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Bound ffmpeg filter threads

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Victor Kuznetsov
2026-07-31 14:43:01 -07:00
parent 166dab9d03
commit 0fac8cd000
3 changed files with 9 additions and 4 deletions
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docs/module-internals.md
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@@ -149,10 +149,11 @@ regeneration. It centralizes container codecs, optional audio stream copying,
metadata/chapter policy, encode-failure reporting, and atomic same-directory
publication. Each mapped stream is allowed to reach its own end, so a copied
audio tail is not shortened to the frame-input duration.
Both the raw-BGR and timestamped-NUT stdin modes cap the video encoder at two
threads. A Linux full-clip trace showed ffmpeg creating dozens of worker stacks
and severely delaying frame-pipe ingestion on a constrained hosted runner. The
bounded codec pool avoids that scheduling collapse while leaving audio stream
Both the raw-BGR and timestamped-NUT stdin modes run the implicit pixel-format
filter graph on one thread and cap the video encoder at two threads. A Linux
full-clip trace showed ffmpeg creating an oversized execution pool and severely
delaying frame-pipe ingestion on a constrained hosted runner. The bounded
filter and codec pools avoid that scheduling collapse while leaving audio stream
copy independent. Command regressions cover both supported video codecs; the
real Linux full-clip CI job guards process completion.
`probe_video_encode_profile` reads the first source video stream with ffprobe