3.5 KiB
Control protocol & MCP
Desktop control channel
filmcraft --control 9876 (or FILMCRAFT_CONTROL_PORT) listens on 127.0.0.1:<port> (loopback only).
One JSON request per line → one JSON reply per line:
{"id": 1, "method": "engine.execute", "params": {"command": "sequence.addEdit", "params": {"seconds": 3}}}
{"id": 1, "ok": true, "result": {"cuts": 2}}
Methods (handlers in crates/ui-egui/src/control.rs):
| Method | Params | |
|---|---|---|
engine.execute / ui.menu.invoke |
{command, params} |
any engine or UI command id |
engine.commands / ui.menu.list |
– | command registry / menu tree |
ui.inspect |
– | UI state (tool, workspace, dock, timeline view, playback, fps…) |
ui.elements |
{prefix?} |
every on-screen interactive element: id, label, rect |
ui.set |
{tool, workspace, mode, theme, focused, playbackRes, timeline:{pps,scroll,fit}} |
|
ui.panel.show / ui.panel.close |
{panel} |
|
ui.click / ui.move |
{id} or {x,y}, button, count, modifiers |
synthetic pointer input |
ui.drag |
{from, to, steps, modifiers} |
press–move–release |
ui.scroll |
`{id | x,y, dx, dy, modifiers}` |
ui.key / ui.type |
{key} (Cmd+K, Space…) / {text} |
keyboard |
ui.timeline.hit / ui.timeline.locate |
{x,y} / {clip, edge?} |
timeline hit-testing |
ui.playback |
`{action: play | stop |
ui.screenshot |
{path?, panel?} |
PNG of the window or one panel |
ui.resize, ui.focus, app.quit |
Element ids are stable, e.g. timeline.clip.<id>, timeline.track.V1.lock, tools.Razor,
project.item.<id>, effects.item.gaussian_blur, panel.tab.Timeline, program.transport.playback.toggle.
Project files, auto-save, crash recovery and preferences commands (file.recover, prefs.set, …) and their
automation ids are listed in project-files.md.
Trim mode (crates/engine/src/trim.rs): trim.selectEditPoint / trim.selectNearest enter trim
mode (the Program monitor becomes the Trim Monitor, ids trimMonitor.*); trim.monitor returns what
it shows. Dynamic trimming takes an explicit clock (seconds) so it is deterministic: trim.shuttle {direction, slow?, clock} (J/L), trim.tick {clock}, trim.shuttleStop {clock?} (K, one undo step),
trim.cancelDynamic (Esc), trim.playAround {clock, loop?} (Space / Shift+K).
Keyboard shortcuts (crates/engine/src/shortcuts.rs): shortcuts.list {query?, panel?},
shortcuts.get, shortcuts.set {command, keys, panel?, add?, keepConflicts?}, shortcuts.clear,
shortcuts.undo / shortcuts.redo, shortcuts.conflicts {platform?}, shortcuts.forKey {key},
shortcuts.resolve {keys, panel?}, shortcuts.presets, shortcuts.loadPreset / savePreset /
deletePreset {name}, shortcuts.export / import {path}, shortcuts.audit. Keys use Cmd (⌘ /
Ctrl), Ctrl (macOS ⌃), Alt, Shift. The dialog (Edit ▸ Keyboard Shortcuts…, ⌥⌘K) uses ids
shortcuts.* (shortcuts.key.K, shortcuts.cell.<command>, shortcuts.ok, …).
MCP
filmcraft-cli mcp serves MCP on stdio: headless (in-process session; --demo / --project p.fcproj)
or --bridge 127.0.0.1:9876 to drive the running app. Tools: command_list, command_run,
project_inspect, sequence_inspect, media_import, render_frame, ui_inspect, ui_elements,
ui_click, ui_drag, ui_key, ui_type, ui_screenshot, ui_control. .mcp.json registers both.
Time is in ticks (254 016 000 000 per second); commands also accept seconds, frame or timecode.