AV1CodecConfigurationBox (av1C) must match the Sequence Header OBU
Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 25/100
Research direction
Start with the AVIF container parsing path and the handling of the AV1CodecConfigurationBox (av1C), then read the AVIF and AV1 Codec ISO Media File Format requirements linked in the issue. Determine whether matching against the Sequence Header OBU belongs in this library or consumer code; done requires a decided enforcement boundary and corresponding validation coverage.
Written by the indexing model from the issue text.
Description
The AV1CodecConfigurationBox av1C (defined in AV1 Codec ISO Media File Format Binding § 2.3.2) contains decoder configuration information. This information is also present in the Sequence Header OBU in the AV1 Image Item Data. Since it is advantageous to be able to access this information by parsing the AVIF container without decoding the AV1 Image Item Data, it is duplicated at the container level. Both of these values must match, or else the interpretation of the file would be ambiguous.
This requirement is based on § 2.2.1 of the AVIF Specification.
Since this library currently only handles AVIF container parsing and not AV1 Image Item Data decoding, enforcement of this requirement may occur in the consumer code (see https://bugzilla.mozilla.org/show_bug.cgi?id=1701430).
- Dominant language
- Rust
- Stars
- 448
- Forks
- 72
- Avg merge
- 20d 3h
- Merged PRs (30d)
- 1
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