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ippStsAacWinGrpErr
Eight-short-sequence frames group short windows before scalefactors and sections are decoded. The grouping controls how scalefactor bands are traversed.
An invalid group count or grouping pattern makes section and spectral decoding ambiguous. Verify the group lengths before investigating later coefficient errors.
Useful checks for ippStsAacWinGrpErr
- Whether the window sequence is actually eight-short-sequence.
- The window-group lengths derived from the grouping bits.
- The resulting number of scalefactor-band groups.
For ippStsAacWinGrpErr, Intel IPP Error Reporting · FFmpeg AAC decoder source · FFmpeg ADTS header parser
Interpreting ippStsAacWinGrpErr
ippStsAacWinGrpErr is Intel IPP status -145. AllStat describes it as “AAC: Invalid number of groups for current window length.”. For ippStsAacWinGrpErr, the decisive context is the exact IPP routine and overload, because status names are shared across image, signal, codec, cryptography, and data-compression domains with different parameter contracts.
Developer checks for ippStsAacWinGrpErr
- Record the full function name, library version and CPU dispatch, source and destination types, ROI or vector length, step values, scale factor, and every state/specification object passed to the call.
- Validate the ippstsaacwingrperr parameter group before changing buffers: initialization routines often establish constraints inherited by later processing calls.
- For ippStsAacWinGrpErr, use ippGetStatusString for logging but branch on the numeric IppStatus value; localized or wrapper text is not a stable program contract.
Retrying ippStsAacWinGrpErr with unchanged arguments normally reproduces the same validation failure. For ippStsAacWinGrpErr, rebuild the affected IPP state when configuration changed, verify buffer bounds and alignment, and isolate the smallest call that still returns the status.
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