Some users are facing a strange difficulty during video playback in Windows Media Player 12, a vertical red line is reflecting on the screen. VLC individuals are seeing more than likely a green line. Here is why.

You are watching: Red line in the middle of videos

It"s an old concern, I"ve explained in June 2011 for Windows 7 within this Gerguy blog article.

A vertical red line in Windows Media Player 12

A user has reported this habits for Windows 7 in 2010 within Microsoft Answers-Forum as follows:

I have actually a red line running vertically down the middle of the display screen once playing movies with media player on windows 7.

This happens via Windows media player and also windows media player timeless. I can us vlc and I execute not get the red vertical line running down the screen. No matter what movie I play the line is tright here. But it does not show up till I actually push play. When I initially open up the player I have a empty babsence display screen. But as soon as I push play the movie starts and the red line is tbelow. Rapid forward, rewind and also pause, the line stays. How perform I resolve this problem?

Well, the root reason and a solution was presented by Kristoffe Brodeur: It"s the video demo mode in Catalyst video driver settings. Kristoffe wrote:

I have noticed that with Win7 after playing through the Catalyst settings in "Avivio video " you will certainly view "all settings ", then scroll all the way down and tbelow will be a fieldcollection called "video demo mode ".

If you have actually "video demo mode " settings "permit demo mode " check noted via break-up display mode as an choice, you will certainly view a red line. To remove it, ssuggest uncheck "enable demo mode ", push "apply " and then close with "ok ".periodically, you may see a green line, which is a driver for the video card, FFDSHOW or some other codec messed up, or the video card can be damaged, not pushed in all of the means in a pci, agp, or pci-e slot.

A plain but old working solution. I thought, the case would certainly have been solved – yet newly I was alerted from MS Answers about new posts. Obviously new ADM Radeon settings are permitting demo mode aacquire. Here is a user write-up from 2015:

I entered my AMD Radeon Settings application and also schosen the tab "Video". Up in the top, best, corner, sure sufficient, there is a setting for demo. Mine was set to "Demo On". When I adjusted it to "Demo OFF", the red line disshowed up. I just upgraded my AMD chauffeurs to this latest variation and then noticed the difficulty. Apparently, the "Demo" was on by default bereason I never before readjusted any kind of settings. Thanks you for the reminder. Fixed my difficulty.

Anvarious other user expect the mode has been collection throughout driver update.

Yep – fixed my problem by going right into Radeon settings and turning off demo mode. Must have actually been turned on with the last driver updates.

Also in April and July 2016 some customers are reporting this issue for Catalyst or Radeon Settings. One user delivers a hint, why some users are facing this issue.

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I had actually absolutely the same trouble right here and also regulated to uncover a solution for it. The alternative "Tearing Test" was allowed for me. It seems choose I pressed Ctrl+T combicountry and turned it on (wanted to develop a new tab in a browser). You deserve to also attempt to usage this combicountry or go to View -> Renderer Setups -> Tearing Test and also disable it.

Maybe it"s the Ctrl+T shortreduced vital combicountry that was accidentally offered during procedure, that permitted demo mode. Someone wrote: Right click RADEON settings on your mechanism stray and also under VIDEO PROFILE select default. That shall solve the worry.

VLC displays a green line

If users are seeing a green line throughout video playearlier in VLC player, there is also a settings solution, posted within the same MS Answers threview. Proceed the followings steps:

Tools food selection –> Precommendations –> Video –> Choose OpenGL under Output choices –> Rebegin VLC.Tools menu -> Preferrals -> Video -> Uninspect "Accelerated Video Output (Overlay") -> Restart VLC.