6.3.0 — Release Notes
Changelog for Agnes Video Generator: new features, improvements and bug fixes for every release.
What's New
Features & Improvements
- Complete v6 optimization roadmap (29/29 items) — every batch of the v6 roadmap is now shipped:
- Performance (batch 2): the final compositing chain is now ffmpeg-based — identical-parameter scene concatenation uses
-c copy, audio alignment/volume/silence-padding merge into a single filter pass, and subtitles render through the ASS path with per-entry styles (AGNES_SUBTITLE_ASS, with automatic fallback to the moviepy path). Poetry videos compose all scenes in one pass instead of re-encoding per scene. A dedicated encoding thread pool isolates heavy ffmpeg/moviepy work from API requests, and the token-bucket rate limiter gained a native async path so stopping a task during rate-limit waits is instant. - Reliability & engineering (batch 1): task state follows a single-writer principle with per-task locking, resume supports persisted word-level TTS cues (no re-synthesis on resume), video polling is adaptive and multi-scene waits run concurrently, task listing is indexed with
limit/offset/statuspagination, stale artifacts/error logs are governed, and the frontend stops polling in background tabs with exponential backoff and a connection-loss banner. - Frontend & i18n: translations are split into per-language lazy-loaded chunks — the first-screen JS bundle drops from ~721 kB to ~305 kB (gzip 226 kB → 97 kB, -58%). Form submission/confirm/toast flows were unified into shared composables, mobile layout, focus-trap modals,
prefers-reduced-motionand form drafts were added. - Observability & ops (batch 3): new
GET /api/healthandGET /api/metricsendpoints, optional rotating file logging (AGNES_LOG_FILE), and a DockerHEALTHCHECK. Runtime settings are now converged through typedpydantic-settings(with.envsupport) so concurrency limits scale dynamically with API-key count. - Immediate defect fixes (batch 0): stop now cancels instantly without retry backoff, event-loop blocking (watermark re-encode, sync downloads) is moved off the loop, multi-key delete works correctly, a frontend
v-htmlXSS vector is closed, and image generation got a duplicate-submit guard. - Full 22-language support incl. Arabic — the UI already had 22 languages; this release completes the voice catalog for all of them. Arabic UI is fully supported (PR #32), and 8 UI languages (Turkish, Vietnamese, Thai, Tagalog, Hindi, Persian, Bengali, Urdu) now have edge_tts voice groupings with native-voice name display, script-detection regexes (Thai/Devanagari/Bengali) and per-script subtitle font fallback (new bundled Noto fonts; Persian/Urdu reuse the Arabic reshape+bidi pipeline).
- Transparent analytics disclosure & privacy controls — the settings panel now shows a clear, collapsible privacy card listing exactly what usage statistics are reported (and what is never uploaded: prompts, manuscripts, poems, API keys and reference images are redacted before reporting). Analytics can be turned off entirely from the panel.
- Complete error tracebacks in the feedback report — pipeline failures now persist the full
tracebackinto the task state; the diagnostics endpoint and the in-app feedback report include it, so you can paste complete error details (e.g. environment-level[WinError 2]) into GitHub issues without checking the server console.
Refactoring & Optimizations
- ffmpeg-first compositing chain — the final assembly path for creative/manuscript/anchor/poetry videos was reworked from 3-4 full re-encodes into copy-concat + a single filter pass (with graceful fallback to the previous moviepy path). This is the largest performance win in the v6 line, cutting final-assembly time by roughly 3-10x on typical outputs.
- Asynchronous rate limiting with dedicated encoding thread pool — the token bucket now offers a native async acquire path (stop-aware), and heavy encoding runs on a dedicated executor so long encoding jobs no longer starve the request path.
Bug Fixes
- Fixed stopping behavior — cancelling a task no longer triggers retry backoff (up to ~2 minutes) and no longer deletes a resumable
video_id. - Fixed multi-Key configuration — key IDs are now hashed from the actual key so deleting one Key from multiple configured Keys removes exactly that Key.
- Fixed event-loop freezes — watermark re-encoding and synchronous downloads no longer block the whole service; a semaphore release bug that could permanently break the concurrency cap under low-rate-limit configurations is fixed.
- Fixed frontend issues — a stored-XSS vector via unescaped
v-htmlis closed, duplicate image-submit without guard is prevented, and fetch errors now surface readable backend messages instead of silent failures. - No configuration changes are required. Existing tasks remain resumable; task state files are unchanged in format.
About Agnes Video Generator
A completely free, open-source AI video generator: turn text into multi-scene AI videos with narration and subtitles.
- Free and open source — no payment, no high-end GPU required
- Text-to-video, image-to-video, digital anchor and image generation
- Powered by free Agnes AI models, rendered entirely in the cloud
- Runs via Web UI, Docker or npm, and supports self-hosting
Related Pages
Release Notes
Changelog for Agnes Video Generator: new features, improvements and bug fixes for every release.
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Why you can trust this
Written by a practicing developer and cross-checked against authoritative primary sources such as arXiv papers, vendor technical reports, and the Stanford AI Index.
SandGrid@lcy362
Author of Agnes Video Generator · Full-stack Developer
Independent developer and author of Agnes Video Generator, an open-source (MIT) AI video generation tool built on Agnes AI's free video models. Has helped 1,000+ creators produce AI videos at zero cost. Focused on making video generation models accessible and production-ready; content is based on hands-on practice and primary research.
View on GitHubLast updated：2026-08-21
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