To hide a Source temporarily, you can click the eye icon to hide the associated Source with it the eye will become greyed out. This can also be useful for situations where you want something on top of another source, like a webcam to show over your game play. You can re-align sources in the preview and change their order by using drag and drop in the list, or using the up and down arrow buttons.Ī Source that is listed above another Source in the list will be on top and might hide what's beneath it. Sources that are above others in the Sources list (Figure 1.1) are also located above other Sources in the preview. To remove a Source, select the Source in the Sources dock and click the - button. Whether it's a specific window, a capture card or game, image, text or your entire display that you want to capture, there are several different sources available in OBS Studio for you to choose from. From the Add Sources list (figure 1.2), you can choose a Source to add to your scene. To add a Source, click on the + button at the bottom of the Sources dock (figure 1.1). If VLC Media Player is installed, add a playlistĪdd customisable text to a source, including from a text fileĬapture a webcam, capture card, or other video device (including Blackmagic)Ĭapture a single window from your display on Windows, Linux, and macOS 12.6 and prior. On macOS 13, use macOS Screen CaptureĬapture hardware-accelerated games with high performance (Windows only on other platforms, use a Display, Window, or macOS Screen Capture SourceĪdd an image, or slideshow of images, to a sceneĬapture a display, window, or application - including desktop audio (macOS 13 and later)Īdd audio/video files to a scene. This is primarily used for stream alert overlays and chat boxesĬapture an entire display on Windows, Linux, and macOS 12.6 and prior. These are where you set up your stream layout, add your games, webcams, and any other devices or media that you want in the output.Ĭapture audio, including microphones, desktop audio, and application audioĪdd a web page to your scene. The below code captures from a camera, flips every frame in the vertical direction, and saves the video.Scenes and Sources are the meat of OBS Studio. In OSX: MJPG (.mp4), DIVX (.avi), X264 (.mkv).įourCC code is passed as ‘cv.VideoWriter_fourcc('M’,'J','P','G') or cv.VideoWriter_fourcc(*'MJPG')` for MJPG.In Windows: DIVX (More to be tested and added).In Fedora: DIVX, XVID, MJPG, X264, WMV1, WMV2.The list of available codes can be found in. If it is True, the encoder expect color frame, otherwise it works with grayscale frame.įourCC is a 4-byte code used to specify the video codec. Then number of frames per second (fps) and frame size should be passed. Then we should specify the FourCC code (details in next paragraph). We should specify the output file name (eg: output.avi). This time we create a VideoWriter object. For images, it is very simple: just use cv.imwrite(). So we capture a video and process it frame-by-frame, and we want to save that video.

Sometimes it is a headache to work with video capture, mostly due to wrong installation of ffmpeg/gstreamer. 25 milliseconds will be OK in normal cases.Ĭv.destroyAllWindows() Note Make sure a proper version of ffmpeg or gstreamer is installed. If it is too less, video will be very fast and if it is too high, video will be slow (Well, that is how you can display videos in slow motion). Also while displaying the frame, use appropriate time for cv.waitKey(). Playing video from file is the same as capturing it from camera, just change the camera index to a video file name. Note If you are getting an error, make sure your camera is working fine using any other camera application (like Cheese in Linux). Just use ret = cap.set( cv.CAP_PROP_FRAME_WIDTH,320) and ret = cap.set( cv.CAP_PROP_FRAME_HEIGHT,240). Value is the new value you want.įor example, I can check the frame width and height by cap.get( cv.CAP_PROP_FRAME_WIDTH) and cap.get( cv.CAP_PROP_FRAME_HEIGHT). Some of these values can be modified using cap.set(propId, value). Full details can be seen here: cv::VideoCapture::get(). Each number denotes a property of the video (if it is applicable to that video). You can also access some of the features of this video using cap.get(propId) method where propId is a number from 0 to 18. You can check whether it is initialized or not by the method cap.isOpened(). Sometimes, cap may not have initialized the capture. So you can check for the end of the video by checking this returned value. If the frame is read correctly, it will be True.

Converts an image from one color space to another.Ĭap.read() returns a bool ( True/ False).

Capture web page