1c8cc1c409
The prewarm's single big read (a ~14 min sequential pass over a 60GB remux to demux subtitles) shares the same disk/NFS as live streaming. Lower the prewarm ffmpeg processes to the Linux IDLE I/O class (ioprio_set) so that background read yields bandwidth to a user who's actually watching — the prewarm slows down under contention instead of starving playback, and runs full speed when the disk is idle. Applied only to the prewarm-only extractors (ExtractSubtitlesVTTMulti, ExtractThumbnailJPEG) via Start → setIdleIOPriority(pid) → Wait; the on-demand /sub + /thumbnail handlers keep normal priority (a user is waiting on those). Linux-only syscall behind a build tag; a no-op stub elsewhere. Best-effort — errors ignored, never required for correctness. Verified: the prewarm ffmpeg shows 'idle' under ionice -p; on-demand stays normal.
6 lines
154 B
Go
6 lines
154 B
Go
//go:build !linux
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package mediainfo
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// setIdleIOPriority is a no-op on non-Linux platforms (ioprio is Linux-specific).
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func setIdleIOPriority(_ int) {}
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