Ensure you haven't unzipped the file if you are using the automatic detection method; MX Player typically prefers the raw ZIP file. However, if it still fails, some users report success by unzipping the folder first and then selecting the .so file manually.
Navigate to the folder where you downloaded the codec (usually the "Download" folder). mx player custom codec 149 0 armv8 neon work
For users on newer versions of MX Player (like 1.87 or above), you may eventually need to upgrade to a newer codec build, but version 1.49.0 remains a reliable legacy fix for many devices. Ensure you haven't unzipped the file if you
Guide to Installing MX Player Custom Codec 1.49.0 for ARMV8 NEON if it still fails