Player Armv8 Neon Codec Extra Quality - Mx

Ensure you downloaded the 64-bit version (ARMv8) and not the 32-bit version (ARMv7). Installing the wrong architecture codec is the most common error. If your phone is modern (2020 or newer), you almost certainly need the 64-bit/ARMv8 version.

Due to licensing issues starting from version 1.7.32, MX Player removed native support for certain Dolby and DTS formats. Mx Player Armv8 Neon Codec