DEM (file format)
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For the purpose of this, I will be referring to each collection of events as a frame. This may or may not add up to the number of frames given by the header.
Demo Header
| Type | Field | Value |
|---|---|---|
| String | Header | 7+NULL characters, should be "HL2DEMO" |
| Int | Demo Protocol | Demo protocol version, should be '3' |
| Int | Network Protocol | Network protocl version number |
| String | Server name | 260 characters long |
| String | Client name | 260 characters long |
| String | Map name | 260 characters long |
| String | Game directory | 260 characters long |
| Float | Playback time | The length of the demo, in seconds |
| Int | Ticks | The number of ticks in the demo |
| Int | Frames | The number of frames in the demo |
| Int | Sign on length | ? |
Frame
Each frame begins with 0 or more of these commands: These are described in hl2sdk\utils\demoinfo\demoformat.h
| Type | Value |
|---|---|
| dem_signon | 1 |
| dem_packet | 2 |
| dem_synctick | 3 |
| dem_consolecmd | 4 |
| dem_usercmd | 5 |
| dem_datatables | 6 |
| dem_stop | 7 |
| dem_lastcommand | dem_stop |