Why Won't My Video Play in MX Player?

It's frustrating when a video refuses to play. The good news is that most MX Player playback failures have straightforward fixes. This guide covers the most common causes and exactly how to resolve each one.

Problem 1: "Can't Play This Video" Error

This is the most common error and usually points to a decoder incompatibility. Try these fixes in order:

  1. Switch the decoder: While the video is open, tap the three-dot menu > Decoder. If you're on HW, switch to SW (software). If on SW, try HW+.
  2. Install the custom codec: Go to MX Player's page on the Play Store. Search for "MX Player Codec" and install the version matching your device's CPU architecture (ARM, ARM64, or x86).
  3. Update MX Player: An outdated version may lack support for newer formats. Check the Play Store for updates.

Problem 2: Video Plays But There's No Audio

If the video plays but you hear nothing:

  • Check that your device isn't muted and the in-app volume is up.
  • Tap the audio icon during playback to confirm the correct audio track is selected.
  • Switch to SW (Software) decoder — some audio formats like AC3/DTS only work in software mode.
  • For DTS or Dolby audio, you may need to install an additional MX Player codec that supports those formats.

Problem 3: Choppy or Stuttering Playback

Stuttering is usually a hardware decoding or performance issue:

  • Switch from SW to HW or HW+ decoder to offload work from the CPU.
  • Lower the playback quality if streaming online content.
  • Close background apps to free up RAM.
  • For 4K HEVC files, ensure your device supports hardware HEVC decoding — older devices may not.

Problem 4: MX Player Keeps Crashing

If the app crashes repeatedly:

  1. Go to your device's Settings > Apps > MX Player > Storage and tap Clear Cache.
  2. If that doesn't help, tap Clear Data (note: this resets your app settings).
  3. Uninstall and reinstall the app from the Play Store.
  4. Check if the crash happens only with specific files — those files may be corrupt or partially downloaded.

Problem 5: Subtitles Not Showing

If your subtitles aren't appearing:

  • Make sure the subtitle file is in the same folder as the video and has the exact same filename (e.g., movie.mp4 and movie.srt).
  • Tap the subtitle (T) icon during playback and manually browse to the subtitle file.
  • Check that subtitles are enabled — tap the subtitle icon and make sure it isn't set to "None."
  • If subtitles are garbled, change the text encoding: tap the subtitle icon > Settings > Text Encoding.

Problem 6: App Won't Open / Stuck on Loading Screen

A stuck loading screen is almost always solved by:

  1. Force-stopping the app (Settings > Apps > MX Player > Force Stop).
  2. Clearing the app cache.
  3. Restarting your device.
  4. Checking for a pending system or app update.

Still Having Issues?

If none of the above resolves your problem, try playing the same file in another app (like VLC) to determine whether the issue is with the file itself or MX Player specifically. You can also check MX Player's official support forum for device-specific solutions.