Testing fullscreen video capturing @ 60 FPS

[wakillon]

 

expandcollapse popup

#Include <WinAPIFiles.au3>


_SetDPIUNAWARE('D:\Bureau\ScreenRecorder\ScreenRecorder64.exe')

Func _SetDPIUNAWARE($sFullPath) ; With a dpi scale > 1
;~  Application compatibily flags are stored in the registry (user or system part):
;~  HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
;~  HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
    Local $iRet, $sHklm
    If _WinAPI_GetBinaryType($sFullPath) Then
        Switch @extended
            Case $SCS_32BIT_BINARY
                $sHklm = 'HKLM'
            Case $SCS_64BIT_BINARY
                $sHklm = 'HKLM64'
            Case Else
                Return SetError(-1, 0, 0)
        EndSwitch
        Local $sReg1 = RegRead($sHklm & '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers', $sFullPath)
        Local $sReg2 = RegRead('HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers', $sFullPath)
        If $sReg1 <> '~ DPIUNAWARE' Or $sReg2 <> '~ DPIUNAWARE' Then
            $iRet = RegWrite($sHklm & '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers', _
                    $sFullPath, _
                    'REG_SZ', _
                    '~ DPIUNAWARE')
            If @error Or $iRet = 0 Then Return SetError(@error, 0, -2)
            $iRet = RegWrite('HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers', _
                    $sFullPath, _
                    'REG_SZ', _
                    '~ DPIUNAWARE')
            If @error Or $iRet = 0 Then Return SetError(@error, 0, -3)

            Return 1
        EndIf
    EndIf
EndFunc   ;==>_SetDPIUNAWARE

Once script run, i run ScreenRecorder64.exe and now i'm able to read your gui

Edited April 26 by wakillon

[wakillon]

When i try to enter 30 fps in your gui settings, numbers are not visibles ... 🤔

Edited April 26 by wakillon

[UEZ]

4 hours ago, wakillon said:

When i try to enter 30 fps in your gui settings, numbers are not visibles ... 🤔

Well, if the background is light, it can be even harder to read the values in the input fields. But when I open the GUI on a white background, I can still see the numbers fairly well. Maybe it’s because I don’t have a 4K monitor and can’t reproduce your problem.

 

On 4/25/2026 at 10:25 AM, Gianni said:

I recorded for about a minute just by pressing the Start button and without changing any settings, but when I open the file, the media player displays this message: "Cannot open Capture_..._... It's using unsupported encoding settings." (win11 x64)
Am I doing something wrong?

Since desktop recordings can get quite large and are recorded internally in high444 format—which not every video player can play—you can easily use FFMPEG to reduce the size of the AVI file and make it compatible so that even the default Windows tools can play it!

Example in CMD:

ffmpeg.exe -i Capture_20260426_181055.avi -c:v libx265 -crf 32 -pix_fmt yuv420p -preset medium output_small.mp4

 

[wakillon]

10 hours ago, UEZ said:

Well, if the background is light, it can be even harder to read the values in the input fields. But when I open the GUI on a white background, I can still see the numbers fairly well. Maybe it’s because I don’t have a 4K monitor and can’t reproduce your problem.

It's incredible !
When i look with my own eyes your gui settings, i don't see any numbers even when placing

the black background of notepad or a white background  behind it

But when i take a screenshot for show you that there is no numbers displayed, the screenshot show well the numbers !!! ☹️

You invented invisible numbers ! 👍

For the suspicious, no, I didn't drink! 😋

Edited April 27 by wakillon

[wakillon]

The proof 

[UEZ]

Ok, you are not drunken. 😉😄

I'm working on fixing the problem. Thanks for testing.

I wonder if others have the same problem...

Edited April 27 by UEZ

[TheDcoder]

First of all, I am sorry for straying away from the main topic but I am curious...

On 4/13/2026 at 7:45 PM, UEZ said:

The previous version used the GDI API to send frames to the codec

What API are you using to capture frames now?

[UEZ]

1 hour ago, TheDcoder said:

First of all, I am sorry for straying away from the main topic but I am curious...

What API are you using to capture frames now?

GraphicsCaptureWrapper is a C++ wrapper using WinRT and DX11 to provide the desktop image to the encoder.

[UEZ]

@wakillon I changed the Settings GUI to DarkMode. It should work now for you, too.

 

You have to download it again -> ScreenRecorder.7z 

Edited April 27 by UEZ

[wakillon]

Gui settings, display ok now

So, with settings to ultrafast and 30 FPS

Video quality ok

Playing ok, i mean playing duration = record duration 🫡

Excellent work 👍

Edited April 30 by wakillon

[UEZ]

Hi everyone,

I’ve updated my video recording tool, now named AirCapRec (v0.7.5).

I need help testing technical edge cases where manual stride handling often fails.

Seeking feedback on:

• "Weird" Resolutions: Any skewed/slanted images on ultra-wide or non-standard window sizes?

• High-DPI / Multi-Monitor: Does the capture area and cursor align correctly at 125% or 150% scaling?

• Stability: Any frame drops or stutter during long sessions?

Download: AirCapRec.zip

If you find a bug, please post your Resolution, DPI Scaling, and Windows Version. You can also enable the Debug Log option in the settings to provide more information.

Thanks for the support!