Recordings longer than ~10 minutes silently fail to save (#616). The
renderer buffers the whole WebM as a Blob[], then on stop makes several
in-memory copies (fixWebmDuration -> arrayBuffer -> Buffer.from) before
writing. A long 1080p recording duplicates hundreds of MB several times
in the renderer, exceeds Electron's memory limit, and the renderer
crashes silently with no file saved.
Two changes:
1. Stream chunks to disk (originally @Amanuel2x's contribution in #617).
Open an fs.WriteStream in the main process at recording start and send
each ~1s ondataavailable chunk straight to disk over two new IPC calls
(open-recording-stream, append-recording-chunk), so the renderer never
holds more than a single chunk. A full in-memory fallback is preserved
for environments where the IPC stream cannot open.
2. Patch the WebM Duration header on disk after the stream closes. Browser
MediaRecorder writes WebM with no Duration element, so streamed files
save with duration=N/A and the editor's seek bar, timeline, and any
scrub/trim break. A new electron/recording/webm-duration.ts module
rewrites the Duration element, writing to a temp file and renaming in
place so a crash mid-write cannot corrupt the recording.
Streaming is opt-in: the screen recorder and the browser-only webcam
recorder stream to disk; native-capture webcam sidecars (Windows, macOS)
keep buffering in-memory, since their finalize path reads the recorder
blob directly to attach the webcam track.
Verified: tsc --noEmit clean; biome clean; vitest 166/166.
Closes#616
Supersedes #617
Co-Authored-By: Amanuel <amanuel@localboostnetworking.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Record browser webcam sidecar when native Windows capture is active.
Add native webcam sidecar output and DirectShow NV12/YUY2 fallback.
Sample exported webcam frames by source timestamp.
- Add nativeCursorClipRef div (outside preserve-3d) with CSS inset() clip-path that
tracks the camera-transformed video boundary, including border-radius
- Add cameraAwareMaskRect() in FrameRenderer that computes the same boundary for
Canvas 2D clip in the export path; remove stage-clamping so rounded corners match
the preview's inset() behavior when zoom/pan pushes the mask off-stage
- Cache maskBorderRadius in LayoutCache so both shadow and direct composite paths
can apply camera-aware rounded clipping
- Fix double mask.x offset introduced by nativeCursorMaskRef; replace mask div with
clip-path on the outer wrapper
- Normalize cursor size relative to maskRect.width so preview and export scale match
- Clip cursor to canvas boundary and hide on non-recorded display
- Wire cursorClipToBounds flag through FrameRenderConfig and VideoExporter
- Implement native bridge for Windows cursor capture via PowerShell/C#
- Add cursor-free capture using getDisplayMedia with setDisplayMediaRequestHandler
- Update video player and exporters to support native cursor telemetry
- Enable system audio capture on Windows via WASAPI loopback
- Add interpolation for smoother cursor movement in playback and export
- Improve cursor scaling and visibility handling in editor and playback
Adds a Radix UI slider below the zoom preset buttons allowing any scale
between 1.0x and 5.0x. When the slider value matches a preset exactly,
that preset button also shows as active.
- Add `customScale?: number` to `ZoomRegion` and `getZoomScale()` helper
that returns customScale when set, falling back to ZOOM_DEPTH_SCALES[depth]
- Overlay indicator, playback renderer, and frame exporter all use
getZoomScale() so preview, playback, and export are consistent
- Fix focus clamping in zoomRegionUtils and frameRenderer to use actual
scale instead of depth-based preset scale, preventing zoom drift with
custom values
- Fix drag boundary in VideoPlayback to use clampFocusToScale with the
actual scale so the full canvas is clickable at high custom zoom levels
- Timeline item label shows custom scale value when set
- Slider styled dark with green thumb/fill when a custom (non-preset) value is active
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds a new 'No Webcam' option to the webcam layout preset dropdown in the editor. When selected, the webcam feed is completely hidden from both the preview and the exported video, allowing users who recorded with a webcam to exclude it from the final output.
- Add 'no-webcam' to WebcamLayoutPreset type union and preset map
- Handle 'no-webcam' in computeCompositeLayout (returns webcamRect: null)
- Add 'no-webcam' case in project persistence normalization
- Add 'No Webcam' option to the layout preset dropdown in SettingsPanel
- Add 'noWebcam' i18n translation key (en)
neurot1cal