How to check the codec on Android: a complete guide for users

Have you ever encountered a situation where video on your phone plays without sound or with artifacts? Or does the music file refuse to open in the player? The reason most often lies in unsupported codecs - special algorithms for compressing and decoding multimedia data. Android devices, despite their versatility, do not always support all existing formats out of the box.

In this article we will look at what these are codecs, why their support is important for high-quality content playback, and most importantly - how to accurately determine which codecs are installed on your Android smartphone. You will learn about the system's built-in tools, specialized applications, and even hidden engineering menus that will help you get comprehensive information. It doesn’t matter whether you use Samsung Galaxy S23, Xiaomi Redmi Note 12 or a budget Realme C55 the methods are suitable for most devices based on Android 8.0 and later.

What is a codec and why it needs to be checked

The term codec (from English coder-decoder) denotes a software or hardware module that is responsible for encoding data streams into a compact format and decoding them for playback. Simply put, it is a “translator” between raw audio/video data and what you see on the screen or hear in your headphones.

On Android, codec support depends on three factors:

• 📱 Hardware platform — processors Qualcomm Snapdragon, Mediatek Helio or Exynos have built-in decoders for popular formats (for example, H.264, AAC).
• 🤖 Android version — starting from Android 9 Pie, Google has added support AV1 i Opus, but manufacturers may exclude some codecs in their firmware.
• 🔧 Firmware and modifications —custom ROMs (for example, LineageOS) often expand the list of supported formats.

Why is this important? Firstly, codec incompatibility is a common cause of problems with playing files from the Internet or from external drives. Secondly, knowledge of supported formats will help to optimize streaming (for example, select the correct resolution in YouTube) or save space when converting videos. (for example, Kodi or VLC) can use alternative decoders, but their performance depends on the hardware.

Method 1: through standard Android settings (without applications)

Not everyone knows, but it’s hidden in Android built-in tool for diagnosing multimedia capabilities - MediaCodecInfo. You can access it through engineering menu or special commands ADB. However, there is an easier way that works on most devices without root access:

1. Open application Phone (standard call).
2. Enter the combination: ##4636## (on some firmware it may not work - see alternatives below).
3. In the menu that appears, select Phone information → Media.
4. Scroll down to the section Codecs —supported audio and video formats will be displayed here.

🔹 Alternative method (if the code does not work):

• 📲 Install the application Activity Launcher from Google Play.
• 🔍 Find it in the list of activities com.android.settings.MediaCodecInfo.
• 🛠️ Launch it - a list of codecs will open indicating their status (supported, software, hardware).

⚠️ Attention: On devices with Android 12+ and shells One UI (Samsung) or MIUI (Xiaomi) access to the engineering menu may be blocked. In this case, use the methods from the following sections.

Method 2: applications for analyzing codecs

If standard methods do not work, specialized utilities will come to the rescue. They will not only show a list of supported ones. codecs, but will also test their performance, and also provide additional information about performance.

Application	Features	Link	Requires root
DevCheck	Shows hardware codecs, performance tests, processor information	Google Play	No
Codec Checker	Specialized tool with support for playback tests	Google Play	No
AIDA64	Detailed data on multimedia capabilities, including DRM (Widevine)	Google Play	No
CPU-Z	Basic information about codecs in the "System" section	Google Play	No

Let's take a closer look at working with DevCheck (one of the most informative tools):

1. Download and install the application from Google Play.
2. Open the tab Hardware → Codec.
3. In the section Video you will see a table with supported resolutions and formats (for example, H.265 4K@60fps).
4. In the tab Audio codecs like AAC, FLAC, LDAC (for Bluetooth) will be displayed.

🔹 Important nuance: Some codecs may appear as "supported", but in practice only work through software decoding (which affects performance). For example, AV1 on budget smartphones it is often decoded by the CPU, not the graphics accelerator.

Method 3: via ADB (for advanced users)

If you need maximum complete information about codecs, including low-level details, use the tool Android Debug Bridge (ADB). This method requires connecting the phone to a computer, but gives access to data that is not shown by applications.

📌 Step-by-step guide:

1. Install ADB on PC (download Platform Tools from the Google website).
2. Turn on on your phone USB debugging (Settings → About phone → Build number - tap 7 times, then return to Settings → System → For developers).
3. Connect the device to the PC and run the command:

   adb shell dumpsys media.codec.info

4. B in the output, find sections Video Codecs and Audio Codecs —all available decoders are listed here, indicating their capabilities (for example, maxWidth=3840 maxHeight=2160 for 4K).

🔹 Example output for a video codec:

Video Codec: OMX.qcom.video.decoder.hevc
- MIME: video/hevc
- Profile/Level: Main/5.1
- Max Resolution: 3840x2160
- Hardware: yes

⚠️ Attention: Commands ADB may differ depending on the Android version. On devices with Android 11+ some information is hidden for security reasons. If the command does not work, try an alternative:

adb shell dumpsys media.codec.list

What to do if ADB does not recognize the device?

1. "Transfer files" when connected via USB.

2. Update ADB drivers on your PC (especially important for Windows).

3. Try a different version of Platform Tools (sometimes older versions work more stable).

4. On some devices (for example, Huawei), additional permission is required in the “For Developers” menu - enable it. "Allow ADB debugging."

