The VideoLAN Forums

Hi all,
To VLC player we can select video output module in the option tools->Preferences->Video->Output, how can i choose "WinGdi" with VLC sdk? what is the easiest way?
Thanks in advance.

LibVLC selects the most appropriate video output automatically. You can't change it.

LibVLC selects the most appropriate video output automatically. You can't change it.

If i play a video on a pc with 16 screens, it will be fluent with "win gdi",and will be lagging with "auto output", if use command line can also adds "--vout wingdi", do you have some suggestion to use with libvlc ?

try delete video output plugins files not suitable for you.

I believe that WinGDI is actually the slowest / most processor-intensive video outputs of all on Windows... It does not make much sense to expose it.

You might be better off with custom video output callbacks if you have a specialized use case. Otherwise, deleting other plugins should work as RSATom already wrote.

According to my test on 16 screens with vlc player, the win gdi can play normally while other video output modes will pause for every several seconds. If i choose "windows GDI video output" it will work, if i only keep the wingdi mode and remove the other output module dlls, it will not work. So i want to know which part control the output mode selection in the codes? because that is the easiest way, if can not , then think custom output callbacks, thanks.

You could check with http://www.dependencywalker.com/ (over corresponding video output plugin), maybe you've deleted some mandatory .dll. And try run with "-vvv" (+ maybe https://technet.microsoft.com/en-us/sys ... gview.aspx), maybe you will see something in logs.

btw, what video dimensions do you need to output? something like 4k or full hd and below?

Hi, thanks everybody who have helped me
I resolved it by below way.
const char *parameter[] = {"--vout", "wingdi"};
instance = libvlc_new (sizeof(parameter) / sizeof(parameter[0]), parameter);
If i remove all other dlls except wingdi, it still not work, that means, even remove all the output dlls, it still can play, so there is a default output to play the video which do not use the video output module dlls.
Thanks again!

btw, what video dimensions do you need to output? something like 4k or full hd and below?

I use 4x4 alignment, running on a pc with 4 graphic cards. so the screen wall resolution is 7680 x 4320.

const char *parameter[] = {"--vout", "wingdi"};
instance = libvlc_new (sizeof(parameter) / sizeof(parameter[0]), parameter);

That won't have any effect.

If i remove all other dlls except wingdi, it still not work, that means, even remove all the output dlls, it still can play, so there is a default output to play the video which do not use the video output module dlls.

That is just plain false, and easy to disprove.

That won't have any effect.

hi, below codes works, and then it play video with wingdi output module. I test on screen wall resolution 7680 x 4032, the Direct3D not support so big resolution and will pause every several seconds while wingdi play fluently.
const char *parameter[] = {"--vout", "wingdi"};
instance = libvlc_new (sizeof(parameter) / sizeof(parameter[0]), parameter);