video-capture

问题 I'm using DirectShowNet in C#. I've been developing an application to work with webcams to display video, change resolution, and take pictures (either Still pin or from the Capture stream). I've been testing it on 2 different machines (Win 7 64-bit & Win 8 64-bit) and with the internal webcams on those machines (they are laptops) and 2 other webcams, Logitech C920 and Microsoft LifeCam Studio. One day, the LifeCam Studio stopped working on my Win 8 machine. Using GraphEditPlus, checking the

问题 I've managed to setup code for a Windows Phone 8 Application that initializes and can start/stop recording video using an AudioVideoCaptureDevice. (saves it to an IRandomAccessStream) //Initialize Camera Recording Windows.Foundation.Size resolution = new Windows.Foundation.Size(640, 480); captureDevice = await AudioVideoCaptureDevice.OpenAsync(CameraSensorLocation.Back, resolution); captureDevice.VideoEncodingFormat = CameraCaptureVideoFormat.H264; captureDevice.AudioEncodingFormat =

问题 I have been trying to generate animation files (.AVI files) in parallel remotely on a cluster via shell script with Matlab. So far this has been an impossible task. I have all but given up, and have just accepted that I will need to generate the animations on my laptop overnight for 8 hours or so. But I’m hoping that someone out there knows how to fix this, or that I can stop someone from wasting a day of trial and error. I have generated a large number of two dimensional probability

问题 I am getting video input from 2 separate cameras with some area of overlap between the output videos. I have tried out a code which combines the video output horizontally. Here is the link for that code: https://github.com/rajatsaxena/NeuroscienceLab/blob/master/positiontracking/combinevid.py To explain the problem visually: The red part shows the overlap region between two image frame. I need the output to look like the second image, with first frame in blue and second frame in green (as

问题 I am getting video input from 2 separate cameras with some area of overlap between the output videos. I have tried out a code which combines the video output horizontally. Here is the link for that code: https://github.com/rajatsaxena/NeuroscienceLab/blob/master/positiontracking/combinevid.py To explain the problem visually: The red part shows the overlap region between two image frame. I need the output to look like the second image, with first frame in blue and second frame in green (as

问题 May be it is so simple but I'm new to Matlab and not good in Timestamps issues in general. Sorry! I have two different cameras each contains timestamps of frames. I read them to two arrays TimestampsCam1 and TimestampsCam2: TimestampsCam1 contains 1500 records and the timestamps are in Microseconds as follows: 1 20931160389 2 20931180407 3 20931200603 4 20931220273 5 20931240360 ... and TimestampsCam2 contains 1000 records and the timestamps are in Milliseconds as follows: 1 28275280 2

问题 I am using a startech capture card for capturing video from the source machine..I have encoded that video using matlab so every frame of that video will contain that marker...I run that video on the source computer(HDMI out) connected via HDMI to my computer(HDMI IN) once i capture the frame as bitmap(1920*1080) i re-size it to 1280*720 i send it for processing , the processing code checks every pixel for that marker. The issue is my capture card is able to capture only at 1920*1080 where as

问题 I am using a startech capture card for capturing video from the source machine..I have encoded that video using matlab so every frame of that video will contain that marker...I run that video on the source computer(HDMI out) connected via HDMI to my computer(HDMI IN) once i capture the frame as bitmap(1920*1080) i re-size it to 1280*720 i send it for processing , the processing code checks every pixel for that marker. The issue is my capture card is able to capture only at 1920*1080 where as

问题 I am working on an application in which I record a video. When recording finished I put a GIF image on it with use of Library. My code for playing video and putting gif image as an overlay self.avPlayer = [AVPlayer playerWithURL:self.urlstring]; self.avPlayer.actionAtItemEnd = AVPlayerActionAtItemEndNone; AVPlayerLayer *videoLayer = [AVPlayerLayer playerLayerWithPlayer:self.avPlayer]; videoLayer.frame = self.preview_view.bounds; videoLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;

问题 I am looking for a video editing library in IOS. Editing tasks: -> Adding text or marks on top of the video frame. In my application user should be able to select a video from video library and also play the video in a movie player. And user able to pause the video then add some text or marks using free hand. we need to merge added text and marks in this video. 回答1: AVFoundation will do all that and more. The user interface for the app is, of course, up to you. But all the video manipulation