Video 'too large' for screen

[Kokopelli]

Hi, something's wrong with my video settings, and I can't figure out what. The output from the video player is larger than the screen, so to speak, and I cannot figure out what to do about it. The screen is 4:3, I run Windows 10 and the player is MPC-HC, PotPlayer, Kmplayer, VLC and others. I use Avidemux for editing videos and occasionally VirtualDub.

I am grateful for any and all help with this.

[Attachment 93898 - Click to enlarge]

[jagabo]

Is your screen a TV or a computer monitor? TVs typically overscan by default.

https://www.videohelp.com/glossary?O#Overscan

Modern digital TVs allow you to turn that off. Older analog TVs didn't.

[Kokopelli]

It's a PC.

[jagabo]

I know you are using a PC, it's obvious from all the players you listed. The question is what is the display? A TV or a monitor? You might as well tell us the manufacturer and model too. And how is it connected? DisplayPort? HDMI? DVI? Component? Composite?

[Alwyn]

You're not giving us much to go on, and that attachment is of no value; what is it actually showing?

1. Your screenshot is a vertical format. Is that what your video is?

2. In VLC Player, go to Video>Untick "always fit window" then set "Zoom" to 1/4. How much of your video do you see?

3. Have you set your monitor to the proper settings? Right-click on your Desktop>Display Settings>Scale and layout.

[Alwyn]

Another check... in AVIDemux when on the Video Filters screen, after you've set up your filters, click on "Preview". What do you see? Your whole video or only parts of it?

[Kokopelli]

Taking time out . . .

[fred_abila]

If the picture is larger than the display in every player, it is almost never the editor. Avidemux/VirtualDub only write the file; the players are honouring a wrong frame size or a wrong display aspect ratio in the stream, or Windows is scaling a non-native resolution.

Quick checks:
1. Open the file in MediaInfo and note Width, Height, Display aspect ratio, and "Original display aspect ratio". If DAR is 16:9 on a 4:3 panel (or the coded size is e.g. 1920x1080 while the monitor is 1024x768 without desktop scaling set sensibly), every player will letterbox or crop differently — some will blow the image past the edges.
2. In MPC-HC: Right-click > Video Frame > try "Touch window from inside" and also View > Options > Playback > output. Reset zoom to 100% (Numpad 5 is the usual reset).
3. In Windows Display settings, set Scale to 100% and the resolution to the monitor's native size. A 4:3 CRT/panel driven at 16:9 desktop resolution will look "too big" in odd ways.
4. If MediaInfo shows a crazy sample aspect ratio (SAR), re-mux or re-encode with square pixels and the correct DAR. In ffmpeg: -vf "scale=iw:ih,setsar=1" and set -aspect 4:3 or 16:9 to match the screen.

Post the MediaInfo text for one problem file (View > Text) and the monitor model / native resolution, and someone can give the exact resize line.