Download the codec file. It will usually be in a .zip format or a direct .so file. Save it in a place you can easily find, such as your device's folder. Do not extract the zip file unless the guide specifically tells you to. Step 2: Open MX Player Launch the MX Player app on your Android device. Step 3: Navigate to Settings
Where to Find the MX Player 1.13.0 ARMV7 Neon Codec Download Link
You can look at the "Releases" or tags section to find older zip files tailored for the 1.13.0 player version.
If it doesn't auto-detect, manually navigate to the folder where you downloaded the file and select it. Step 5: Restart the App