Recherche avancée

Sur d’autres sites (5152)

• Bash script doesn't read entire line

  4 octobre 2019, par Miguel Alatorre

  First off, I am in the early stages of learning bash shell scripting, so I apologize if I say / do anything that doesn’t make sense.

  Currently, I’m trying to have an SBC, a Khadas VIM3 specifically, run a python script to find and label faces in any given video from a local server. Currently, I need to reduce the frame rate and resolution of the video, which is where the bash script comes into play. I need to automate this process and thought I’d do it using a bash script and crontab.
  The file paths are found and output into a file from a separate script, and are read by the bash script. The problem comes when I try and call ffmpeg to use the file paths.

  The Code :

  pathFile="/home/khadas/Documents/paths"
  
  
  
  while IFS= read -r line
  
  do
  
          ffmpeg -i "$line" -vf scale=960:540 -y "$line"
  
          cp "$line" ./
  
  done < $pathFile

  The resulting error :

  : No such file or directoryalRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4
  
  cp: cannot stat '/home/khadas/Downloads/FacialRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4'$'\r': No such file or directory

  Example of the paths file (There will be hundreds of entries) :

  /home/khadas/Downloads/FacialRecognition/10/14-42.h264+/20-509-26-10-14-42.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/59-06.h264+/20-509-26-10-59-06.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/36-28.h264+/20-509-26-10-36-28.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4

  When using a trimmed down version, the script works as expected. Could it be an issue with the length of the lines ? Any help is much appreciated.

• Java execute command doesn't work in code

  27 août 2017, par Ariana

  I am calling java.lang.Runtime.exec(...) in my Java program to run a command (some FFMPEG commands) simply passed to my function :

      private static void RunCommand(String command) throws InterruptedException {
  
          try {
  
              // Execute command
  
              Process proc = Runtime.getRuntime().exec(command);
  
  }
  
  }

  It runs OK for simple FFMPEG cases such as ffmpeg -i input.avi -c copy output.avi.

  But for one of the commands, apparently it doesn’t run. When I copy/paste the exact String in command line, I am able to run it and see the output file.

  ffmpeg -i "concat:/home/temp10.avi|/home/p2.avi|/home/temp15.avi" -c copy -y /home/output.avi

  Which is the following in code :

  String c4="ffmpeg -i \"concat:"+dir+temp1+"|"+dir+ad+"|"+dir+temp3+"\" -c copy -y "+dir+output;

  What is going on ? Any guesses why it doesn’t run in code ? If the " is causing the problem, why the corresponding string looks good ?!

• create single video form 3 separate videos using FFmpeg

  24 septembre 2019, par Shijin

  I was trying to create single video form 3 separate videos using FFmpeg.

  ffmpeg -y -loglevel debug  -i /home/ubuntu/test/1569317318/15693173181124138568.webm   -i /home/ubuntu/test/1569317318/1569317318867082351.webm   -i /home/ubuntu/test/1569317318/1569317318191333163.webm  -filter_complex '[0]scale=320:-1[a];[1]scale=320:-1[b];[2]scale=320:-1[c];[3]scale=320:-1[d];[a]pad=640:480[x];[x][b]overlay=320[y];[y][c]overlay=0:240[z];[z][d]overlay=320:240;[0][1]amix'  -c:v libx264   -crf 23   -preset veryfast   -shortest   /home/ubuntu/test/1569317318/1569317318478598265.mp4

  This is not woking, It throws an error like bellow

  Invalid file index 3 in filtergraph description
  [0]scale=320 :-1[a] ;[1]scale=320 :-1[b] ;[2]scale=320 :-1[c] ;[3]scale=320 :-1[d] ;[a]pad=640:480[x] ;[x][b]overlay=320[y] ;[y][c]overlay=0:240[z] ;[z][d]overlay=320:240 ;[0][1]amix.

  How to fix it ? If we provide four inputs, It is working