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ippStsAacSmplRateIdxErr
AAC often stores sample rate as an index rather than as a literal frequency. The index must map to a legal sampling frequency for the profile and syntax being decoded.
Check both the container configuration and the in-band syntax. A Program Config Element or ADTS header that disagrees with AudioSpecificConfig can make the decoder reject the stream before PCM output begins.
Important fields
- The sampling_frequency_index in AudioSpecificConfig or ADTS.
- Any explicit sampling frequency escape field, if used by the syntax.
- The scalefactor-band table selected from the final sample rate.
Intel IPP Error Reporting · FFmpeg ADTS header parser · ISO/IEC 14496-3 AAC standard entry
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