Modern Xiaomi Mi TVs and Redmi TVs are marketed as multimedia centers capable of playing content from any source, including external drives. However, when you plug in a flash drive with movies, users often face a situation where the device emits a playback error or only shows sound without an image, this is due to differences in file containers and codecs that are sewn into the Android TV or PatchWall operating system.
Understanding what video format your TV processor can decode is key to successful viewing. Standard media players preinstalled by the manufacturer have a limited set of supported codecs compared to third-party applications. In this article, we will discuss in detail the technical features of playback, the nuances of file systems and ways to solve problems with incompatible files.
It’s important to consider that format support can vary depending on the model’s year of release and the firmware version installed. Newer models based on Android 10 and higher have broader hardware support for HEVC and VP9 codecs, whereas older versions may require content conversion. Let’s look at the basic standards that are guaranteed to work on most of the brand’s devices.
Basic compression standards and containers
The basis of any video stream is a bundle of container and codec. The container is a shell of a file (for example,.mkv or.mp4), and the codec is an algorithm for compressing video data inside it. Xiaomi TVs natively and without installing additional software perfectly cope with basic industry standards. The most versatile is the MP4 container, which is supported by almost all devices without exception.
Codec is most often used inside containers. H.264 (AVC). This is the "gold standard" of compression, which provides good quality with an acceptable file size and minimal load on the TV's processor. H.264, the probability that Mi TV It can't reproduce them, it's going to zero, and it's also widely supported. AAC, which often pairs with video.
But when it comes to high-quality movies, the situation gets complicated: formats like MKV are just a shell that can contain video compressed by modern HEVC codecs (H.265) or outdated ones like MPEG-2. If the MKV shell is supported by the system, but the internal video stream is encoded into an unsupported profile, the TV will give an error.
- 🎬 MP4/MOV: Perfect compatibility, codecs H.264, AAC audio.
- 🎬 MKV: Supported by most models, but dependent on the internal video codec.
- 🎬 AVI: Outdated format may not support modern audio tracks (e.g., audio tracks, AC3).
- 🎬 TS/M2TS: Digital TV formats often require a powerful processor to decode.
⚠️ Note: Availability of file extension.mp4 It does not guarantee reproduction if inside the container MP4 A new or rare audio codec is used (for example, DTS-HD Master Audio, built-in player can refuse to play the file, even if the video track is standard.
It’s also worth noting the difference between software and hardware decoding: Xiaomi’s built-in player relies on chipset hardware. If the TV’s processor doesn’t have a physical module to decode a particular type of compression, software can’t bypass this limitation with standard means, which is why files with a bit rate above 100 Mbps or complex frame structure can cause delays or no image at all.
The problem of AC3 and DTS audio codecs
One of the most common reasons why Xiaomi TVs don’t play flash drive videos is the audio track incompatibility.The video stream may be absolutely standard (H.264), but the sound in the file is encoded in Dolby Digital (AC3) or DTS formats. Due to licensing restrictions, TV manufacturers often don’t include decoders of these formats in standard firmware.
As a result, the user sees a black screen or format error message, although the video file is correct. This is especially true for downloaded movies in good quality, where the 5.1 soundtrack is the standard. Android TV sees the file, but can not decode the audio stream, which blocks the launch of the entire media file.
There are several ways to solve this problem: the easiest way is to use a third-party video player that has built-in software decoders and does not depend on the system constraints of the TV. However, if you prefer a native interface, you will have to look for versions of files with an AAC or PCM audio codec. The table below shows a comparative characteristic of audio support:
| Audio codec | Native support | Third-party player required | Sound quality |
|---|---|---|---|
| AAC / MP3 | ✅ Complete. | ❌ No. | Standard. |
| Dolby Digital (AC3) | ⚠️ Partial | ✅ Often required | Volumetric 5.1 |
| DTS | ❌ Absent. | ✅ I'll be sure. | Volumetric 5.1/7.1 |
| FLAC / WAV | ✅ Complete. | ❌ No. | Hi-Res / No losses |
Why are sound licenses paid?
If you often watch movies with high-quality sound, it is recommended to install an alternative player immediately. This will save you from having to search for specific versions of files or engage in conversion. The built-in features of the system are good for viewing photos and simple videos from your phone, but for home cinema, their functionality is often not enough.
Support for modern H.265 and HDR codecs
With the development of 4K and HDR, the H.264 code has been replaced by the HEVC standard (H.265), which allows you to compress high-resolution video twice as efficiently as its predecessor without loss of quality. Xiaomi 4K TVs are usually equipped with processors that support hardware decoding H.265, this applies to models released in the last 3-4 years.
