Sample file is here https://trac.ffmpeg.org/raw-attachment/ticket/10207/6%20channel%20conversion%20problem%20example.mp4 If you extract raw aac (ADTS) out of mp4 same thing happens. So on Android it says the 3 channels are in the bottom layer. <img width="598" height="321" alt="Image" src="https://github.com/user-attachments/assets/8afea277-d2a5-46fc-87c9-e9e2b455453e" /> <img width="1440" height="3120" alt="Image" src="https://github.com/user-attachments/assets/d5e093bf-6ead-4f80-9950-74c26abab5a0" />
Sample file is here https://trac.ffmpeg.org/raw-attachment/ticket/10207/6%20channel%20conversion%20problem%20example.mp4
If you extract raw aac (ADTS) out of mp4 same thing happens. So on Android it says the 3 channels are in the bottom layer.