snapshot

How to take a snapshot of HTML5-JavaScript-based video player?

由 让人想犯罪 __ 提交于 2019-11-27 11:15:02
Actually, i have a HTML5 page with JavaScript function that allow me to play a wmv video file. I need to take a snapshot when the video is playing (with pause or without) and saved in any image format JPG or BMP whatever. Any help will appreciate. Thank you. <!DOCTYPE HTML> <html> <head> <title>HTML5 video</title> <script type="text/javascript"> function checkPlay() { var myVideo = document.getElementById("myVid"); var ytStr = '<iframe width="500" height="500" src="C:\XA0002.wmv" frameborder="0" allowfullscreen></iframe>'; try { var canPlay = document.getElementsByTagName('video')[0]

Snapshot of an WPF Canvas Area using RenderTargetBitmap

由 假如想象 提交于 2019-11-27 09:33:22
I want to create a Snapshot of the Canvas Area in my Application. I'm using Visual brush to get the Snapshot and saving the same using PngEncoder. But the resulting PNG is just a empty black image. I'm not sure the issue is with the BitmapSource created or the PNGEncoder issue. Here is the code I'm using to obtain the same. public void ConvertToBitmapSource(UIElement element) { var target = new RenderTargetBitmap((int)(element.RenderSize.Width), (int)(element.RenderSize.Height), 96, 96, PixelFormats.Pbgra32); var brush = new VisualBrush(element); var visual = new DrawingVisual(); var

How to get a snapshot from a webcam with Delphi7 using VFrames(TVideoImage)

由 ↘锁芯ラ 提交于 2019-11-27 07:25:13
问题 I'm using Delphi7 and VFrames (TVideoImage) with this Procedure uses VFrames; .... procedure TForm1.snapshot; var cam:TVideoImage; strlst:TStringList; BMP:TBitmap; begin strlst := TStringList.Create ; cam :=TVideoImage.Create; cam.GetListOfDevices(strlst); cam.VideoStart(strlst.Strings[0]); //specify a cam by number //get snapshot BMP := TBitmap.Create; cam.GetBitmap(BMP); BMP.SaveToFile('test.bmp'); cam.VideoStop; BMP.Free; end; Result blank Bitmap file. 回答1: I made a small wrapper class for

UIImage from a UIView created with snapshotViewAfterScreenUpdates:

由 限于喜欢 提交于 2019-11-26 23:13:27
问题 Is it possible to get a UIImage from a UIView created with snapshotViewAfterScreenUpdates ? A UIView returned from snapshotViewAfterScreenUpdates looks fine when added as a subview, but the following produces a black image: UIView *snapshotView = [someView snapshotViewAfterScreenUpdates:YES]; UIImage *snapshotImage = [self imageFromView:snapshotView]; - (UIImage *)imageFromView:(UIView *)view { UIGraphicsBeginImageContextWithOptions(view.bounds.size, YES, 0.0); // [view.layer renderInContext

Swift & Firebase | Checking if a user exists with a username

由 落爺英雄遲暮 提交于 2019-11-26 23:05:24
问题 I am trying to allow users to start games with and follow other users by searching their username. I need to be able to make sure that a user with that username exists. I was using the following code but although the if is called the else does not get called when it should. let checkWaitingRef = Firebase(url:"https://test.firebaseio.com/users") checkWaitingRef.queryOrderedByChild("username").queryEqualToValue("\(username!)") .observeEventType(.ChildAdded, withBlock: { snapshot in if snapshot

Read committed Snapshot VS Snapshot Isolation Level

由 一世执手 提交于 2019-11-26 22:30:48
问题 Could some one please help me understand when to use SNAPSHOT isolation level over READ COMMITTED SNAPSHOT in SQL Server? I understand that in most cases READ COMMITTED SNAPSHOT works, but not sure when go for SNAPSHOT isolation. Thanks 回答1: READ COMMITTED SNAPSHOT does optimistic reads and pessimistic writes. In contrast, SNAPSHOT does optimistic reads and optimistic writes. Microsoft recommends READ COMMITTED SNAPSHOT for most apps that need row versioning. Read this excellent Microsoft

Maven Snapshot Repository vs Release Repository

由 谁说我不能喝 提交于 2019-11-26 19:13:20
问题 What is the difference between a Snapshot Repository and Release Repository? This is with reference to setting up Repositories (like Artifactory, Nexus etc) 回答1: Release Artifacts These are specific, point-in-time releases. Released artifacts are considered to be solid, stable, and perpetual in order to guarantee that builds which depend upon them are repeatable over time. Released JAR artifacts are associated with PGP signatures and checksums verify both the authenticity and integrity of the

EC2 Can't resize volume after increasing size

由 馋奶兔 提交于 2019-11-26 17:53:29
问题 I have followed the steps for resizing an EC2 volume Stopped the instance Took a snapshot of the current volume Created a new volume out of the previous snapshot with a bigger size in the same region Deattached the old volume from the instance Attached the new volume to the instance at the same mount point Old volume was 5GB and the one I created is 100GB Now, when i restart the instance and run df -h I still see this Filesystem Size Used Avail Use% Mounted on /dev/xvde1 4.7G 3.5G 1021M 78% /

How to take a snapshot of HTML5-JavaScript-based video player?

由 耗尽温柔 提交于 2019-11-26 15:28:37
问题 Actually, i have a HTML5 page with JavaScript function that allow me to play a wmv video file. I need to take a snapshot when the video is playing (with pause or without) and saved in any image format JPG or BMP whatever. Any help will appreciate. Thank you. <!DOCTYPE HTML> <html> <head> <title>HTML5 video</title> <script type="text/javascript"> function checkPlay() { var myVideo = document.getElementById("myVid"); var ytStr = '<iframe width="500" height="500" src="C:\XA0002.wmv" frameborder=

Snapshot of an WPF Canvas Area using RenderTargetBitmap

由 好久不见. 提交于 2019-11-26 14:46:20
问题 I want to create a Snapshot of the Canvas Area in my Application. I'm using Visual brush to get the Snapshot and saving the same using PngEncoder. But the resulting PNG is just a empty black image. I'm not sure the issue is with the BitmapSource created or the PNGEncoder issue. Here is the code I'm using to obtain the same. public void ConvertToBitmapSource(UIElement element) { var target = new RenderTargetBitmap((int)(element.RenderSize.Width), (int)(element.RenderSize.Height), 96, 96,
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