Skip to main content
The Log panel displays timestamped text log messages from your recording. It renders output from ROS logging topics such as /rosout and other diagnostic streams, providing insight into system behavior, warnings, and errors alongside the sensor data.

​
Supported Data

​
Auto-Detection

A topic is assigned to the Log panel when:
  • Its schema is a recognized ROS log message type, or
  • Its topic name contains log or /rosout (note the leading slash)

​
Features

​
Severity Levels

Log messages include a severity level that indicates the importance of the message. The Log panel color-codes messages by severity for quick visual scanning.

​
Severity Filtering

Filter the log view to show only messages at or above a specific severity level. This helps you focus on important messages in recordings that produce large volumes of debug output.
Show every log message regardless of severity. Useful for detailed debugging when you need the full context.

​
Timestamp Correlation

Every log message includes a timestamp that corresponds to the shared timeline used by all panels. This enables direct correlation between log events and sensor data:
  • Click a log entry to seek the entire viewer to that message’s timestamp. Camera images, point clouds, and plots all update to show the state at the moment the log was emitted.
  • Current time indicator highlights log messages near the current playback position, so you can see what the system was logging at any point in the recording.

​
Scrolling Behavior

​
Common Use Cases

Error investigation

Filter for errors and correlate log timestamps with sensor data to understand what was happening when a failure occurred.

System health monitoring

Review warning and info messages to assess overall system behavior during the recording.

Sensor diagnostics

Check for sensor driver warnings, timeout messages, or data quality alerts that may affect annotation.

Debugging timing issues

Use log timestamps to identify timing problems, such as delayed sensor initialization or dropped messages.

When investigating a specific event, click the log entry’s timestamp to seek all panels to that moment. This is the fastest way to correlate log output with what the cameras and LiDAR were seeing.