The fix for a segfault that never shipped
Summary
This is a detailed technical case study from Recall.ai about diagnosing and fixing a rare segfault in the legacy VisualOn vo-aacenc AAC encoder used in their media pipeline. It covers core-dump analysis, stack traces, and the root cause in fixed-point math, then documents a pragmatic fix to prevent negative energy calculations and discusses upgrading to a modern encoder. It also highlights how an upstream bug that was never released contributed to the decision to migrate away from the old encoder.