Every query on Frames filters on EventId and orders or ranges by FrameId,
and nothing needs a frame by Id. The Id primary key was a clustered index
nothing read, and EventId_FrameId_idx was a secondary index every query
used. On a copy of a local table that secondary index was half the
table's size. With (EventId, FrameId) as the primary key the index is
gone, and an event's rows are stored together, so deleting an event is a
range delete.
zm_update-1.39.36.sql:
- converts AI_Detections.FrameId from Frames.Id to the per-event frame
number, drops its foreign key to Frames and indexes (EventId, FrameId).
A composite foreign key cannot replace it: ON DELETE SET NULL would
have to null the NOT NULL EventId, and Frames rows are written in
batches, so a detection can be recorded before its frame row.
- removes duplicate (EventId, FrameId) rows, keeping the earliest.
- rebuilds Frames with the new primary key.
- removes ON UPDATE CURRENT_TIMESTAMP from Frames.TimeStamp. Any UPDATE
of a frame row was overwriting its capture time.
Each step checks the current schema first, so the migration can be
re-run.
REST API: view, edit and delete take /frames/<action>/<EventId>/<FrameId>.json.
The old single-Id URLs return 404. CakePHP 2 has no composite keys, so
the model's primaryKey is EventId. That keeps Event's dependent cascade
delete limited to the event's own frames. The controller writes with
explicit (EventId, FrameId) conditions instead of save(), which would
match rows on EventId alone. Edit no longer changes EventId or FrameId.
view=image with fid but no eid used to look up Frames.Id. It now returns
404.
The Perl Frame class is identified by (EventId, FrameId).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
zm_update-1.39.31.sql gave monitors audio detection, but the level only ever
existed in shared memory, so it was gone the moment the frame passed and there
was nothing for the event view to plot. Add Frames.AudioLevel next to Score, on
the same 0-100 dBFS-derived scale the threshold uses.
What is stored is the peak since the previous row, not the level at the instant
the row was written. Frames rows are written well below the capture rate --
only alarm, bulk and score-increasing frames get one -- so sampling at write
time would drop exactly the short loud noises worth seeing on a timeline.
AudioDetector accumulates the peak as it decodes and Event::AddFrame takes it
where the row is built, which clears it so each row covers its own interval.
The Event constructor takes and discards it once, otherwise an event's first
row reports the loudest moment since the previous event ended.
This needs no shared memory change: zma is now an offline re-analysis tool and
the live analysis runs in a thread of zmc, alongside the capture thread that
runs the decoder, so the peak can stay in the AudioDetector. SharedData keeps
its documented 888-byte layout and its fixed offsets.
The frames ajax returns the column, and Score with it. elements in
web/ajax/status.php is a whitelist that never listed Score, which is why the
event view's cue strip has been reading an undefined Score off every frame.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JpiSWBmtQkR5bcgpHWY4ME
