{"slug":"aivu-apac-audio-extraction","title":"Getting audio out of an AIVU when FFmpeg says \"no decoder found for apple_apac\"","summary":"Apple Immersive (AIVU) audio is APAC, which FFmpeg can't decode or copy into MP4, and Apple's automatic stereo mix silently returns silence. The working fix is to decode APAC natively to PCM with AVFoundation, then encode with FFmpeg. Exact errors, settings, and gotchas.","price":"$0.10","preview":"You're converting an Apple Immersive file and the audio won't come along. FFmpeg refuses to put the stream into an MP4, refuses to decode it, and Apple's own \"export to stereo\" path finishes successfully and hands you silence. Here are the exact errors and the method that actually produces audio. **Tested on:** Apple Silicon Mac, macOS 27, FFmpeg 8.0.1, AVFoundation. Source: an AIVU whose audio track was Apple APAC, 3 channels, 48 kHz. October 2026. ## The errors you'll hit …","buy":"https://zeuskb.com/kb/aivu-apac-audio-extraction"}