kawaandClaude Opus 5
a6ec6c980a
Two halves of one pass; TODO-FIXES.md lists every finding. The audit fixed, among ~90 items: MP4 export dead-ending and locking the UI behind a stuck "Downloading..." button; height keyframes storing the width; shadow defaults and keyframes storing undefined because fabric's get() is not a path getter; every letter animation writing to the last letter; keyframe times drifting on each drag because data-time was layer-relative on expanded rows; O(n^2 log n) playback, now indexed once per frame; and a save() that rebuilt the record canvas on every edit, now debounced. Exports also lost audio-layer sound outright: MediaRecorder records only the first audio track, so every source now mixes through one AudioContext into one destination. The new half is src/js/render.js, an offline renderer. Real-time capture was the root cause of dropped frames on heavy scenes and smeared video layers: a bare currentTime assignment is async, so drawing straight after it captures the previous frame. Each frame is now seeked, awaited on 'seeked', drawn, and pushed through a VideoEncoder; audio is mixed in one OfflineAudioContext pass and encoded to Opus. webm-writer2.js gained a second Opus track and lost three bugs, including a MAX_CLUSTER_DURATION_MSEC of ~58 days that overflowed the signed 16-bit block timecode past ~32s. Real-time capture remains the fallback: the hand-rolled muxer's output is decoded in a <video> element before being handed over, and any failure returns null so record() falls back transparently. test/webm-muxer.test.js parses the muxer output with an EBML reader in plain Node. It caught the fixed-256-byte header overflow that inspection missed. Not verified in a browser: node --check passes on every script and the muxer test passes, but a running Chrome held the Playwright profile lock, so the manual pass listed at the end of TODO-FIXES.md is still outstanding. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Motionity
This is a fork of the original project aiming to fix issues and add features.
Running it
npm run vendor # downloads the third-party libraries into src/vendor/
npm start # http://127.0.0.1:8080
Three packaged distributions are available — desktop (Windows .exe, Linux
AppImage and Flatpak), a Docker image, and a bare-metal install. Build
instructions for all of them are in PACKAGING.md.
npm run dev # desktop app from source
npm run dist:win # Windows installer + portable exe
npm run dist:linux # AppImage + Flatpak
npm run docker:build # container image
Releasing
./scripts/build-release.ps1 # installers + SHA256SUMS.txt in dist/
./scripts/publish.ps1 -PublishRelease # + image push and Gitea release upload
build-release.ps1 needs no credentials. publish.ps1 needs a Gitea token with
package read/write (image push) and write:repository (release upload), read
from $env:GITEA_TOKEN or prompted for. -BinariesOnly -NoBinaryBuild retries a
failed upload without rebuilding.
One rule applies to every target: browsers expose WebCodecs (the fast exporter)
and IndexedDB (project saving) only in a secure context. http://localhost
qualifies; a plain-HTTP LAN address does not. Serve it over TLS anywhere else.