Some MP4 won't play on my U23 Pro

Unable to play MP4 files on your HTC U23 Pro? Your MP4 files probably contain video or audio codec that your device doesn’t support. If that’s the case, you will need to convert them first. This guide explains how to do this in detail.

“Hi, any ideas why my HTC U23 Pro doesn't play MP4 videos. I've copied several MP4 clips onto my SD card. It turns up in the media player app. But when I go to play it a popup message saying something like ‘this video cannot be played’. Strangely I earlier put an AVI video onto the same SD card. I can play this AVI video fine in the same video player app. MP4 should be playable on HTC U23 Pro. Why did this happen? Is there anything I can do to solve the issue? Thanks for any help.”

Your MP4 files may include a video or audio codec that is not supported by your device. This issue can be solved by converting them to HTC U23 Pro supported H.264 MP4 format. Check out a how-to guide on this.

Part 1: MP4 conversion suggestion for HTC U23 Pro (on Windows)
Part 2: MP4 conversion suggestion for HTC U23 Pro (on macOS)

Part 1. MP4 conversion suggestion for HTC U23 Pro (on Windows)

To convert MP4 video files for HTC U23 Pro playback on Windows, do as below:

Download and install Video Converter on your Windows computer.

Step 1: Import your video files
Click “Add File” to load your video files that you want to convert into this program.

Step 2: Select output format for HTC U23 Pro
Click “Profile” to select “HTC” > “The corresponding Profile of your HTC phone “ as output format. This format profile will ensure a good performance while playing with HTC U23 Pro.

If you can’t find a suitable profile for HTC U23 Pro, you can also select it directly, as shown in the following figure.

Tips:
If necessary, you can click “Settings” button to modify video and audio parameters like encoder, resolution, frame rate, bitrate, aspect ratio, sample rate, and audio channels.

Similarly, if you don’t find a suitable profile, you can also set it directly for the general profile, as shown in the figure below

Step 3: Click “Convert” to start.

As soon as the conversion is complete, click “Open Folder” to get the generated MP4 files that are suitable for playing on your HTC U23 Pro. No audio lost issues will occur any more.

Part 2. MP4 conversion suggestion for HTC U23 Pro (on macOS)

To convert MP4 video files for HTC U23 Pro playback on Mac, do as below:

Download and install Video Converter on your Mac computer.