Three recurring issues on every full scan:
1. Video playlist scans re-enqueued every file only to reject it as
AlreadyExists. Pre-filter in ScanDirectoryMessage and QueueVideosMessage
so we skip videos whose .m3u8 already exists, and demote the leaked
AlreadyExists log to debug.
2. image crate was built with only jpeg/png features, so webp/tiff/avif
files logged "format not supported" every scan. Enable those features.
3. RAW (ARW/NEF/CR2/...) and HEIC thumbnails weren't generated, so the
scan kept retrying them. Try the file's embedded JPEG preview via
kamadak-exif first (fast, pure-Rust, works on Sony ARW where ffmpeg's
TIFF decoder fails). Fall back to ffmpeg for HEIC/HEIF and RAWs with
no preview. Anything still undecodable gets a <thumb>.unsupported
sentinel so future scans skip it.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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