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.MP4 file extension

To open .MP4 files on Windows, use Windows Media Player or Movies & TV app.

.mp4 files are versatile video files that can be opened with various media players like VLC or QuickTime on different platforms.

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Last updated: March 19, 2026 · Reviewed by Julian Stricker

What “reviewed” means on this page
  • Format fit: whether the “what is this file?” description plausibly matches common real-world use of the extension, including category, typical MIME types, and aliases.
  • Opening paths: whether Windows / macOS / Linux steps read plausibly for current OS dialogs and default apps. Not every step was tested on every OS version.
  • Security framing: whether risk notes match the extension class (for example executables vs plain data) and whether affiliate wording does not contradict the security section.
  • Sources and further reading: external links should point to vendors, standards bodies, or other primary references where possible; not every detail is individually sourced.
  • Limits: this is clarity and safety-messaging QA, not a guarantee that every statement is exhaustive or that every binary you download is harmless. Pages without “Reviewed by” have not been through this editorial pass yet.

Full methodology in the Imprint — The Imprint also states where AI is used and what that does—and does not—replace.

Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

Edit .MP4 files

Need to change the content, not just open it? These editors work with .MP4 files.

Movavi Video Editor

Cut, join and edit videos, add titles, music and effects.

Wondershare Filmora

Video editor with titles, transitions, effects and AI tools.

We may earn a commission when you use affiliate links. This supports our free file extension guides.

How to open .MP4 files

Use these platform-specific instructions to open .MP4 files safely.

Windows

  1. Use Windows Media Player or Movies & TV app.
  2. Install VLC media player for broader codec support.

Recommended software: VLC media player (free) · Media Player / Films & TV (built in)

Full Windows guide

Mac

  1. Open with QuickTime Player.
  2. Use VLC for additional codec support.

Recommended software: QuickTime Player (built in) · VLC media player (free)

Full Mac guide

Linux

  1. Play with VLC or mpv media player.
  2. Ensure necessary codecs are installed via package manager.

Recommended software: VLC media player · mpv

Full Linux guide

iOS

  1. Open with the native Photos app or VLC for iOS.

Recommended software: Photos and Files app (built in) · VLC for Mobile (free)

Full iOS guide

Android

  1. Use the default video player or VLC for Android.

Recommended software: VLC for Android (free) · Google Photos

Full Android guide

Security notes

  • Always update media players to protect against vulnerabilities.
  • Be cautious when opening MP4 files from untrusted sources.
  • Ensure your antivirus software is up to date to scan for malicious files.
  • Avoid downloading MP4 files from suspicious websites to prevent malware infections.

Can't open this file?

These are the most common causes and fixes when .MP4 files fail to open.

Common reasons

  • Black screen with audio
  • No sound during playback
  • File won't open
  • Video plays choppy
  • Error 0xc00d36c4: "This item was encoded in a format that's not supported"
  • The video does not play on a TV, car system or older device

Fix steps

  1. Try using VLC or another media player with extensive codec support.
  2. Convert the file to a more compatible format using ffmpeg.

Repair a damaged .MP4 file

If the file opens with errors or not at all, a dedicated repair tool can often rebuild it. Work on a copy and keep the original file untouched.

Wondershare Repairit (Video)

Repairs corrupt or unplayable video files such as MP4, MOV and AVI.

We may earn a commission when you use affiliate links. This supports our free file extension guides.

Recover a deleted or lost .MP4 file

If the file was deleted by mistake or the drive was formatted, data recovery software may be able to get it back. Stop writing to that drive right away, because new data can overwrite what you want to recover.

MiniTool Power Data Recovery

Windows software that recovers deleted or lost files from PCs and external drives such as HDDs, SSDs, USB drives and memory cards, after deletion, formatting or a crash.

Wondershare Recoverit

Windows and Mac software that recovers deleted or lost files from computers and external drives such as HDDs, SSDs, USB drives and SD cards.

We may earn a commission when you use affiliate links. This supports our free file extension guides.

OS-specific troubleshooting

Convert .MP4 to other formats

Use conversion tools to change .MP4 files into formats your software supports.

What is a .MP4 file?

MP4, or MPEG-4 Part 14, is a digital multimedia container format that supports multiple data types such as video, audio, and subtitles. It is widely compatible with various devices and platforms, though playback depends on the codecs used within the file.

Background

The MP4 format was developed as part of the MPEG-4 standard by the Moving Picture Experts Group (MPEG) in 1998. It has become one of the most popular video formats due to its efficient compression and ability to maintain high quality, making it ideal for online streaming and mobile playback. MP4 files can contain a variety of data streams, including video, audio, subtitles, and still images, making them versatile for different media applications. This format is widely supported across various platforms and devices, including computers, smartphones, and tablets, which contributes to its popularity. MP4 files are often used for sharing videos on the internet, streaming services, and storing personal video collections.

Common MIME types: video/mp4

Further reading

Authoritative resources for more details on the .MP4 format.

Common .MP4 issues

Black screen with audio

This occurs when the video codec is unsupported by the player.

  1. Try using VLC or another media player with extensive codec support.
  2. Convert the file to a more compatible format using ffmpeg.

No sound during playback

The audio codec may not be supported by the media player.

  1. Check the volume settings and ensure they are not muted.
  2. Use VLC or update the media player to the latest version.

File won't open

The file might be corrupted or improperly downloaded.

  1. Attempt to re-download the file.
  2. Try opening the file with a different media player.

Video plays choppy

This can happen due to high resolution or insufficient system resources.

  1. Close other applications to free up system resources.
  2. Try lowering the video resolution or using a more efficient player like VLC.

Error 0xc00d36c4: "This item was encoded in a format that's not supported"

Windows Media Player and Films & TV only decode some codecs. MP4 is only the container; the video inside is often H.265 (HEVC) or another codec Windows does not include by default.

  1. Open the file in VLC media player, which ships its own codecs.
  2. Alternatively install the "HEVC Video Extensions" from the Microsoft Store if the video uses H.265.
  3. To make it playable everywhere, re-encode it to H.264/AAC with a tool such as HandBrake (free).

The video does not play on a TV, car system or older device

These devices often support only H.264 video with AAC audio inside the MP4 container, at limited resolution.

  1. Re-encode the video to H.264 and AAC, at 1080p or lower.
  2. Copy it to the device on a FAT32 or exFAT drive; files above 4 GB do not fit on FAT32.
  3. Check the device manual for the supported profile and level.

FAQ

Can MP4 files contain multiple audio tracks?

Yes, MP4 files can include multiple audio tracks, allowing for different languages or commentary.

Is MP4 the same as M4V?

M4V is a file extension similar to MP4, often used by Apple, but may include DRM protection.

Why is MP4 so popular?

MP4 is popular due to its efficient compression, high quality, and wide compatibility with devices and platforms.

Can MP4 files be edited?

Yes, MP4 files can be edited using video editing software like Adobe Premiere Pro or iMovie.

Similar file extensions

Compare related formats in the same category to find the right tool faster.

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