iPhone HEVC video won’t play on Windows? Here is why, and the fixes

You AirDropped or copied a video from an iPhone to a Windows PC and it arrived as a .mov that Windows Photos refuses to open, or plays as sound with a black picture, or says it needs an extension from the Store. Nothing is broken. The video is in a newer format that Apple devices decode and most Windows PCs do not. Here is what happened, how to make it play, how to stop it happening again, and how to convert the videos you already have without uploading them anywhere.

What actually happened

Since iOS 11 in 2017, iPhones record video by default in a setting Apple calls High Efficiency. Photos are saved as HEIF files and videos as HEVC (High Efficiency Video Coding, also known as H.265) inside a QuickTime .mov container. HEVC produces files roughly half the size of the older H.264 at the same quality, which is why Apple chose it, and why a three-minute 4K clip is 1.4 GB instead of 3 GB.

Windows plays the .mov container happily; it has done so for years. What it lacks out of the box is an HEVC decoder. Decoding HEVC is covered by patents, and Microsoft chose not to pay the licence for every copy of Windows. So the Photos app and Media Player open the file, find a codec they do not have, and show the error, or play the AAC audio with nothing to draw.

The same split explains the other symptoms people report: a video that plays in VLC but not in Photos (VLC ships its own decoder), a video that plays on one PC but not another (one has the extension or a graphics driver that supplies it), and photos that arrive as HEIC with a matching problem.

What HEVC is and why Apple uses it

HEVC is the successor to H.264, standardised in 2013. It achieves its savings by analysing bigger blocks of the picture, predicting motion more cleverly and spending bits where the eye will notice them. It also supports 10-bit colour and high dynamic range, which is how an iPhone records HDR and Dolby Vision video; H.264 in practice does neither.

For a phone with limited storage and a camera that shoots 4K at 60 frames per second, halving the file size is a large win, and within Apple’s ecosystem the cost is nil because every iPhone, iPad and Mac from the last several years decodes HEVC in hardware. The cost appears at the boundary, when the file meets a device outside that ecosystem. Apple’s own apps smooth some of this over: when you share by AirDrop, Messages or Mail to a device that cannot play HEVC, iOS may convert the video to H.264 first. Copying files directly over a cable, or through a cloud drive, bypasses that step and hands over the raw HEVC file.

Fixes on the Windows side

Install an HEVC decoder. Microsoft’s HEVC Video Extensions package in the Microsoft Store adds the codec to Photos, Media Player and anything else that uses Windows’ built-in decoding. The Store listing normally carries a small charge; some PC manufacturers preinstall a free edition. With it installed, the original files play as they are, which is the best outcome if you want to keep HEVC’s smaller files.

Use a player that brings its own decoder. VLC, MPC-HC and mpv decode HEVC without any system extension. This gets the file playing but does not help apps that rely on Windows’ decoders, such as the Photos editor or an older video editor.

Convert the file to H.264. This is the universal fix: an MP4 with H.264 video and AAC audio plays in every Windows app, on every Android phone, on TVs and in every chat app, with no extension to install. It is the right choice when the file has to go to other people or into software you do not control. The section below covers doing it privately.

The iPhone settings to change

Two settings decide what your iPhone records and what it hands over.

Settings → Camera → Formats. “High Efficiency” records HEVC video and HEIF photos; “Most Compatible” records H.264 video and JPEG photos. Choose Most Compatible if the videos regularly go to Windows or Android. The files will be larger, and some modes (4K at 60 fps, HDR video, and on recent models ProRes) are available only in High Efficiency, so the phone may offer a trade-off. Videos you already recorded are unchanged by this setting.

Settings → Photos → Transfer to Mac or PC. “Automatic” converts HEVC and HEIF to compatible formats when you copy over a cable to a computer that may not support them; “Keep Originals” hands over the raw files. If you connect your iPhone to a Windows PC and import with Photos or Explorer, Automatic is the setting that saves you the conversion step, at the cost of a slower import.

Neither setting affects AirDrop to a Mac, iCloud Photos on the web or files already synced to a cloud drive; those deliver whatever the camera wrote.

Converting the videos you already have

For the HEVC files already on your PC, phone or drive, converting to an H.264 MP4 is a one-off job per file. The ClipHeron converter does it in your browser: the file is read from your device, the HEVC video is decoded (using your computer’s hardware decoder where the browser exposes it), encoded to H.264 at the Best preset, and written into an MP4 with the AAC audio copied unchanged and the rotation flag carried over so portrait clips play upright. Nothing is uploaded, which matters for family footage. HDR clips are tone-mapped to standard colour so they look right on an ordinary screen.

If the video also needs to be smaller to send, the compressor does both jobs at once: it decodes the HEVC, encodes H.264 at the bitrate that fits your target size and tells you the predicted result before it starts. On a phone the output is capped at 1080p to stay within memory; on a computer a 4K source can stay 4K.

Expect a 4K clip to convert at a few times real-time on a recent laptop with hardware decoding, and slower on an older machine or a phone. The progress bar shows speed and time left, and you can cancel at any point without leaving anything behind. If you only need part of a long clip, trim it first: the HEVC frames are copied losslessly in seconds, and the conversion then has far less to do.

Android, Linux and older Macs

Android phones made since about 2016 decode HEVC in hardware, so an iPhone .mov usually plays once it is in a gallery or player that accepts the container; some apps reject .mov by extension even though they could decode the contents. Remuxing or converting to MP4 fixes the extension problem.

Linux depends on the installed codecs; VLC and mpv play HEVC, while browsers generally do not without hardware support.

Macs from 2015 onwards and macOS High Sierra or later decode HEVC natively; older Macs may play it in software, slowly, or not at all. The conversion route works for all of them.

Convert an iPhone video to MP4

This guide explains how things work in general terms. Platform limits and codec support change; the figures were checked on the date shown above. Spotted something out of date? Email errors@clipheron.com and we will check it against the source.