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• How can I convert all video type to flv video type by using ffmpeg in c# ?

  7 septembre 2012, par user1575609

  This is part of my C# code.

   if (fileExt != ".flv") {// file extension 
  
   string SaveADDConvertVideo = Server.MapPath("~/videoFile/Video/") + filename;

  ffmpeg.StartInfo.Arguments = " -i " + video + " -ar 22050 -ab 32 -f flv -s 320×240 " + SaveADDConvertVideo + ".flv" ;

    ffmpeg.StartInfo.FileName = Server.MapPath("ffmpeg.exe");
  
    ffmpeg.Start(); 

  }

  I want to convert any video format to .flv format.
  But this code doesn't work.
  I also debug my code very well and there isn't any error.
  Can any one help me ?
  Tq very much :)

• Checking if IP Camera is connected or not with cv2 faster ?

  15 novembre 2022, par Barış Aktaş

  I have code that works on 2 IP Cameras but before running my main algorithm I would like to check if my IP Cameras are connected or not. I wrote this code and i have used it before with 2 USB cameras now i am having a problem with IP Cameras.

  


  import cv2 

def check_connnections():
    #Check cam1
    cam1_ok = False    
    cam1 = cv2.VideoCapture('rtsp://admin:Tom12345.@192.168.0.33:554/onvif1') 
    if cam1.isOpened():
        cam1_ok = True

    #Check cam2
    cam2_ok = False
    cam2 = cv2.VideoCapture('rtsp://admin:Tom12345.@192.168.0.33:554/onvif1') 
    if cam2.isOpened():
        cam2_ok = True

    print(f'Cam1 Connection Status: {cam1_ok}')
    print(f'Cam2 Connection Status: {cam2_ok}')


check_connnections()


  


  Now if i plug the cameras i get :
Cam1 Connection Status: True , Cam2 Connection Status: True and when i unplug the cameras i expect Cam1 Connection Status: False , Cam2 Connection Status: False but it takes 3 minutes for cv2.VideoCapture() function to finish and return Falseif the IP cameras are not connected while it runs instantly for USB cameras. Is there a faster way to check this ?

  


  I tried same thing with USB Cameras, i also tried try:... except:pass but i couldn't find i way.

  


• FFmpeg Error Checking : Broken or missing AVI Index

  17 avril 2017, par Jake

  I have three example videos, good.avi, damaged1.avi, and damaged2.avi. The first will play in VLC, but the second two both error with the same "Broken or missing AVI Index" message.

  I have thousands of these videos which I need to process in MATLAB, so I’m trying to error check using FFmpeg like this : ffmpeg -v error -i vidname.avi -f null - 2>&1

  Now here’s the part I don’t understand :
  On good.avi it completes with no output -OK
  On damaged1.avi it outputs [mjpeg @ 0x7fc1dd813800] overread 1 -OK
  On damaged2.avi it completed with no output as in good.avi - ?????

  Would someone with video codec/FFmpeg experience please help me understand what’s going on here so I can develop a more robust error check ?

  They also both have identical codec details in VLC :