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implement aux info types registration #357

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Merged
podborski merged 1 commit into from
May 12, 2026
+25 −2
Merged

implement aux info types registration #357

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8 changes: 8 additions & 0 deletions data/aux-info-types.csv
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
code,description,specification
cbc1,AES-CBC encryption sample auxiliary information,CENC
cbcs,AES-CBC subsample pattern encryption sample auxiliary information,CENC
cenc,AES-CTR encryption sample auxiliary information,CENC
cens,AES-CTR subsample pattern encryption sample auxiliary information,CENC
stai,TAI timestamp sample auxiliary information,UNCV
suid,Universally unique content identifier per sample auxiliary information,NGA.STND.0076
sve1,Content sensitive encryption sample auxiliary information,CENC
4 changes: 2 additions & 2 deletions scripts/PRsanitycheck.py
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Original file line number Diff line number Diff line change
Expand Up @@ -122,8 +122,8 @@ def duplicatecodes(codes, exceptions=[]):
if dupssorted[i][0] not in warned:
warned.add(dupssorted[i][0])
print(
"ERROR: '%s' is duplicated in: '%s'" % dupssorted[i][0],
dupssorted[i][3],
"ERROR: '%s' is duplicated in: '%s'" % (dupssorted[i][0],
dupssorted[i][3]),
)
dupsame.append([dupssorted[i][0]])
if dupsame != []:
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15 changes: 15 additions & 0 deletions src/app/(rest)/registered-types/aux-info-types/page.mdx
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import { DataDisplay } from "@/components";

export const metadata = {
title: "Auxiliary Information Types"
};

# Auxiliary information types

Sample auxiliary information provides per-sample metadata that is stored alongside media samples in an ISO base media file format track. The type of auxiliary information is identified by a four-character code (`aux_info_type`) carried in the `SampleAuxiliaryInformationSizesBox` ('saiz') and `SampleAuxiliaryInformationOffsetBox` ('saio'), as defined in ISO/IEC 14496-12.

The `aux_info_type` determines the format of the auxiliary data. When omitted, its value defaults to the protection scheme type (for encrypted tracks) or the sample entry type. A track may carry multiple streams of auxiliary information distinguished by different `aux_info_type` and `aux_info_type_parameter` values.

## Registered auxiliary information types

<DataDisplay csv="aux-info-types" />
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