| Value | Meaning |
|---|---|
| OneByte1 | The one byte rtp extension header. 1-16 data bytes per extension with a maximum of 14 extension ids in total. |
| TwoByte2 | The two byte rtp extension header. 256 data bytes per extension with a maximum of 255 (or 256 including appbits) extensions in total. |
Flags that apply to a RTP Audio/Video header extension.