spike on testing a bunch of files from the MPEG file format set#97
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bradh wants to merge 16 commits intokixelated:mainfrom
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spike on testing a bunch of files from the MPEG file format set#97bradh wants to merge 16 commits intokixelated:mainfrom
bradh wants to merge 16 commits intokixelated:mainfrom
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This is required in HEIF image sequences (i.e. a track with `pict` as the handler), per ISO/IEC 23008-12.
nmhd is the null media header box, and is used for metadata and text tracks (14496-12, Sections 8.4.5.2, 12.3.2 and 12.5.2 sthd is the subtitle header box (14496-12, Section 12.6.2) These boxes are very similar, and the test changes would affect both.
This is from ISO/IEC 23008-12:2025 Section 7.4. Its used in HEIF image sequences. This fixes the parsing of the several of the old HEIF samples in the MPEG File Format Conformance suite. Without this change, we get OverDecode errors for `sgpd`.
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There are a few that don't work yet,
tx3g,stsz,mfra,ssixbeing the candidate missing boxes.