You can create custom CSV files with any columns you need. Columns must be separated by commas. Numbers must use a dot as the decimal point and no separator for thousands.

The first row contains the headers and requires at least utc (ms) (unix time in milliseconds) OR date (date-time text formatted as YYYY-MM-DDTHH:mm:ss.sssZ) OR time (ms) (video time in milliseconds) OR time (s) (video time in seconds) OR timecode (video time as HH:mm:ss.sss).

Some columns and groups of columns are supported and will allow dedicated gauges. Headers of these columns must be named exactly as highlighted (some variations of units may be ok, but this is not guaranteed).

Some GPS quality columns are also supported for dynamically filtering out bad GPS data: satellites (nubmer of gps satellites), gps dop (dillution of precision), and gps fix (type of GPS fix: a number from 0 to 3)

You can force a column to be interpreted as text by using (text) as units in the header. This can be useful to preserve a certain number formatting.

Telemetry Overlay supports most video formats and dozens of embedded and external data formats.

Gauges can be customized to a great extent, but presets and defaults can make the user experience extremely easy.

Map and satellite imagery is available for representing GPS data.

Export formats for both professional and social use are available.

Lots of documentation, tutorials and an active community help achieve great results.

CSV files from Telemetry Extractor v2.0 and newer are also well supported. CSV files from previous versions of Telemetry Extractor may need manual tweaking.

Each header should contain the name of the stream and the units (if available). For example power (W).

• GPS: lat (deg), lon (deg), alt (m) (optional), speed (m/s) (optional)
• Orientation: heading (deg), pitch angle (deg), bank (deg)
• Accelerometer: accel x (m/s²), accel y (m/s²), accel z (m/s²)
• Gyroscope: gyro x (deg/s), gyro y (deg/s), gyro z (deg/s)
• gear
• engine (rpm)
• Airspeed: ias (kn), tas (kn)
• vertical speed (ft/min)
• Altimeter: barometric altitude (ft), msl altitude (ft), barometer setting (inHg)
• Turn Coordinator: turn rate (deg/s), slip skid
• Thumbsticks: rc throttle, rc rudder, rc elevator, rc aileron

Other columns will be read as either numeric values (for Custom gauges) or text values (for the Dynamic Text gauge). Text columns should not contain commas.

Third-party tools may create or convert data files from multiple sources to this format. For example, PZracing converter does this for PRR motorsports racing logs.