Optionalinput: unknownNumber of distinct technical-info fields.
Number of distinct tag fields.
Case-insensitive info-name lookup; returns -1 when absent.
Get the name of the technical info field at the given zero-based index.
Get the value of the technical info field at the given zero-based index.
Case-insensitive tag-name lookup; returns -1 when absent.
Get the name of the meta tag at the given zero-based index.
Read the valueIndex-th value of meta field index.
Number of distinct values stored under MetaName(index).
FbFileInfo— meta + technical-info accessor.Wraps the JSON envelope returned by
metadata.readso SMP-style scripts can useMetaCount/MetaFind(name)/MetaValue(...)to inspect tags, andInfoCount/InfoFind(name)/InfoValue(idx)for technical info (codec / sample rate / etc.).Lookups are case-insensitive to match the SMP runtime behaviour.