: In many cases, MX Player will automatically detect the new codec file upon startup and ask if you want to use it as a custom codec. Tap OK . Manual Selection (if not auto-detected): Tap the Menu (three lines or dots) > Settings . Navigate to Decoder . Scroll to the bottom and tap Custom codec .
Generally, no. Modern Android versions and modern processors (ARMv8) do not require this specific 32-bit NEON codec. If you have a new phone, simply updating the MX Player app from the Play Store solves 99% of playback issues. mx player 1130 armv7 neon codec download link