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• GLIBCXX_3.4.9 not found when running ffmpeg from php in lampp server

  13 mai 2016, par Rafaf Tahsin

  I’ve written a php program which creates a video from sequence of images using ffmpeg.

  <?php
  
      $res = shell_exec("ffmpeg -framerate 50 -i image/image%d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 2>&1");
  
      echo "$res";

  When I run it,

  it says GLIBCXX_3.4.15 , GLIBCXX_3.4.9 , GLIBCXX_3.4.11 not found.

  ffmpeg : /opt/lampp/lib/libstdc++.so.6 : version `GLIBCXX_3.4.15’ not

  found (required by /usr/lib/i386-linux-gnu/libjack.so.0) ffmpeg :

  /opt/lampp/lib/libstdc++.so.6 : version `GLIBCXX_3.4.9’ not found

  (required by /usr/lib/i386-linux-gnu/libzmq.so.3) ffmpeg :

  /opt/lampp/lib/libstdc++.so.6 : version `GLIBCXX_3.4.11’ not found

  (required by /usr/lib/i386-linux-gnu/libopencv_core.so.2.4) ffmpeg :

  /opt/lampp/lib/libstdc++.so.6 : version `GLIBCXX_3.4.9’ not found

  (required by /usr/lib/i386-linux-gnu/libopencv_core.so.2.4)

  But from the terminal, ffmpeg -framerate 50 -i image/image%d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 command works fine. Why php can’t find the libraries while from the terminal it works fine ? and what should I do to fix the problem in php ? Thanks in advance.

• How to share video stream to WSL2 while ffmpeg ? [closed]

  27 octobre 2024, par 笑先生

  Most solutions for using a camera in WSL are to build your own WSL kernel. I have realized it with the steps mentioned in Capturing webcam video with OpenCV in WSL2

  


  However, it's complicated and time-consuming. I want to realize it by sharing video streaming.

  


  Share method

  


  Step1 : Run the command below on Windows to check all the camera devices. I see an integrated camera "Integrated Webcam" (video) in the output.

  


  ffmpeg -list_devices true -f dshow -i dummy


  


  Step2 : Check the IP of Ethernet adapter vEthernet (WSL). In my computer, it's 172.24.176.1

  


  Step3 : Run the command below on Windows to share video streaming.

  


  ffmpeg -f dshow -i video="Integrated Webcam" -preset ultrafast -tune zerolatency -vcodec libx264 -f mpegts udp://172.24.176.1:5000


  


  Test

  


  Run the command to play the video streaming : ffplay udp://172.24.176.1:5000

  


  It can show the video when the command is run with a terminal of Windows (Win10).

  


  But, it cannot show anything when the command is run on with a terminal of WSL (Ubuntu 22.04). Why ?

  


• Seeing Blank video when using Xvfb with ffmpeg in headless mode

  4 avril 2022, par sxg

  Seeing blank video while running protractor tests in headless mode using Xvfb, ffmpeg, protractor video reporter

  



  I am using protractor framework for running automation tests. I am using protractor video recorder tool to record video on headless mode. The prerequisite for that is to start Xvfb at the background.

  



  This the setting i am using to run test in headless mode.
Steps followed to enable video in headless mode :

  



  Installed "npm i protractor-video-reporter"
Included ffmpeg setting for docker/linux.
```
 var VideoReporter = require('protractor-video-reporter');
 jasmine.getEnv().addReporter(new VideoReporter({
    baseDirectory: 'reports/videos',
    singleVideo: false,
    saveSuccessVideos: true,
    ffmpegCmd: '/usr/bin/ffmpeg',
    ffmpegArgs: [
      '-y',
      '-r', '30',
      '-f', 'x11grab',
      '-s', '1280x1024',
      '-i', 'process.env.DISPLAY',
      '-g', '300',
      '-vcodec', 'mpeg4'
    ]
  }));


  



      Executed "Xvfb :99 -ac -screen 5 1024x768x8 -listen tcp &" in a terminal
    Executed ```
       DISPLAY=:99  
       export $DISPLAY
``` in a separate window 
    Executed "env DEBUG=protractor-video-reporter protractor conf.js" in a separate terminal

Expected Result:

A video with the recordings that runs tests on google chrome

Actual Result:

Video is getting created but the video appears to be blank.

Chrome Version:73
Chromedriver Version: 2.46
Protractor version:5.4.2