_KID) from the initialization segment.