* feat: support batch video upscaling with folder upload and directory save
- Add multi-file selection and entire folder upload (webkitdirectory)
- Support drag & drop of both files and folders via FileSystemEntry API
- Add save directory picker using File System Access API (showDirectoryPicker)
- Process videos sequentially with per-file progress and status tracking
- Add right-side result list with click-to-compare functionality
- Add per-video duration and total batch duration display
- Add retry button for failed items with error detail display
- Remove auto-play on comparison viewer load
- Fix worker error handling: handle "error" command to reject stale promises
- Fix event listener accumulation in video comparison (AbortController)
- Fix XSS risk by escaping HTML in all innerHTML injections
- Fix URL revocation timing in download to prevent large file truncation
- Extract writeToSaveDirectory and truncateName helpers to reduce duplication
- Add Usage Guide panel explaining single/multiple/folder upload options
Files changed:
docs/upscaler/index.html (+1110/-181)
docs/upscaler/upscaler.js (+110)
* fix: prevent auto-play and resource consumption during upscaling
- Set preload="metadata" on preview and comparison video elements
- Explicitly pause preview video after setting src in showVideoPreview
- Remove preview video seek sync from batch processing progress callbacks
(was causing continuous decode during upscaling, wasting GPU resources)
- Remove preview video seek sync from retry progress callback
- All videos now require manual play; no background resource usage
* fix: improve upscaled video quality with higher bitrate and codec support
- Raise base bitrate from 2.5 Mbps (25e5) to 8 Mbps (8e6) for standard and
firefox processors, preventing quality loss when source videos have high
bitrates (e.g. 720p @ 16.7 Mbps was producing 1440p @ 10 Mbps, smaller
than the original file)
- Double the bitrate for mediabunny processor (X.n1 * 2) to account for the
4x pixel increase from 2x upscaling
- Add H.264 Level 5.1 (avc1.640033) and Level 5.2 (avc1.640034) codecs to
the fallback lists, since Level 4.0 (avc1.640028, ~24.6 Mbps) cannot
support the higher bitrates for 1440p+ outputs
- Add latencyMode: "quality" to VideoEncoder configs for both standard and
firefox processors, prioritizing encoding quality over latency (suitable
for offline processing)
* feat: add video data comparison panel for original vs upscaled metrics
- Add a comparison data table below the file info bar showing 6 metrics:
Resolution, File Size, Duration, Est. Bitrate, Pixels, Process Time
- Display per-metric change percentage with color-coded indicators:
green (↑) for improvements, red (↓) for regressions, gray for neutral
- Estimated bitrate calculated from file size × 8 / video duration
- Table renders after both original and upscaled video metadata loads
- Auto-hide panel on reset
* fix: make video data comparison panel full-width and responsive
- Move comparison data table from inside the left column to the full-width
area below the left/right layout, so it is no longer constrained by the
comparison viewer column width
- Remove table-fixed colgroup and overflow-x-auto that caused horizontal
scrolling on smaller screens
- Table now uses w-full auto-layout, displaying all 4 columns (Metric,
Original, Upscaled, Change) without requiring horizontal scrolling
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Co-authored-by: rionzhao <rionzhao@tencent.com>
Harvey Zhao