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• Disappearing modules of Node.js

  16 April 2019, by WearponiX

  My program needs some node.js modules, but when I install them manually - they disappear.

  I tried npm install ffmpeg-binaries and npm install decompress-tarxz, got a huge log full of errors. I tried to install them manually, then ran npm i and they disappeared from node_modules folder.

  https://pastebin.com/7kA7cNFM
  here is what I get in CMD after installing

  https://pastebin.com/7kUGNVYa
  and here is a full log

  Is there a way to install decompress-tarxz and ffmpeg-binaries?

  UPD:
  Solved that just by deleting package.json

• How To apply video filter for Opencv VideoCapture in C++

  23 February 2021, by 하형욱

  I am using ffmpeg command for recording movie from webcam Device

  


  ffmpeg -f dshow -i video="USB Video Device" -vf scale=in_range=full d:/video.mp4


  


  and I want to apply option openCV library in C++.
But I don't know apply "-vf scale=in_range=full" option in code. please help me

  


  cv::VideoCapture m_videoCapture;
m_videoCapture.open(3); // 3 is device ID = USB Video Device 
m_videoCapture.set(CV_CAP_PROP_FRAME_WIDTH, 1920);
m_videoCapture.set(CV_CAP_PROP_FRAME_HEIGHT, 1080);
m_videoCapture.set(CV_CAP_PROP_FPS, 30.00);
// Set vf(VideoFilter) here ? whow?
if (!m_videoCapture.isOpened())
{
    ::MessageBox(NULL, "WebCam Device could not be opened succesfully", "CAM", MB_OK);
    return false;
}
return true;

cv::Mat frame;
while (char(cv::waitKey(100)) != 'q')
{
    m_videoCapture >> frame;
    // shoud I write code here for applying videofilteR?

    if (frame.empty()) break;
}


  


• FFmpeg will not run from php

  15 March 2015, by user2392940

  This is a live server i am on a Windows 2008 Web Edition R2 server with IIS7.

  I have tried all of this locally and it works perfectly. At first i thought this may have been a permisson issue i gave all ffmpeg folders and output folders full control. I also checked the php ini file to make sure exec is enabled.

  I was intially running the exec() function i later changed it to the system() function to see what ffmpeg was outputting. With the system() function it returns the error "Acess is denied". All of my research points to a IIS setting or Application Pool not having the correct permission. Any help would be much appreciated.

  FFmpeg location: C:\ffmpeg\bin\ffmpeg.exe

  I have been working on this for nearly a week even my server provider has no answer on why ffmpeg will not run from php. I believe this is a little deeper than full paths. It’s obviously a permission problem but the question is where is the permission problem?

  It also seems that no .exe file can be executed from php.

  system ("$ffmpeg -i yourvideo/.mp4 -threads 1 -ss 20 -b 10k  -s 240x180 -vf fps=fps=1/20 -vframes 12 -aspect 4:3 thumbs/yourvideo/yourvideo.%01d.jpg 2>&1");