Method 4: playback testing

The most reliable way to check the codec is practical test. To do this, you will need files with different formats and a player that can show information about codecs (for example, VLC or MX Player).

📌 How to conduct the test:

1. Download test files (can be found on sites like jell.yfish.us —there are samples to check H.265, VP9, AV1 etc.).
2. Open the file in VLC and tap on the screen → Information → Codec.
3. Compare the data with the table of supported codecs from the previous methods.

🔹 What to look for in the results:

• 🎵 Audio: if the file is played, but is indicated in the information Software Decoding —the codec is supported only by software (maybe slow down).
• 🎬 Video: artifacts or “ragged” playback of 4K H.265 indicate insufficient hardware support.
• 🔊 Sound: no sound during playback DTS-HD or Dolby Atmos —the codec is not supported.

⚠️ Attention: Some manufacturers (for example, Samsung) block playback of certain formats in a standard player, but they can work in third-party applications. Always test files in VLC or Kodi.

Method 5: analysis through the engineering menu (MTK and Qualcomm)

Devices on chips Mediatek i Qualcomm have advanced engineering menus where you can find detailed information about multimedia capabilities. These menus are usually hidden, but can be accessed through special codes or applications.

📌 For Mediatek (MTK):

1. Open the application Phone and enter: ##36446337##.
2. Go to section MM Test → Video Codec.
3. All supported video formats will be displayed here, indicating the maximum resolution and bitrate.

📌 For Qualcomm Snapdragon:

1. Enter the code: ##4636## → Phone information → Media.
2. Or use the application Qualcomm Codec Info (available at XDA Developers).

🔹 What can be found out from the engineering menu:

• 📊 Full list hardware decoders (for example, OMX.qcom.video.decoder.vp9).
• 🔢 Maximum parameters for each codec (resolution, bitrate, FPS).
• 🔄 Information about DRM (for example, level Widevine L1 for Netflix in 4K).

⚠️ Attention: Not all codes work on modern firmware. On devices with Android 13+ access to the engineering menu may be limited. In this case, use ADB or specialized applications.

Common problems and their solutions

Even if the codec is supported, problems may arise with playback. Here are the most common scenarios and ways to solve them:

Problem	Possible cause	Solution
Video plays without sound	There is no audio codec (for example, AC3 or E-AC3)	Install a player that supports software decoding (VLC) or convert the file
Video slows down when playing 4K	The codec is supported only by software (for example, AV1 on weak chips)	Lower resolution or use a hardware player (MX Player with the "HW+" setting)
Netflix does not show content in 4K	No support Widevine L1 or codec HEVC	Check the DRM level in AIDA64 or update the firmware
Sound is distorted during playback FLAC	Problems with the driver audio codec	Update the firmware or use an external DAC

🔹 Tip for conversion. conversion: if your device does not support the required codec, use HandBrake or FFmpeg for conversion Optimal settings for Android:

• 🎬 Video: H.264 (or H.265 for new devices), resolution up to 1920x1080 (if there is no 4K support).
• 🎵 Audio: AAC (or Opus for voice). Avoid DTS and Dolby Digitalif you are not sure of support.

⚠️ Attention: On some devices (for example, Sony Xperia) playback Dolby Vision possible only through the standard application Video. Third-party players may not support HDR even if they have a codec.

FAQ: answers to frequently asked questions

Is it possible to add support for a new codec without root?

Yes, but with limitations. Most codecs are implemented at the firmware level, but some applications (for example, VLC or Kodi) include their own software decoders. They will allow you to play non-standard formats, but can load the processor for full hardware support (for example, AV1 on older chips) you will need custom firmware or root.

Why does video play smoothly on one phone, but slow on another, although the codecs are the same?

The reasons may be different:

• 🔋 Chip performance: for example, Snapdragon 888 will cope with 4K H.265 without problems, but Helio G35 will slow down.
• 🔄 Decoding type: hardware (via GPU) vs. software (via CPU).
• 📶 Thermal throttling: When overheated, the processor reduces frequencies, which affects playback.

Check the phone temperature during playback (for example, through CPU Monitor).

How to find out which codec used in YouTube?

YouTube automatically selects the codec depending on the device and network. To see the current one:

1. Open the video in the YouTube application.
2. Tap on the three dots → Statistics for geeks.
3. In the section Codec the video and audio format will be indicated (for example, vp09 for VP9 and opus for sound).

🔹 On a PC, you can force a codec selection via extension h264ify (for H.264 instead of VP9).

Does the codec affect battery life?

Yes, and very significantly! Hardware decoding (for example, H.264 via GPU) consumes significantly less energy than software. For example:

• 🔋 H.265 (HEVC) with hardware support can save up to 40% of the charge compared to H.264 with the same quality.
• ⚡ Software decoding AV1 on weak chips discharges the battery 2-3 times faster.

Use the application AccuBatteryto track consumption when playing different formats.

Is it possible to update codecs on Android?

It is impossible to update codecs separately from the firmware, but there are workarounds:

• 🔄 System update: manufacturers sometimes add support for new codecs in OTA updates.
• 📦 Custom firmware: LineageOS or Pixel Experience often include an expanded set of codecs.
• 🛠️ Root + Magisk: modules like Codec Enabler can activate the hidden capabilities of the chip.

⚠️ Be careful with modifications - they can disrupt the stability of the system or void the warranty.