BIDS export (events.tsv + sidecar)

SMACC can convert a session log into a BIDS events file — a tab-separated events.tsv plus a JSON sidecar describing its columns. Export one from the Analyzer with its Export events (BIDS)… button. Only event-marker lines (" - portcode N") become rows.

events.tsv

Tab-separated, one header row plus one row per marker:

onset   duration    trial_type  value
5.5 n/a Lights off  47
1810.25 n/a REM detected    41

Column	Type	Meaning
onset	seconds	Time from the first parseable log line (the onset origin).
duration	seconds or n/a	n/a for instantaneous markers (all SMACC markers are instantaneous).
trial_type	string	The event label, exactly as logged.
value	integer	The event’s port code (1–255).

JSON sidecar

Written alongside as <name>.json, describing each column. value points back to the log’s event_codes block for the full code-to-event map of that session:

{
  "onset": {
    "Description": "Event onset relative to the first log entry.",
    "Units": "second"
  },
  "duration": {
    "Description": "Event duration; 'n/a' for instantaneous markers.",
    "Units": "second"
  },
  "trial_type": {
    "Description": "Event label as logged by SMACC."
  },
  "value": {
    "Description": "SMACC event-marker port code. The full code-to-event map for the session is recorded in its .log settings block (under event_codes)."
  }
}