rpicam-tui 0.1.0

Interactive Textual TUI for building and running rpicam-still/rpicam-vid commands

rpicam-tui

An interactive terminal UI for building and running rpicam-still / rpicam-vid commands on the Raspberry Pi Camera Module 3, without hand-typing long CLI invocations every time.

This is a guided wrapper around the real CLI, not an abstraction that hides it. Every control in the settings form is labeled with the actual flag it maps to (--awb, --autofocus-mode, ...), and the command preview pane always shows the exact command that will run. Runs are executed with asyncio.create_subprocess_exec against the real rpicam-still/rpicam-vid binaries — argv in, argv out, no picamera2 abstraction layer in between.

Layout

• Left pane — the settings form, grouped into collapsible sections (common/capture, autofocus, exposure, white balance/color, still-specific, video-specific).
• Top-right pane — a live, syntax-highlighted preview of the exact command that will run.
• Bottom-right pane — tabs for streamed process output and run history. Select a history row to reload its settings back into the form.

Running on the Pi

Dependencies are managed with uv:

curl -LsSf https://astral.sh/uv/install.sh | sh   # if uv isn't installed yet
uv sync
uv run python -m rpicam_tui
# or: uv run rpicam-tui

uv sync creates a .venv and installs exactly what's pinned in uv.lock. rpicam-still/rpicam-vid must be on PATH (they ship with rpicam-apps on Raspberry Pi OS with a Camera Module 3 attached).

Developing off-Pi (dry-run mode)

The app runs fine on a laptop with no camera attached:

• If rpicam-still/rpicam-vid isn't found on PATH, the runner automatically falls back to logging the command instead of executing it — you'll see a warning notification on startup and a note in the command preview.
• You can also force this at any time with Ctrl+D (toggle dry-run), or by launching with uv run rpicam-tui --dry-run.
• In dry-run, "running" a capture just prints [dry-run] would run: ... to the output log and records a (fake, zero-duration) entry in run history, so the whole picking-settings → preview → run → history loop is exercisable without hardware.

Keybindings

Key	Action
Ctrl+R	Run capture
Ctrl+X	Cancel running capture (SIGINT)
Ctrl+T	Toggle still/video mode
Ctrl+S	Save current settings as a preset
Ctrl+L	Load a preset
Ctrl+Y	Copy the current command to clipboard
Ctrl+D	Toggle dry-run mode
Ctrl+Q	Quit (cancels any running capture)

Presets

Presets are JSON snapshots of the full settings form, stored at ~/.rpicam_tui/presets/*.json. A few are seeded on first run (copied from rpicam_tui/presets/ in the package):

• default-still — general-purpose full-resolution still capture.
• default-video — general-purpose 1080p30 video capture.
• vehicle-mount — manual focus at ~10m (--lens-position 0.1), a fast --shutter 8000 to fight rolling-shutter blur from vibration, and a higher --bitrate 10000000.

Run history

Every run (including dry runs) is appended to ~/.rpicam_tui/history.json with its timestamp, full command, exit code, duration, and output path. Selecting a row in the History tab reloads that run's settings back into the form so you can tweak and rerun.

Project layout

rpicam_tui/
  command_builder.py   # pure Settings -> argv logic, unit-testable, no I/O
  runner.py            # async subprocess execution + cancellation
  field_specs.py        # declarative form schema (flags, help text, groups)
  presets.py            # preset save/load
  history.py            # run history persistence
  widgets.py             # reusable Textual form/preview widgets
  app.py                 # the Textual App tying it all together
  presets/                # seed preset JSON files
tests/
  test_command_builder.py
run.py                    # `python3 run.py` / `uv run python run.py` convenience entry point
pyproject.toml             # uv/PEP 621 project + dependency metadata
uv.lock                     # pinned dependency versions

Tests

uv sync                # installs the `dev` dependency group (pytest) too
uv run pytest

command_builder.py has no Textual or subprocess dependency, so its tests run instantly and cover the argv-building logic directly.