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• How can I get all handles when I debug a MFC program with Visual Studio ?

  4 décembre 2024, par Goblet Machine

  I have a MFC program with FFMpeg to play video, but when I use the DirectX decoder, I found that every time I close the video, the handle count in Task Manager increases by 3 (sometimes the count decreases after a while, but overall it shows an upward trend).
I tried using WinDbg to capture the handles, but apart from these handles being called by the NVIDIA driver, there was no useful information. So I think maybe I can get more information in Visual Studio.

  


  Can anyone give some help ?

  


• Opening a video file from local drive as buffer and write it into new file

  19 avril 2017, par laslavinco

  I have multiple broken video files of one same video I need to join them together as one video again but when I tried this

  import os
  
  path = 'C:/temp/test'
  
  files = os.listdir(path)
  
  for file in files:
  
      mainFile = open('C:/temp/main.mp4','ab')
  
      with open(path+'/'+file,'rb') as read:
  
          print (read)
  
          mainFile.write(read)
  
  mainFile.close()

  It threw an Error saying

  TypeError: must be string or buffer, not file

  So I don’t know how do I make a video file buffer. I tried googling it and I found something called ffmpeg but it’s a third party app. All I need is buffer of a file.

• My webcam works fine, while using cv2.Videocapture() but while trying to read from hard drive it shows error cap.isOpened() returns false, why ?

  27 septembre 2017, par Hu Yang

  import cv2
  video_capture = cv2.VideoCapture("rtsp ://admin:Trust1986_@10.58.94.47:554/h264/ch1/main/av_stream")
  video_capture.isOpened()

  False

  Other information below here, and ffmpeg I had installed.

    Video I/O:
  
      DC1394 1.x:                  NO
  
      DC1394 2.x:                  NO
  
      FFMPEG:                      NO
  
        avcodec:                   NO
  
        avformat:                  NO
  
        avutil:                    NO
  
        swscale:                   NO
  
        avresample:                NO
  
      GStreamer:                   NO
  
      OpenNI:                      NO
  
      OpenNI PrimeSensor Modules:  NO
  
      OpenNI2:                     NO
  
      PvAPI:                       NO
  
      GigEVisionSDK:               NO
  
      Aravis SDK:                  NO
  
      UniCap:                      NO
  
      UniCap ucil:                 NO
  
      V4L/V4L2:                    NO/NO
  
      XIMEA:                       NO
  
      Xine:                        NO
  
      Intel Media SDK:             NO
  
      gPhoto2:                     NO
  
  
  
  root@ubuntu:/home/face_recognition/opencv/ffmpeg/ffmpeg-3.3.4# ffmpeg -version
  
  ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
  
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
  configuration: 
  
  libavutil      55. 58.100 / 55. 58.100
  
  libavcodec     57. 89.100 / 57. 89.100
  
  libavformat    57. 71.100 / 57. 71.100
  
  libavdevice    57.  6.100 / 57.  6.100
  
  libavfilter     6. 82.100 /  6. 82.100
  
  libswscale      4.  6.100 /  4.  6.100
  
  libswresample   2.  7.100 /  2.  7.100
  
  root@ubuntu:/home/face_recognition/opencv/ffmpeg/ffmpeg-3.3.4# 
  
  root@ubuntu:/home/face_recognition/opencv/ffmpeg/ffmpeg-3.3.4# python3.6m -V
  
  Python 3.6.2
  
  root@ubuntu:/home/face_recognition/opencv/ffmpeg/ffmpeg-3.3.4# pkg-config --modversion opencv  
  
  3.3.0

  what shall I do next step ? Thanks.