frames property
The directory of numbered frames recorded on the way to this step — what the transition looked like, where the events say what it did. Relative like image; null on every run that did not record, which is every CLI run and every run older than the capture.
The frames are in format, at frameWidth×frameHeight — their own size, not the step's: a recording runs at half scale and the shot beside it does not.
Implementation
final String? frames;