The Armv8 Neon codec is a specific implementation of the Armv8 Neon instruction set, optimized for video decoding and encoding. Mx Player Pro uses this codec to take advantage of the improved performance and efficiency offered by Armv8 Neon.
Many MKV or AVI files use proprietary audio codecs like AC3 or DTS. Stock Android players often cannot play audio for these files. The custom codec pack adds support for these formats 1. 3. Battery Efficiency Mx Player Pro Codec Armv8 Neon
ARMv8 is the 64-bit instruction set architecture used in most modern Android smartphones and tablets (devices with processors like Snapdragon 800+ series, high-end MediaTek chips, etc.). The Armv8 Neon codec is a specific implementation