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alehelandClaude Opus 5.5
650d1996be
The Limits entry from 79f5839 said what goes wrong but not why it is left.
It now says that such a file is outside the MP4 specification: an MP4 AAC
sample is one raw access unit with the configuration in the sample
description (ISO/IEC 14496-14, 14496-3), so ADTS headers do not belong in
it, and a sample's duration is the time it decodes to (ISO/IEC 14496-12).
It says why files within the specification are not affected, what still
works, and why seeks and edits in such files are not corrected: finding
where each sample's audio starts means counting the ADTS frames in every
sample before it, one read per sample, which would slow every ADTS-framed
MP4 at open to work around files outside the specification.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>