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• PHP ffmpeg not found

  17 décembre 2020, par heisenberg

  so I already browse all the forum but I still get error "sh : 1 : /usr/bin/ffmpeg : not found".
If I run ffmpeg from terminal it works just fine and can do convert video without problem, but if I use PHP exec or shell_exec, the return always ffmpeg not found.

  


  this is my code :

  


  $cmd = "/usr/bin/ffmpeg";

$run = exec($cmd." -i 'linkvideo.m3u8' -bsf:a aac_adtstoasc -vcodec copy -c copy -crf 50 /test_stream/newfile.mp4 2>&1");

var_dump($run);


  


  if I run which ffmpeg or whereis ffmpeg from terminal it will return /usr/bin/ffmpeg, but if I exec('which ffmpeg') from my code it will return ffmpeg not found. I already chown and chmod the ffmpeg to grant rwx, i tried move ffmpeg to /usr/local/bin still same result. If i run whoami from terminal it will show root but if from my code using exec('whoami') it will show www-data so maybe I miss something about the user but I also already tried to chown ffmpeg from root to www-data still the result is ffmpeg not found, maybe anyone can help, I'm using codeigniter and already install ffmpeg in server using sudo apt-get ffmpeg, thanks before !

  


• Including ffmpeg in c program/application

  11 mars 2016, par user14598204

  I want to make a C program in which I want to directly use actual functions of ffmpeg. Right now I’m using ’system("ffmpeg command")’ to run ffmpeg
  command in my C program. This directly or indirectly executes in the terminal of my Ubuntu Linux. However this frequently opens terminal, runs the command and
  closes terminal. Thus multiple terminals are working at a time which is not a good solution.

  I want to include/embed ffmpeg command in my program so shtat I can directly access the actual fumctions which are defined in the ffmpeg source. I’m working
  on a C project in which I need to make a complete firmware which runs this single program so that I don’t have to rely on the multiple terminals and can call the
  function directly.

  So how can I achieve my goal to integrate/embed/include ffmpeg in my C program ?
  Any useful links, suggestions are gratey appreciated.

• Reading images from AXIS ip camera using OpenCV

  14 juin 2016, par batuman

  I am trying to access AXIS IP camera from my program using OpenCV.
  My OpenCV version is 3.1. I follow this tutorial link.

  I have all libraries installed.
  My following program can load mp4 video successfully. That means ffmpeg and necessary libraries are working fine.

  #include <iostream>
  
  #include <opencv2></opencv2>opencv.hpp>
  
  
  
  using namespace std;
  
  int main() {
  
      cv::VideoCapture vcap("test.mp4");
  
      cv::Mat image;
  
  //    const string address = "rtsp://root:pass@192.168.0.90/axis-media/media.amp?camera=1";
  
  //    if(!vcap.open(address)){
  
  //      std::cout &lt;&lt; "Error opening video stream or file " &lt;&lt; std::endl;
  
  //      return -1;
  
  //    }
  
      for(;;){
  
          if(!vcap.read(image)){
  
              std::cout &lt;&lt; "No frame" &lt;&lt; std::endl;
  
              cv::waitKey(0);
  
          }
  
          cv::imshow("Display", image);
  
          cv::waitKey(1);
  
      }
  
      return 0;
  
  }
  
  </iostream>

  When I tried to access the IP Camera as follow

  cv::VideoCapture vcap("rtsp://root:pass@192.168.0.90/axis-media/media.amp?camera=1");

  I have the following error

  GStreamer Plugin: Embedded video playback halted; module source reported: Could 
  
  not open resource for reading and writing.
  
  OpenCV Error: Unspecified error (GStreamer: unable to start pipeline
  
  ) in cvCaptureFromCAM_GStreamer, file /home/Softwares/opencv/opencv/modules
  
  /videoio/src/cap_gstreamer.cpp, line 818
  
  terminate called after throwing an instance of 'cv::Exception'
  
    what():  /home/Softwares/opencv/opencv/modules/videoio/src/cap_gstreamer.
  
  cpp:818: error: (-2) GStreamer: unable to start pipeline
  
   in function cvCaptureFromCAM_GStreamer

  User is root and password is pass and ip 192.168.0.90 are all defaults.

  My if config gave me

  ifconfig
  
  eth0      Link encap:Ethernet  HWaddr b8:2a:72:c6:b8:13  
  
            inet6 addr: fe80::ba2a:72ff:fec6:b813/64 Scope:Link
  
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  
            RX packets:723959 errors:0 dropped:0 overruns:0 frame:0
  
            TX packets:116637 errors:0 dropped:0 overruns:0 carrier:0
  
            collisions:0 txqueuelen:1000 
  
            RX bytes:199422245 (199.4 MB)  TX bytes:13701699 (13.7 MB)
  
  
  
  lo        Link encap:Local Loopback  
  
            inet addr:127.0.0.1  Mask:255.0.0.0
  
            inet6 addr: ::1/128 Scope:Host
  
            UP LOOPBACK RUNNING  MTU:65536  Metric:1
  
            RX packets:24829 errors:0 dropped:0 overruns:0 frame:0
  
            TX packets:24829 errors:0 dropped:0 overruns:0 carrier:0
  
            collisions:0 txqueuelen:0 
  
            RX bytes:2502903 (2.5 MB)  TX bytes:2502903 (2.5 MB)
  
  
  
  wlan0     Link encap:Ethernet  HWaddr a0:a8:cd:99:92:60  
  
            UP BROADCAST MULTICAST  MTU:1500  Metric:1
  
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
  
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
  
            collisions:0 txqueuelen:1000 
  
            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

  What could be the problem for this access to the camera ?

  Thanks