Watching the video play turns out to be much faster than scanning a
thumbnail grid. The coarse 10-min thumbnail grid still does rough
localisation; after picking, a video player launches at coarse_t-30s
paused with frame-accurate scrubbing controls. The analyst reads the
exact opening time off the player's OSD and types it into the
terminal prompt (default = the coarse pick, so a single Enter keeps
the coarse pick if the player is hard to use).
Backend auto-detects mpv > vlc > ffplay; gracefully degrades to "use
the coarse pick" if no player is installed.
New `bad_rois` column captures non-opening sub-arenas (partial-opening
videos like the 2024-10-21 set where only the lower half opens). The
prompt validates entries are integers in 1..6.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Giorgio Gilestro
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