| Value | Meaning |
|---|---|
| FbTypeInvalid0 | Invalid type |
| RtpfbTypeNack1 | Generic NACK |
| RtpfbTypeTmmbr3 | Temporary Maximum Media Stream Bit Rate Request |
| RtpfbTypeTmmbn4 | Temporary Maximum Media Stream Bit Rate Notification |
| RtpfbTypeRtcpSrReq5 | Request an SR packet for early synchronization |
| RtpfbTypeTwcc15 | |
| PsfbTypePli1 | Picture Loss Indication |
| PsfbTypeSli2 | Slice Loss Indication |
| PsfbTypeRpsi3 | Reference Picture Selection Indication |
| PsfbTypeAfb15 | Application layer Feedback |
| PsfbTypeFir4 | Full Intra Request Command |
| PsfbTypeTstr5 | Temporal-Spatial Trade-off Request |
| PsfbTypeTstn6 | Temporal-Spatial Trade-off Notification |
| PsfbTypeVbcn7 | Video Back Channel Message |
Different types of feedback messages.