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Questions tagged [video-capture]

Questions related to computer oriented video capture and the programming tools and solutions for dealing with captured frames from a video.

2460 questions
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Pause & resume video capture for same file with AVFoundation in iOS

I'm trying to figure out how I can implement functionality to repeatedly pause and resume video capture in a single session, but have each new segment (the captured segments after each pause) added to the same video file, with AVFoundation. …
Daniel McCarthy
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Rotate VideoCapture in OpenCV on Android

How to rotate the camera when using class VideoCapture on OpenCV? (Sample Face Detection on Android). I'm rotating the canvas with: if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { Matrix matrix = new…
user1755546
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Android: How to initialize MediaRecorder without a valid surface for video preview?

I am building a camera app, where videos are continuously being captured and saved to the SD card. The videos are short (few minutes), and their length are preset with setMaxDuration(). The whole process works fine, while the main activity is in the…
Robert
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How to extract slides from a video using python

I have a video training course supplied as AVI files. Most of the screens are shown as slides with a mouse pointer moving around on them. I'd like to capture a screenshot of the slide automatically when the screen changes (ignoring when the image…
zio
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Cross-Platform webcam access

I'm looking for a cross-platform video capture library, for webcam access. One that wraps V4L/V4L2 on Linux, DirectShow on Windows, and QuickTime on the Mac. C or C++ is preferred, but I can work in Java or Python if those have better options for…
Branan
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blackmagic SDK in c#

i am attempting to capture 720p from one a blackmagic intensity pro cards using the newest SDK (june 2011) on windows7 64x and with C# + VS 2010 express. i have successfully compiled and run a program that captures frames at YUV however, capture…
morishuz
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Create Video File using PHP

I have scenario for creating a video files using diff. assets like images, audio file. What I want to do is, Find audio files from the particular folder and set it as background music, and fetch images from particular folder and show those images…
Avinash
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How to check whether Android MediaCodec supports Constant Quality mode

I have a screen recording app that uses a MediaCodec encoder to encode the video frames. Here's one way I retrieve the video-encoder: videoCodec = MediaCodec.createEncoderByType(MediaFormat.MIMETYPE_VIDEO_AVC); I then try to determine the best…
Piet
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Recommendation for screen video capture for demos

I am just in the process of making some little demo tutorial videos for my app to help users get up to speed. I have used Camtasia in the past but don't really like it. Anyone have any recommendations. Good is more important than free, but free…
Simon
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Does the StereoBM class in opencv do rectification of the input images or frames?

I am using the SteroBM class for a stereo vision as part of my project. I am taking the input frames from 2 Web cams and running the Stereo block matching computation on the input frames gray scale frames without rectification. The output I am…
Eswar
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Flash webcam/microphone capture with open-source media server

A media server is required for capturing video from Flash but none of them seem to have any documentation available (not even API docs or other source code comments). I would prefer crtmpserver because my application is written in C++ and it needs…
Tronic
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Saving video with overlay of GIF image

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…
Jitendra Modi
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C++ OpenCV 2.4.11: List all cameras

I want to list all connected webcams (USB-webcams and internal webcams), using C++, OpenCV 2.4.11, Windows 8.1 and Qt Creator 3.4.2. For me it is enough to get the number of accessible webcams in the following way: VideoCapture videoCapture(0); //…
Loomis
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audio and video recording errors in android

I need to record audio and video files to the 3gp/mp4 format in the same file and at the same time. When I run, my application file is created with videofile.3gp but the video does not record to the SD card on the emulator. Does video record on the…
pmms
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ALSA buffer xrun induced by low quality source in ffmpeg capture

I am attempting to transfer some old Video 8 tapes to my computer, though an EasyCap USB stick and the motherboard's sound line-in, on Ubuntu. I believe the arguments are correctly laid out below to capture from two independent streams, and encode…
Peter Becich
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