How to replace codecs on Xiaomi devices: from TVs to smartphones

Why Xiaomi doesn’t play files and how to fix it

You downloaded a high-resolution movie, but the Xiaomi Mi TV or Redmi Note refuses to play it? The problem is that there are no codecs, the software modules that decode audio and video. The manufacturer sets the basic set, but it often does not support modern formats like H.265 (HEVC), DTS:X or Dolby Vision.

In this article, we will discuss how to add missing codecs to any Xiaomi device – from Mi TVs TV Q2 smartphone POCO F5. Methods vary depending on the type of device and firmware version MIUI/PatchWall, But they're all tested on current models. 2023–2026 Important: Some methods require unlocking the bootloader or root rights, and we'll give you a heads-up.

Before you start, make sure that the codecs are the problem. If video is slowing down but it's playing back, it's the performance of the device. If there's sound and there's no picture (or vice versa), it's 100% codec deficiency. Also check if the playback is blocking. DRM-Protection (for example, on Netflix or Disney)+).

What codecs are most often missing on Xiaomi

The manufacturer saves firmware space by eliminating underutilized formats, and here is a list of codecs that are most likely to have problems:

• 🎬 Video: H.265 (HEVC) into 10-bit-colored, AV1, VP9 Profile 2 (for 4K/8K), MPEG-2 (old DVD-rip-off).
• 🔊 Audio: DTS:X, Dolby Atmos (not to be confused with Dolby Digital!), FLAC 24-bit/192kHz, APE.
• 📁 Containers: MKV multi-track, TS/M2TS (for Blu-ray), MOV with ProRes.

The problem is especially acute on Xiaomi TVs with PatchWall firmware – they often do not support even the basic AC3 (Dolby Digital), let alone TrueHD. On smartphones, the situation is better, but there may be no codecs for AV1 (used on YouTube for 8K) or HDR10+.

⚠️ Note: On Xiaomi TVs with PatchWall firmware version below 3.0, install codecs through APK This may cause a system failure. Before you start, check the version in Settings. → On TV.

Method 1: Install codecs through third-party players (without root)

The safest method is to use apps that contain their own codecs, which works on all Xiaomi devices, including TVs and smartphones, but has a limitation: codecs will only be available in this player.

Best options:

• 🎥 VLC — supportive AV1, H.265, DTS even DVD-On TVs, it is installed via Send Files to TV or ADB.
• 🎵 MX Player – optimized for Xiaomi, has built-in codecs for AC3 and DTS (You need to turn it on in the settings).
• 📺 Kodi – universal media center with support HDR10+ Dolby Vision, but requires customization.

For installation on the TV:

1. Download. APK-player-file USB-accumulator.
2. Connect the flash drive to the TV and open the File Manager.
3. Run the APK and allow installation from unknown sources in Settings → Security.

Download APK from the official website (not from torrents!)

Check the Android version (should be at least 9.0)

Disable the antivirus (can block the installation)

Make a backup copy of the data (in case of failure)

-->

On smartphones, the process is simpler: download the player from Google Play or via APKMirror. After installation, open the application settings and turn on the option "Use internal codecs" (in MX Player it is Decoder → Custom Codec).

⚠️ Note: On Xiaomi TVs with an Amlogic processor (e.g. Mi) TV 4S) Players can slow down when playing 4K H.265. In this case, only hardware acceleration will help (see Method 3).

Method 2: Manually add codecs via ADB (for advanced)

If you need codecs to work systemically (like a standard Xiaomi player), you can install them via ADB. This method is suitable for TVs and Mi Box consoles, but requires a connection to a computer.

You'll need:

• 🖥️ Computer with Windows/Linux and established ADB Tools.
• 📁 Codec files in.so format (can be found on forums) 4PDA or XDA-Developers).
• 🔌 Cable USB (TV-adapter USB-A → USB-A).

Instructions:

1. Turn on USB Debugging on your device: On TV: Settings → About TV → PatchWall version (click 7 times), then Settings → Additional → For developers → Debugging on USB. On smartphone: Settings → About Phone → MIUI version (click 7 times), then Additional → For developers → USB debugging.

adb devices

The name of your device should appear.

adb push libmedia.so /system/lib/


adb push libstagefright.so /system/lib/

adb reboot

After rebooting, check the playback of the problem file. If the codecs don't work, they may not be compatible with your firmware version, in which case only codec-enabled firmware will help (see Method 4).

💡

Before copying the codecs, back up the original files with the command adb pull /system/lib/libmedia.so. This will help restore the system if something goes wrong.

Method 3: Firmware custom core with support for codecs (root)

If previous methods didn't work, the radical way is to install a custom kernel with advanced codec support, which requires unlocking the bootloader and root rights, but allows maximum compatibility.

Suitable cores for Xiaomi devices:

• 📱 For smartphones: FrancoKernel, ElementalX (supported) AV1 and HDR10+).
• 📺 For TVs: CoreELEC (based on LibreELEC, supports Dolby Vision and DTS:X).

Step-by-step instructions for smartphones:

1. Unlock the bootloader through the Mi Unlock Tool (instructions on the official Xiaomi website).
2. Install TWRP Recovery for your model (you can download it on XDA-Developers).
3. Download. ZIP-kernel file (e.g., FrancoKernel for Xiaomi 13) and transfer it to your phone.
4. Download to TWRP (hold Power + Volume Up) and run the kernel through Install.
5. Install Magisk to manage root rights.

For TVs, the process is more complicated, requiring CoreELEC firmware on a microSD card, and detailed guides are available on the 4PDA forum on topics related to your model (for example, Mi TV 4S).

⚠️ Attention: Installing a custom core will void the warranty and may result in a device "brick" if you choose an incompatible version. Before firmware check the compatibility of the kernel with your model and version MIUI/PatchWall.

💡

Custom cores not only add codecs, but also improve performance, reduce heat and increase battery life. However, they require regular updates to be compatible with new firmware versions.

Method 4: Update firmware to version with support for codecs

Sometimes the problem is solved by a banal firmware update. Xiaomi periodically adds support for new codecs to official releases, especially for flagship models.

How to check and update the firmware:

• 📺 On TV: Settings → On TV. → Updating the system.
• 📱 On a smartphone: Settings → The phone. → Update MIUI.

If the update is not available, you can install it manually:

1. Download the latest firmware for your model from en.miui.com.
2. Transfer the.zip file to the root folder of the device.
3. On your smartphone: open MIUI Update → Three dots → Select a firmware file.
4. On TV: use ADB to install: adb sideload update.zip

List of firmware with advanced codec support:

If your model does not support the desired codecs even in the latest firmware, you just have to wait for the update or use alternative methods (for example, for example, the model does not support the desired codecs, DLNA-feed-off).

Frequent Mistakes and How to Avoid Them

When replacing codecs, users often face typical problems. Here's how to solve them:

• 🚫 "File is not played" after codecs are installed: Check if the codecs are compatible with your version of Android. e.g. Dolby Vision requires Android 10+.
• 🔄 The TV got obsessed with the logo after the firmware: "This means the kernel or firmware is incompatible. Try reflashing the device via Fastboot.
• 🔊 Sound is there, video is not (or vice versa): You probably only installed some codecs. MKV s DTS You need both codecs – video and audio.
• ⚡ The device overheats when playing: This is normal for 4K H.265 on weak processors (e.g., Mi) TV 4A). Try lowering the resolution or using an external player.

If nothing works, try resetting to factory settings (on TV: Settings → Reset; on smartphone: Settings → Resetting). This often resolves conflicting codec issues.

FAQ: Answers to popular questions