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libfreemkv 0.31.5: do not force monotonic block timestamps on video

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B-frame video PTS is legitimately non-monotonic in decode/storage order; the
audio-oriented monotonic nudge was clobbering it to prev+1ms, which decoders
flagged as non-monotonic DTS (thousands per title). Apply the nudge to
audio/subtitle only; video keeps its true PES PTS. + regression test.
This commit is contained in:
Matthew Jackson
2026-06-08 09:00:35 -07:00
parent f79c2a0aa9
commit 41a6d89cd1
3 changed files with 88 additions and 7 deletions
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CHANGELOG.md
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# Changelog
## 0.31.5 (2026-06-08)
### Fixed
- MKV mux: stop forcing strictly-monotonic block timestamps on the **video**
track. The monotonic nudge (added for audio PES that collide on a
millisecond) was clobbering B-frame video PTS — which are legitimately
non-monotonic in decode/storage order — to prev+1ms. A `copy` remux
preserved the wrong value, but decoding derived DTS from the HEVC POC and
found them colliding, emitting thousands of "non monotonically increasing
dts" warnings per title. Video now keeps its true PES PTS (Matroska
SimpleBlock permits non-monotonic block timestamps); audio/subtitle tracks
still get the nudge. Verified: a re-mux drops the warning count to zero.
## 0.31.4 (2026-06-08)
Test cleanup — no runtime changes. Removed 144 unit tests flagged in adversarial