The Video Recognition Gateway (VIRGO) command line tool has a simple logger built in. You enable logging by executing the following command in a shell:
> virgo service log <log specification>where the log specification is a space-separated list of log predicates. A log predicate looks like this:
level/tag
level/tag[feedName]The first variant sets the log level for the package tag to level on a global basis. Consequently this log predicate applies to the VIRGO daemon and all feeds it spawns. The second variant allows you to apply the log predicate to a single feed with the name feedName. If you specify both a global- and a feed-specific log level for a tag then the level with higher priority is applied.
Note: The VIRGO daemon does not keep a log history. Log information is only generated and retained while you are actively running a virgo service log command.
Examples:
Enable DEBUG-level logging for the ‘tracking' package in all feeds:
> virgo service log D/trackingEnable DEBUG-level logging for the ‘capture' and the ‘cop-http' packages in all feeds:
> virgo service log D/capture D/cop-httpEnable DEBUG-level logging for the ‘tracking' package in the feed ‘foo': (This does not change the current log configuration for any other feed.)
> virgo service log D/tracking[foo]The following log levels are supported:
| Level | Description |
|---|---|
| V | Verbose |
| D | Debug |
| I | Info |
| W | Warn |
| E | Error |
| O | Off |
The order in terms of verbosity, from least to most verbose is OFF, ERROR, WARN, INFO, DEBUG, and VERBOSE.
The following log packages are supported:
| Package | Supports feed name? | Description |
|---|---|---|
| detection | yes | Object detector related messages |
| recognition | yes | Face recognizer related messages |
| tracking | yes | Object tracker messages |
| capture | yes | Image capture related messages |
| events | yes | Event reporting related messages |
| pose-liveness | yes | Pose Liveness Action Recognizer related messages |
| feed | yes | Feed life cycle related messages |
| cop-http | no | COP over HTTP related messages |
| config | no | Virgod configuration management related messages |
| updates | no | Virgod update initiation mechanism related messages |