Package org.mp4parser.boxes.microsoft.contentprotection

Class GenericHeader

java.lang.Object
org.mp4parser.boxes.microsoft.ProtectionSpecificHeader
org.mp4parser.boxes.microsoft.contentprotection.GenericHeader
public class GenericHeader extends ProtectionSpecificHeader
Specifications > Microsoft PlayReady Format Specification > 2. PlayReady Media Format > 2.7. ASF GUIDs

ASF_Protection_System_Identifier_Object 9A04F079-9840-4286-AB92E65BE0885F95

ASF_Content_Protection_System_Microsoft_PlayReady F4637010-03C3-42CD-B932B48ADF3A6A54

ASF_StreamType_PlayReady_Encrypted_Command_Media 8683973A-6639-463A-ABD764F1CE3EEAE0

Specifications > Microsoft PlayReady Format Specification > 2. PlayReady Media Format > 2.5. Data Objects > 2.5.1. Payload TrackExtension for AES in Counter Mode

The sample Id is used as the IV in CTR mode. Block offset, starting at 0 and incremented by 1 after every 16 bytes, from the beginning of the sample is used as the Counter.

The sample ID for each sample (media object) is stored as an ASF payload extension system with the ID of ASF_Payload_Extension_Encryption_SampleID = {6698B84E-0AFA-4330-AEB2-1C0A98D7A44D}. The payload extension can be stored as a fixed size extension of 8 bytes.

The sample ID is always stored in big-endian byte order.