For advanced users, the "AI" (All-In-One) codec pack contains literally hundreds of decoders, including FFmpeg with GPL-licensed components. This fixes 99% of "missing audio" errors, including Opus, FLAC, and TrueHD.
To fix it permanently:
The most common misconception is that the MX Player developers are lazy. They are not. The issue is , not technical. mx player codec missing
"I have tried to use my default set of tools (codecs) to decode this video stream, but I don't recognize the format, or my default tools are incompatible with your device's processor." For advanced users, the "AI" (All-In-One) codec pack
Global Summit. All rights reserved. © 2026