Invalid type
Application layer Feedback
Full Intra Request Command
Picture Loss Indication
Reference Picture Selection Indication
Slice Loss Indication
Temporal-Spatial Trade-off Notification
Temporal-Spatial Trade-off Request
Video Back Channel Message
Generic NACK
Request an SR packet for early synchronization
Temporary Maximum Media Stream Bit Rate Notification
Temporary Maximum Media Stream Bit Rate Request
Different types of feedback messages.