You try to open a video in a standard Xiaomi gallery, but instead of playing it, you see a black screen, a “File Not Supported” error, or a spinning download indicator? The problem is familiar to many owners of smartphones on MIUI — from budget Redmi to flagship Xiaomi 13. In 80% of cases, it is not hardware failures that are to blame, but software conflicts that can be fixed without visiting the service center.
In this article, we’ll look at all the possible reasons why video doesn’t open in the gallery, from the banal lack of codecs to hidden firmware bugs. You’ll learn how to diagnose a problem by symptoms (e.g., black screen vs. playback error), which MIUI settings are responsible for media, and what to do if video plays with artifacts or doesn’t start at all.
1. Check the underlying causes: codec and file format
The first thing to rule out is the incompatibility of the video format with the MIUI player. Xiaomi Gallery uses an integrated player that does not support some codecs and containers. For example,.mkv video with the HEVC codec (H.265) may not play on older models (Redmi Note 8, Mi 9T), although newer ones (Xiaomi 12, Redmi Note 11) do not have problems.
How to check the format and codec:
- 📌 Install MediaInfo (available on Google Play) and open the problem file. Pay attention to the Format and Codec lines. ID (video/audio codec).
- 🔍 Compare the data to the table of supported formats below. If the codec is not listed, the video will not be played without conversion.
- 🛠️ Use HandBrake (PC) or Video Converter (Android) to convert. Optimal settings for Xiaomi: container.mp4, video codec H.264 (AVC), audio AAC.
| Container format | Video codec | Audio codec | Support for MIUI |
|---|---|---|---|
| .mp4 | H.264 (AVC) | AAC | ✅ Complete. |
| .mp4 | H.265 (HEVC) | AAC | ⚠️ Partial (depending on the model) |
| .mkv | H.264 | AC3 | ❌ No (conversion required) |
| .mov | ProRes | PCM | ❌ No (only on flagships with the MIUI 14+) |
⚠️ Note: If the video is shot on the iPhone in format HEIC/HEVC, Xiaomi gallery can show a black screen instead of an image. H.264 or installing an alternative player (e.g, VLC).
2. Gallery malfunction MIUI: clearing
If a video has been played before, but suddenly it stops opening, it's the cache of the gallery or the data of the application that's corrupted, and this is a common problem after MIUI updates or memory cleanups through Lean Mode.
- 🖼️ Video is displayed as a black screen with a progress lane.
- 🔄 The load indicator is rotated, but playback does not begin.
- ❌ Error: "File cannot be reproduced».
How to clean cache and gallery data:
- Open Settings → Applications → Application Management.
- Find the Gallery (or Google Photos if you use it).
- Press Warehouse. → Clear the cache.
- If it doesn’t work, choose Clear Data (Warning: This will remove albums and sorting settings!).
Make a backup of important albums
Remember the current display settings
Check the free space on the device (need ≥ 1 GB)
Restart the phone after cleaning-->
Once the data is cleaned, the gallery will restart with the factory settings, so if the problem was in the damaged cache, the video should play back. If not, move on to the next section.
3. Conflicts with MIUI Optimized: Disabling System Improvements
MIUI Optimized is a service package that Xiaomi adds to the firmware to “optimize” the system, but it often causes media playback failures, especially after updates. For example, after the release of MIUI 13, many Redmi Note 10 users complained about the inability to open video in the gallery, the problem was solved by turning off this package.
How to temporarily disable MIUI Optimized:
- Install ADB Tools on your PC and connect your phone over USB (enable USB Debugging in Settings → About Phone → MIUI version by pressing 7 times).
- Enter the command: adb shell pm disable-user --user 0 com.miui.optimization
- Reset the device.
⚠️ Attention: Disconnection MIUI Optimized can cause some functions to function unstable (e.g. gestures or animations). After checking the video, return the package to its original state with the command: adb shell pm enable com.miui.optimization
If the video works after the shutdown, the problem is in the optimizations of Xiaomi.
- 🔄 Update MIUI Up to the latest version (through Settings) → Updating the system).
- 📥 Install an alternative gallery (e.g. Simple Gallery or Google Photos).
- ⚙️ Resetting the application settings (see Section 2).
4.File system problems: damaged sectors and read errors
If the video isn't played only from a memory card or internal storage, but opens on other devices, the file system is to blame.
- 💾 Damaged sectors on microSD (especially after being removed without safely shutting down).
- 🔧 File system errors FAT32/exFAT (For example, after an interrupted recording).
- 📁 Incorrect folder access rights (relevant for rooted devices).
How to diagnose and correct:
- Memory card check: Connect the microSD to your PC via the card reader. Right-click on the card on this computer → Properties → Service → Check (Windows). If you find errors, perform recovery.
- Formatting (if verification fails): Copy all data from the card to a PC. Format in exFAT (for files >4 GB) or FAT32 (if the card <32 GB).
Internal memory check:
- Use the Files by Google app → Cleanup → Free up space → Check the storage.
What if the video is important but not copied from the damaged card?
If the video is stored in internal memory and is not copied even to a PC, try extracting it via ADB:
adb pull /sdcard/DCIM/Camera/your video.mp4 C:\Backup\5. Resetting media settings and drivers
MIUI has hidden settings that are responsible for decoding video. If they get lost (for example, after a failed update or manually changing the parameters through *.prop files), the gallery may stop playing video for no apparent reason.
- 🎬 Video opens but without sound.
- 🖥️ Image "breaks" or goes jerky.
- 🔊 The sound is played, but the screen is black.
How to Reset Multimedia Settings:
- Open Settings → About the phone and 7 times click on the MIUI version to activate the Developer Mode.
- Back to Settings → Additionally. → For developers.
- Find the option to Disable hardware acceleration (decoding video) and turn it on.
- Reset the device.
If that doesn’t work, try resetting Media Server (responsible for multimedia playback):
adb shell pm clear com.android.providers.media⚠️ Warning: After this command, the phone will reassemble the media base (it can take 5-10 minutes!
6. Alternative solutions: third-party players and firmware
If none of these methods worked, radical measures remain:
- 🎥 Installation of a third-party player: VLC, MX Player or Kodi support more codecs than a standard gallery. Download them from Google Play and open the video using Open with».
- 🔄 Firmware rollback: If the problem has appeared after the update MIUI, Return to the previous version via Fastboot (instructions are available on the 4PDA Xiaomi Community).
- 📲 Factory reset: Last resort if the video is not played in any player.Previous backup through Settings → Additionally. → Backup and reset.
For advanced users, if you have an unlocked bootloader, you can install a custom core (such as FrancoKernel) with improved multimedia support. However, this is risky - incorrect settings can lead to a bootloop (locked phone on).
💡
If the video is not played ONLY in a standard gallery but opens in a VLC or MX Player, the problem is with the MIUI firmware, not the file. The solution is to wait for an update or use a third-party player.