vangel76andClaude Opus 5.5 3b1fa29663 #790: Matroska AAC / MP3 / AC-3 trims the exact CodecDelay ...

Problem: ffmpeg stores the encoder priming as CodecDelay in ns (1024 AAC
samples at 48 kHz = 21.333 ms, 256 AC-3 samples at 44.1 kHz = 5.805 ms)
and block timestamps in ms. The demuxer subtracts the delay rounded to
1 ms, and fixed-length packets were anchored on that rounded stamp, so
the whole track played up to 16 samples late against ffmpeg's decode.
Only Opus undid the rounding.

Fix: one stamp-to-samples conversion for every Matroska audio codec
that undoes the demuxer's rounding and removes the exact CodecDelay
(rounded to the nearest sample; the element holds whole ns), with
checked math against hostile timebases.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-10 23:59:15 +02:00

..

adr

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brand

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images

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agents.md

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architecture.md

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codec-parity.md

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contributing.md

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contributors.md

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file-format-parity.md

#790: Matroska AAC / MP3 / AC-3 trims the exact CodecDelay

2026-10-10 23:59:15 +02:00

gaps.md

#790: Matroska AAC / MP3 / AC-3 trims the exact CodecDelay

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monitors.md

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performance.md

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project-files.md

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releasing.md

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roadmap.md

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target-app-parity.md

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testing.md

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transcripts.md

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ui-parity.md

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