Windows 10: Can't view some .mp4 videos in Photos app

I'm pretty sure this is a new issue that appeared with the latest updates. I have Windows 10 feature update version 2004 and cummulative update for X64 KB4566782.


I am not able to view some .mp4 videos in Photos or Windows Media Player. The audio works, but the video doesn't. I tried updating my codecs with theK-Lite Codec Pack, which was referenced on several help forums, but this only partly solved the problem. After updating these codecs, I now do see thumbnails of the videos in Windows Explorer, and if I change the extension from ".mp4" to ".video" as suggested by K-Lite, the video opens in Windows Media Player. But it still doesn't open in the Photos app, so I also can't edit it with the Photos app. When I keep the .mp4 extension, I can't open it in either app. These videos are downloaded from my Android Motorola phone. I have other older .mp4 videos that work fine.

:)

 

windows 10 photo/video app file types allowed

using win 10 photo/video app on desktop to create a movie with .jpg, .mp4, & .3gp files.

.3gp will not play correctly.....

what file types are acceptable for import into the win 10 photo/video app?

do I need to convert the file to a .mp4 so it will work in win10 video app?

suggestions for convert app?

 

.MP4 files lose their thumbnails in the Win 10 Photos app, when viewing in "Collection" mode.

First:

Win 10 Home.

Version 1607 (OS Build 14393.576).

Microsoft Photos 16.1118.10000.0.

All available update applied.

Everything, that I know of, works perfectly, except for the following very odd issue with the Photos app.

I power on my pc and then start the Photos app.

I choose the "Collection" option to view all of my files.

Some of my files are .jpg's and some are .mp4's.

Initially, the "Collection" view shows thumbnails for all of my files. Both the .jpg's and the .mp4's.

And this is great.

Most times, I can end the Photos app and restart it several times a day and everything looks good.

But occasionally, when I restart the Photos app, I see thumbnails for all of the .jpg files BUT, instead of having a unique thumbnail for each .mp4 file, I have instead, a grey box, with a round circle in the middle, for each .mp4 file.

I can double click on these boxes and the .mp4 files play just fine.

It's just that my thumbnails have been replaced with these grey boxes.

What always works (to return the .mp4 thumbnails), is to restart the pc.

When the photos app stops showing the thumbnails, if I navigate to the folder that holds the .mp4 files, they all show as little thumbnails in file manager. (As they should.)

It's just the Photos app no longer shows the thumbnails for the .mp4 files.

The thumbnails for the .jpg's do continue to appear in the Photos "Collection" view.

Anyone else have this very odd issue ?

Suggestions would be very much appreciated.

Thanks.

Ray in a snowy and cold Wisconsin

 

MP4 Personal Video files lag after August 2016 update (windows 10)

Hi Nicki,

Do not worry we will help you with this issue.

Try few of the troubleshooting steps below and check if it helps.

Step 1: I suggest you to run Video playback troubleshooter and check

• Press Windows key from the keyboard, type
  Troubleshooting and select it.
• Click on view all option on the upper left corner of
  Troubleshooting window.
• Select the Video playback options from the list.
  
• Click Next to run the troubleshooter.

Step 2: I suggest you to copy the files from your computer to another working computer and check if you are able to access them.

This will let us know if the issue is with specific files types on your computer.

Hope it helps. Update of the status of accessing MP4 Personal Video files for further assistance.

Thank you.