black screen captured

[jcyuan]

Hi @smasherprog , i found that most time this lib works very well, but still chance that it will capture a black screen image, i'm not sure why it happened.

what i did is in my onNewFrame callback to stop the capturing (mgr.PauseCapturing()), because 1 frame is enough for me.
is this the reason? why the first frame is black sometimes (very rare chance actually), how can i avoid this to happen?

thank you.

[smasherprog]

As afar as why it can be black, i am unsure.

Why is this a problem? The next frames should be correct, right? So if your doing any kind of a desktop streaming, this isnt noticeable at all and a non issue?

[smasherprog]

You only ever want to capture a single frame and then stop? If thats the case id add code to check if the first frame is black, and skip it and STOP at N checks.
If you want to debug the program, maybe theres some error I am not capturing correctly when gathering the first frame?
Should be ez to debug as the code isnt very complex.

[jcyuan]

You only ever want to capture a single frame and then stop? If thats the case id add code to check if the first frame is black, and skip it and STOP at N checks.

exactly!
because i'm making a screen color picker, so 1 frame is enough for this.

please give me some hints where should I dig into the source code for how to check if the current frame is a black screen? i wanna try to fix it myself first as i know you might be busy so i'm unsure when you can fix it.

[smasherprog]

This is the function that does the capturing. If there is an error, it will be in here

screen_capture_lite/src_cpp/windows/DXFrameProcessor.cpp

Line 300 in 1170d57

DUPL_RETURN DXFrameProcessor::ProcessFrame(const Monitor &currentmonitorinfo)

[jcyuan]

This is the function that does the capturing. If there is an error, it will be in here

screen_capture_lite/src_cpp/windows/DXFrameProcessor.cpp

Line 300 in 1170d57

DUPL_RETURN DXFrameProcessor::ProcessFrame(const Monitor &currentmonitorinfo)

😵 well, I don't know DX11 well... is there a way to check if the current frame is fully black in C# side? so that i won't call mgr.PauseCapturing() in this case to stop the capturing?

[smasherprog]

The only thing i can do is point you in the code section. If you find a bug please post a PR