If you have installed the codec but are still experiencing issues:
The most crucial step is to download the correct codec for your device's processor type. Using the wrong version will cause the "Can't find custom codec" error. Mx Player Pro Codec Armv8 Neon
"MX Player Pro Codec Armv8 Neon" 是一个专门为64位现代Android设备（基于ARMv8架构）打造的自定义编解码器。它通过利用设备的NEON多媒体处理引擎，为用户解决了新版MX Player Pro无法播放AC3、DTS等格式音频的难题。 If you have installed the codec but are
Only use this if you have MX Player Pro 1.7.x to 1.18.x installed. Mx Player Pro Codec Armv8 Neon