How to Fix Cannot Play 4K Video on iPhone?

4K to iPhone Video Converter - Change 4K Video to iPhone Supported MP4 H.264

Many iPhone users like to use their iPhone to play videos because it is convenient. But iPhone can not play any video file and many iPhone users have failed to play some 4k videos. Any solution? The answer is Yes and the following article just gives you the easiest solution as well as shares the reason why iPhone can not play 4k videos.

Why iPhone Can Not Play 4k Videos?

The failure for not playing 4k videos on iPhone can be caused by many factors and I just list the main ones.

Old iPhone Model

The relatively newer iPhone models support 4K video. If you have one older iPhone model its supported file formats and resolution are both limited, so you will fail to open some 4k videos on it.

Unsupported Video Codecs

iPhone has been updated very fast, but its supported file formats are not that wide. Even iPhone 15 only gets HEVC, H.264, ProRes videos supported. So even if you have a newer iPhone device you still can not open some 4K videos if your video file is not in the above mentioned codecs.

Unsupported Aspect Ratio, Bitrate, Frame rate

Also, the video aspect ratio, bitrate or frame rate can also cause the playback failure of some 4k videos, so you also need to make your 4K video file with the supported aspect ratio, bitrate, frame rate, etc. For example, many iPhone users have failed to play 4k videos with 4:3 aspect ratio, but succeeded to play the same 4k videos with 16:9 aspect ratio.

How to Play Any 4K Video on Any iPhone Device?

To ensure that your 4k video can be successfully played on your iPhone, you had better convert your unplayed 4k video to MP4 H.264 with 1080p resolution and 16:9 aspect ratio, to do which a professional 4k to iPhone converter - Avdshare Video Converter is recommended. It can efficiently do the following tasks.

  1. Convert any 4k video from any source to MP4 H.264 with 1080p/720p resolution and preferred aspect ratio.
  2. Convert any unsupported video file to any iPhone device best supported MP4 H.264 with preferred resolution and aspect ratio.
  3. Lose no quality during the 4k video to iPhone MP4 H.264 conversion process.
  4. Super high conversion speed ensures that you can finish your 4k video to iPhone video conversion within very short time.
  5. Support to batch convert many 4k videos to iPhone MP4 H.264 at one time.
  6. There will be ad or virus during the 4k video to iPhone MP4 H.264 conversion process.

Guide on Converting 4K Video to iPhone MP4 H.264

You can follow the guide below to convert your 4K video to your iPhone best supported MP4 H.264 with preferred resolution and aspect ratio.

Make Preparation: Free download the Best 4k Video to iPhone Converter - Avdshare Video Converter

Free download the professional 4k Video to iPhone VideoConverter - Avdshare Video Converter (for Windows, for Mac), install and then launch it, the following interface will pop up.

Step 1 Import Your 4k Video File

Click the Add File button to load your 4k video to this converter. You can also directly drag and drop your 4k video to this converter.

Step 2 Specify iPhone MP4 H.264 as output format

What's better is that this converter is preset iPhone category, so you only need to click Profile button> iPhone category and then this converter will give you iPhone best supported video formats as the output format. Of course, you can also click the Profile button> General Video category to directly choose MP4 H.264 as the output format.

You can click "Setting..." button>"Advanced Settings" Window>"Video Codec">"Aspect Ratio" column to choose 4:3 as the final aspect ratio.

You can also go to "Video Size" column to choose 1080p/720p as your desired resolution.

Finally click "Apply to All" and OK.

Step 3 Complete your 4k video file to iPhone MP4 H.264 video conversion

Finally, click the Convert button to get your 4k video easily converted to your iPhone best supported MP4 H.264 video.