1. Dev: aurp format specification - Smertig/among-us-replay-mod GitHub Wiki

Basic types

Type	Description	Example
`u8` `u16` `u32` `u64`	N-bit unsigned value with little-endian binary representation	`u8`: `00` → `0` `u16`: `12 34` → `0x3412` (`13330`) `u32`: `01 00 00 00` → `1`
`bool`	Same as `u8`, but contains only `01` (`true`) or `00` (`false`)	`00` → `false` `01` → `true`
`float`	IEEE-754 single precision floating point number with little-endian binary representation	`00 00 80 3F` → `1.0` `66 66 9A C1` → `-19.3`
`Type[N]`	Array of `N` elements of type `Type`, same as `Type`, `Type`, ..., `Type` (`N` times)	`u8[5]`: `01 02 03 04 05`
`string`	`utf-8` encoded string: > `u32 length` > `u8 data[length]`	`03 00 00 00 46 6F 6F`: > `length` = `3` > `data` = `46 6F 6F` → `"Foo"`

Aurp format

Field	Type	Description	Binary example	Value example
signature	`u8[4]`	Signature of `aurp` format	`44 55 52 50`	`"AURP"`
version	`u32`	Version of `aurp` format (currently only `3`)	`03 00 00 00`	`3`
timestamp	`u64`	File creation timestamp (unix-time)	`BF 5D 83 5F 00 00 00 00`	10/11/2020 19:32:15
mod_version	`string`	Version of mod used to capture this replay	`05 00 00 00 30 2E 35 2E 31`	`"0.5.1"`
game_version	`string`	Game version	`09 00 00 00 32 30 32 30 2E 39 2E 32 32`	`"2020.9.22"`
map_id	`u32`	Map ID (`0` - Skeld, `1` - Mira, `2` - Polus)	`02 00 00 00`	`2` (Polus)
player_count	`u32`	Number of players	`06 00 00 00`	`6` players
players	`Player[player_count]`	Array of players	...	...
events	`Event[]`	Array of captured events (till EOF)	...	...

Player

Field	Type	Description	Binary example	Value example
id	`u8`	Player ID	`05`	`5`
name	`string`	Player name	`03 00 00 00 61 62 63`	`"abc"`
color_id	`u8`	Color ID	`0A`	`10` (cyan)
hat_id	`u32`	Hat ID	`05 00 00 00`	`CAPTAIN_HAT`
pet_id	`u32`	Pet ID	`03 00 00 00`	`DOG`
skin_id	`u32`	Skin ID	`04 00 00 00`	`MILITARY`
is_impostor	`bool`	Is player an impostor	`01`	`true`

Event

Field	Type	Description	Binary example	Value example
type	`u8`	Event type. One of the following: `0` → `frame data`	`00`	`0` → `frame data`
dt	`u32`	Event timestamp in milliseconds since round start	`94 43 00 00`	`17300` → `17.3 sec`
event_data	`?`	Event details. Type of this field depends on `type` value: `0 (frame data)` → `FrameData`	...	...

FrameData

Field	Type	Description	Binary example	Value example
is_complete	`bool`	See player_states below	`01`	`true`
state_count	`u8`	Number of `PlayerState` stored in this frame	`05`	`5`
player_states	`PlayerState[state_count]`	Depending on value of `is_complete`: `false` → only players with changed state since last `FrameData` event `true` → state of all active players	...	...

PlayerState

Field	Type	Description	Binary example	Value example
id	`u8`	Player ID	`01`	`1`
position	`float[2]`	Player position (`x`, `y`)	`74 60 7C 41 CD 37 53 C0`	`15.77, -3.3`
velocity	`float[2]`	Player velocity (`x`, `y`)	`D1 DE D0 37 00 00 F0 BF`	`0.000024, -1.875`
is_dead	`bool`	Is player dead	`00`	`false`
is_disconnected	`bool`	Is player disconnected	`01`	`true`
task_count	`u8`	Number of player tasks	`05`	`5`
tasks	`TaskState[task_count]`	Player tasks state	...	...

TaskState

Field	Type	Description	Binary example	Value example
is_complete	`bool`	Is task complete	`01`	`true`
type_id	`u8`	Task type ID	`01`	`PRIME_SHIELDS`
id	`u32`	Task specific ID (depends on current map)	`05 00 00 00`	`Medbay: Inspect Sample` (Skeld) `Electrical: Divert Power to Cafeteria` (Mira HQ) `Office: Download Data` (Polus)

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