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feat: make media inspection progressive

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Albrecht Degering
2026-07-27 18:25:47 +02:00
parent 6c68f9bfbd
commit f2c0fc12d2
32 changed files with 2169 additions and 462 deletions
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docs/PERFORMANCE.md
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@@ -80,11 +80,15 @@ frames meet the threshold. The documented ffmpeg.wasm input ceiling is 2 GiB,
but real limits can be substantially lower on mobile or memory-constrained
browsers.
Source inspection has a bounded, size-aware watchdog: 30 seconds for small
files, a two-MiB-per-second scan budget for larger files, and a five-minute
ceiling. Recognized local audio/video can begin browser playback from its
temporary object URL while that worker inspection continues; completed probe
metadata remains authoritative for editing and export.
Import does not start FFmpeg. Recognized local audio/video can begin browser
playback from its temporary object URL while a native media element reads
lightweight duration/dimensions. Detailed FFprobe inspection starts only when
requested or required for an export and has a bounded, size-aware watchdog:
30 seconds for small files, a two-MiB-per-second budget for larger files, and a
five-minute ceiling. A detailed-inspection timeout is nonfatal; browser
playback and basic file information remain available. Completed probe metadata
remains authoritative for stream mapping, remux safety, chapters, tags,
subtitles/attachments and export validation.
Lowering resolution, duration, frame rate, passes and output count reduces
work. MT can be faster but consumes more memory/CPU and requires isolation; ST