screen-capture

问题 I'm trying to capture a local web page with imagegrabscreen but I only get a black screenshot. I tried almost every solution from questions here on SO and others sites and nothing works. I'm using and done the following: Windows 7 64bit Wamp 2.2a 64bit PHP 5.3.8 gd2 (version: "bundled 2.0.34 compatible") is installed and enabled. Allowed the apache service to interact with the desktop. I don't have a secondary display or anything. <?php $im = imagegrabscreen(); imagepng($im, "myscreenshot.png

问题 I'm trying to use Windows Desktop Duplication API to capture the screen and save the raw output to a video. I'm using AcquireNextFrame with a very high timeout value (999ms). This way I should get every new frame from windows as soon as it at has one, which naturally should be at 60fps anyway. I end up getting sequences where everything looks good (frame 6-11), and then sequences where things look bad (frame 12-14). If I check AccumulatedFrames lFrameInfo.AccumulatedFrames the value is often

问题 Media Foundation h264 encoder poor performance I'm writing an application which records PC's screen in realtime and encodes it with Media Foundation h264 codec. Encoding consumes a lot of CPU resources. And after I stop recording video (or pause it by simply stopping feeding an encoder with video and audio frames), CPU load stays very high for a long period of time (5-10 seconds and more). During this time application waits until IMFSinkWriter::Finalize method completes. My PC configuration:

问题 I am trying to find the answer to a topic which has basically driven me insane. Is there a way to capture the mouse pointer much like Apple's screencapture utility works? What I am trying to do requires me to draw a clear window that does not activate my app but instead overlays everything, including the dock. The only software I have seen do this is screencapture by utilizing command+shift+4. I have tried creating a non-activating NSPanel but it doesn't work with cursor rects unless my app

问题 I would like to take a picture of a fullscreen direct3D game. I know I need to create an "overlay" which is harder in c# and I found out that using printscreen (and than pasting it in mspaint) does capture the game window. I ended up with this unstable code : try { SendKeys.SendWait("{PRTSC}"); Thread.Sleep(100); if (Clipboard.ContainsImage()) return Clipboard.GetImage(); } catch (Exception) { throw; } Bitmap bitmap = new Bitmap(1, 1); return bitmap; This code sometimes work, sometimes it

问题 if one desktop isn't the current desktop，so，windows will not draw it .then capture the screen by DC was not work. help me!!! 回答1: The best you can do is to use the technique described in this article: http://www.fengyuan.com/article/wmprint.html Basically, you have to fool the applications on the other desktop to redraw their windows into a DC of your choice. I did this once - it can be made to work, but it's by no means trivial. There are many drawbacks - e.g. don't expect to be able to show

问题 I am currently developing a little screenshot application which records both of my screen's desktop in a file. I am using the GetFrontBufferData() function and it is working great. Unfortunately when changing the screen color depth from 32 to 16 bits (to perform some tests) I have a bad image (purple image with changed resolution) and the recorded screenshot has a very poor quality: Does someone know if there is a way to use GetFrontBufferData() with a 16 bits screen ? edit: My init direct3D:

问题 I want to capture the screen but without the current form, I tried to minimize -> capture -> maximize, but I'm looking for a better solution if exists. This was my code:: int w = this.Width; int h = this.Height; Size sz = this.Size; Point loc = this.Location; this.WindowState = FormWindowState.Minimized; System.Threading.Thread.Sleep(500); using (Bitmap b = new Bitmap(w, h)) { using (Graphics g = Graphics.FromImage(b)) { g.CopyFromScreen(loc, new Point(0, 0), sz); } b.Save(Environment

问题 There is this weird bug in my program that I'm trying to fix, but I'm really at a loss for what it could be. This part of my program has a dialog which shows previews of various items using MFC/GDI. When I scroll through different items, sometimes the preview image just disappears and goes blank. However, it: Only happens on some machines Apparently happens on both Windows 7 and XP Doesn't happen on the same item every time Item IS STILL THERE when one takes a screenshot, but it is blank when

问题 Hello all i am using the below code to capture the screenshot of the black panel of my window form in visual basic 2005. My problem is that I want the red border image to come in between and to be full. My code : Dim bounds As Rectangle Dim screenshot As System.Drawing.Bitmap Dim graph As Graphics bounds = Screen.PrimaryScreen.Bounds screenshot = New System.Drawing.Bitmap(bounds.Width, bounds.Height, System.Drawing.Imaging.PixelFormat.Format32bppRgb) graph = Graphics.FromImage(screenshot)