But codec support is only half the battle, with bitrate and coding profiles playing a major role. 4K HDR files with high bitrates (over 60-80 Mbps) can cause slowdowns when played over USB if a USB 2.0 port is used. USB 3.0 port (usually blue) is able to transmit data at sufficient speed for such heavy files.
If the video is encoded in HDR10+ or Dolby Vision and the TV only supports basic HDR10, the image may look faded or have unnatural colors. In some cases, the system will automatically switch to SDR mode, but the result will depend on the specific TV model.
- 📺 H.265 (HEVC): Basic standard for 4K Content supported by most new models.
- 📺 VP9: The codec used by YouTube is supported at the hardware level in MediaTek and Amlogic chips.
- 📺 AV1: New free codec, support is available only in the latest models of TVs 2023-2026 year-end.
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To view 4K HDR movies with high bitrate, be sure to use the blue USB 3.0 port and the NTFS or exFAT file system.
You can test the technical capabilities of your particular TV by running a test video. 4K If you have a file that's twitching and the sound is late, it means that the processor can't decode the stream in real time, and then you can only reduce the quality of the original file or use an external media player (TV-boxing, which will take the load on itself.
File systems and scope limitations
As important as the format of the video is the formatting of the drive itself.The Android TV operating system on which Xiaomi TVs are based has limitations on file system reading. The most common FAT32 system has a critical disadvantage: it does not support writing and reading individual files larger than 4 GB.
The quality of the films is good (especially in the 4K or without strong compression) often weigh more than 4 gigabytes, when trying to play such a file from a flash drive to a computer. FAT32 The TV will simply "not see" the file or will give an error. NTFS exFAT.
NTFS is the most reliable system for Xiaomi TVs. It supports huge files and journaling, which reduces the risk of data corruption if a sudden power outage. exFAT is also suitable and more versatile for porting between Windows and macOS, but some older versions of Android TV firmware may have problems with read stability.
⚠️ Note: Formatting the drive completely removes all data from it. FAT32 on NTFS Make sure to copy important files to your computer.
In addition, there is a limit on the amount of the drive itself. Officially, Xiaomi TVs often claim support for flash drives and hard drives up to 1 TB or 2 TB. USB when connecting large hard drives without its own power source, in such cases it is recommended to use USB-feed-in.
Solving problems through installing a video player
If the TV’s built-in tools can’t play your files, the most effective solution is to install third-party software. The Google Play Store app store on the TV allows you to download powerful media players that have their own codec libraries and are independent of system limitations.
The leader in this category is the VLC for Android app, which can play almost any existing video and audio format, including corrupted files and streams with non-standard bitrates, automatically adjusts frame rates and is able to work with network resources.
Another great option is the MX Player, which is famous for its advanced decoding engine and convenient control gestures. In the MX Player settings, you can switch the decoding mode from hardware (HW) to software (SW), which sometimes helps to run “heavy” files that slow down on a standard decoder.
☑️ Installation of a third-party player
The installation process is simple: just find the app in the store, click "Install" and open it. After the first launch, the application will request permission to access media files - you must agree. USB-drive, and you will get access to all files, regardless of their format.
Image and sound settings for USB
After successful video launch, it is often necessary to fine-tune the image. Xiaomi's built-in player offers basic settings such as brightness, contrast and image mode (Cinema, Sport, Standard), but when playing from USB, these settings may not be applied correctly if the automatic image enhancement feature is enabled.
It is recommended to disable various “improvers” such as dynamic contrast or noise reduction if you are watching quality content. They can introduce artifacts and delays. From the Settings menu → Image, you should choose the Mode “Cinema” or “Standard” and manually adjust the settings for the lighting conditions in the room.
For sound, you can choose the output format in your TV settings (Settings → Sound → Digital Output). If you have an external speaker or receiver connected, select Pass-through mode, which will allow the TV to transmit the original bit stream (such as DTS or Dolby Digital) to a receiver decoder that can handle it better than the built-in speakers.
- 🔊 Stereo Mode: For built-in TV speakers, all formats are reduced to two channels.
- 🔊 Auto/Passthrough: To connect via HDMI ARC oroptics to external sound.
- 🔊 PCM: Forced TV decoding may not work with multichannel sound.
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If when watching a video from a flash drive, the sound lags behind the picture (rassynchron), try changing the delay of the audio with volume keys or in the audio track menu in the player settings (for example, VLC).
It's also worth checking the refresh rate of the screen. For movies, the standard is 24 frames per second. If the settings of the TV (Settings → About TV → Screen) are forced to set 60 Hz, the movement may look jittery. Ideally, the TV should switch to 24 Hz mode itself (or 50/60 Hz depending on the region) when launching the content.