Weird issue Changing Screen Resolution does not get reflected Windows 10

[ranjanpr]

I am using ffmpeg to capture screen using screen-capture-recorder.dll after registering it as directshow device. The command which i use is like this

ffmpeg.exe -rtbufsize 150M -f dshow -framerate 30 -i video="screen-capture-recorder":audio="Microphone (Realtek Audio)" -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 28 -pix_fmt yuv420p "test.mp4"

It works perfectly if the screen resolution is not changed even with scaling changed to any percent in windows display settings. For example on a 4k Monitor it works for 3840x2160 @ 100%, 150%, 200% even at 350%. Now if i change the resolution to 1920x1080 at any scale the recording is cropped. What i have observed is if i reboot the machine or sleep/unsleep the issues goes away. Thereafter screen recording works perfectly.

It seems like the screen-capture-recorder itself does not reflect changed resolution. Is there any way to fix it?

[rdp]

That is an interesting idea...

On Friday, September 4, 2020, Prashant Ranjan notifications@github.com wrote:

I am using ffmpeg to capture screen using screen-capture-recorder.dll after registering it as directshow device. The command which i use is like this

ffmpeg.exe -rtbufsize 150M -f dshow -framerate 30 -i video="screen-capture-recorder":audio="Microphone (Realtek Audio)" -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 28 -pix_fmt yuv420p "test.mp4"

It works perfectly if the screen resolution is not changed even with scaling changed to any percent in windows display settings. For example on a 4k Monitor it works for 3840x2160 @ 100%, 150%, 200% even at 350%. Now if i change the resolution to 1920x1080 at any scale the recording is cropped. What i have observed is if i reboot the machine or sleep/unsleep the issues goes away. Thereafter screen recording works perfectly.

It seems like the screen-capture-recorder itself does not reflect changed resolution. Is there any way to fix it?

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[ranjanpr]

I have done a workaround for this issue by cropping the ffmpeg screen recording to the actual display resolution set in display settings. e.g. 3840x2160 display recording when recorded at 1920x1080 resolution ffmpeg.exe -rtbufsize 150M -f dshow -framerate 30 -i video="screen-capture-recorder":audio="Microphone (Realtek Audio)" -vf crop=1920:1080:0:0 -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 28 -pix_fmt yuv420p "test.mp4"

However this issue requires fixing in screen-capture-recorder so that the horizontal and vertical resolution reported by it is proper. @rdp Any pointer in this regard to fix would be highly appreciated.