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. "CLPL YUV Format similar to YV12 but including a level of () returns a bool ( True/ False). "CLJR YUV Cirrus Logic Less than 8 bits per Y, U and V sample. "CJPG JPEG Creative Creative Video Blaster Webcam Go JPEG YUV \n " "CHAM Champagne Winnov Caviara Champagne \n " "CGDI Camcorder Camcorder Video (MS Office 97) \n " "CFHD CineForm CineForm 10-bit Visually Perfect HD (Wavelet) \n " "CFCC JPEG DPS Perception Dummy format - only AVI header YUV \n " "CDVH DV Canopus Canopus SD50/DVHD YUV \n " "CDVC DV Canopus Canopus DV (DV) YUV \n " "CDV5 DV Canopus Canopus SD50/DVHD YUV \n " "BW10 MPEG-1 Broadway Data Translation Broadway MPEG Capture/Compression YUV \n " "BTVC Composite Conexant Composite Video \n " "BTCV Composite Conexant Composite Video \n " "BT20 MediaStream Conexant ProSummer MediaStream \n " "BLZ0 MPEG-4 Visual DivX DivX for Blizzard Decoder Filter YUV 4:2:0 \n " "AVUP Avid Avid 10bit Packed (Quick Time) \n " "AVUI Avid Avid Meridien Uncompressed with Alpha-channel \n " "AVR JPEG Avid NuVista Avid ABVB/NuVista JPEG with Alpha-channel YUV \n " "AVIS AviSynth Wrapper for AviSynth (Dummy) \n " "AURA YUV Auravision Aura 1 YUV 4:1:1 \n " "AUR2 YUV Auravision Aura 2 YUV 4:2:2 \n " "AP42 MPEG-4 Visual AngelPotion Hack of MS MPEG-4 v3 YUV 4:2:0 \n " "AP41 MPEG-4 Visual AngelPotion Hack of MS MPEG-4 v3 YUV 4:2:0 \n " "AMV3 AMV3 AMV3 Video Codec Version 3 YUV 4:2:0 \n " "AMM2 AMV2 MT AMV2 MT Video Codec Version 2 \n " "ALPH Ziracom Ziracom Digital Communications Inc. "AJPG JPEG 22fps for digital cameras YUV \n " "AEMI MPEG Video VideoONE MPEG-1-I Capture YUV 4:2:0 \n " "ABYR Kensigton low Kensington Low resolution, low frame rate (6fps) for digital cameras \n " "2VUY YUV Optibase VideoPump YUV 4:2:2 \n " Packing and precision of R, G and B components is determined by bit masks for each \n " "0x00000003 RGB Raw RGB with arbitrary sample packing within a pixel. "0x00000002 RLE Run length encoded 4bpp RGB image \n " "0x00000001 RLE Run length encoded 8bpp RGB image \n " 16, 24 and 32bpp contain raw RGB samples \n " "0x00000000 RGB Basic Windows bitmap format. Void MediaInfo_Config_CodecID_Video_Riff (InfoMap
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