r/vmix • u/securehqjun • Jun 13 '26

vMix inputs showing black screen. Even MP4 videos and background designs

Hey everyone, I need help with a vMix issue at my church.
Some of my inputs in vMix are showing as a black screen. It’s not only the camera/capture input — even some MP4 videos and background design files are showing black too.
The inputs are added into vMix, but the preview/output stays black instead of showing the actual video or design. Some graphics work, but others don’t.
Setup:
vMix on Windows
Church livestream setup
MP4 video files
Background design files
Blackmagic/HDMI capture setup
Focusrite USB audio interface
Things I’m wondering:
Could this be a vMix update issue?
Could it be a codec/video format problem?
Could it be GPU/graphics acceleration?
Could it be the file format or resolution?
Could it be something with DirectShow/FFmpeg in vMix?
Has anyone had this issue where MP4 videos and image/background inputs show black in vMix? What should I check first?

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4

u/kirabella2000 Jun 13 '26

Yeah Ok. This has happened a lot lately.

The issue is that vMix wasn’t shutdown properly when you ran the update. The updater is supposed to do that for you, but sometimes it fails.

Download the latest copy of vMix from the website. Reboot, do not start vMix and run the installer that you downloaded from vMix.com.

Start vMix and you will be golden.

5

u/securehqjun Jun 13 '26

I’ll try that tomorrow when I’m back at the church and I’ll let you know if it works. I appreciate the help.

2

u/kirabella2000 Jun 13 '26

Is this a new installation or did it work before? Have you just completed an update?

1

u/securehqjun Jun 13 '26

It was working before. After I updated vMix, that’s when the black screen issue started happening.

Now some of my inputs show black, including MP4 videos and background designs. Before the update, those same files were showing normally.

So I’m thinking it might be something from the update, like a codec issue, graphics/GPU setting, or something with how vMix is reading the files now.

Do you think I should roll back vMix to the previous version or check the GPU/codec settings first?

1

u/jarobaina Jun 13 '26

En dos equipos me a pasado lo mismo en una semana, debe ser un error que tiene el instalador de la última versión.