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• Shell Script - Issue while assigning command from shell script

  18 novembre 2013, par Simon

  I want to build a script for converting a set of .avi movies from a folder to .wmv movies by using the ffmpeg converter.

  My script has the following content :

  for file in *.avi
  
  do
  
  replace_string="wmw";
  
  new_file=${file/avi/$replace_string};
  
  #echo $new_file
  
  #echo $file
  
  ffmpeg -i $file -b:v 2500k /home/alin/WmvMovies/$new_file
  
  done

  However, it doesn't work. I receive the following error :

  [NULL @ 0x1849040] Unable to find a suitable output format for '/home/alin/WmvMovies/Teo_Pose90.wmw'
/home/alin/WmvMovies/Teo_Pose90.wmw: Invalid argument

  However, if I try this independently, it works. If I introduce into shell the following command :

  ffmpeg -i Teo_Pose90.avi -b:v 2500k /home/alin/WmvMovies/Teo_Pose90.wmv

  Can someone please explain to me why do I get this behaviour ?

• how do I only run ffmpeg if not currently running

  6 juin 2019, par RobertW

  I have a script that runs every 10 minutes which causes ffmpeg to run over and over and really slows it down. I’d like to only run one instance at a time so the movies will appear quicker on my website (And not crash my server).

  Here is my code :

  for i in MovieCategories/Category1/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  
  
  for i in MovieCategories/Category2/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category3/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category4/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  
  
  for i in MovieCategories/Category5/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category6/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category7/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  
  
  for i in MovieCategories/Category8/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category9/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category10/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  
  
  for i in MovieCategories/Category11/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done

  I attempted to consolidate them into one command to help a bit but for some reason it mismatched the names from different directories and failed. Overall my main goal is to only run one movie at a time. If you could help consolidate this that would be a bonus. The movies are listed as follow :

  MovieCategories/

  • Category1/

    • Movie1/
      • Movie1.mp4
    • Movie2/
      • Movie2.mkv
    • Movie3/
      • Movie3.mp4
  • Category2/
    • Movie4/
      • Movie4.mp4
    • Movie5/
      • Movie5.mkv
    • Movie6/
      • Movie6.mp4

  And on...

• Wowza RTMP to RTSP

  3 août 2016, par Nmas

  We’re using a Raspicam to stream live video to a client using Wowza Streaming Engine. We use FFMPEG to encode and send to Wowza and we can succesfully watch the RTMP stream using JWPlayer. This is the FFMPEG command used :

  ffmpeg -t 0 -s 320x240 -f video4linux2 -i /dev/video0 -b:v 250k -tune zerolatency -preset ultrafast -f flv -r 15 rtmp://wowzaaddress:1935/live/live

  To be able to watch the stream on mobile devices we want to use RTSP or HLS which Wowza provides links to, however when we use those links (provided on the Test Player) nothing happens and we can’t even open them to test for example in VLC. We have already added the extra ports on our web server to see if that was the problem and still didn’t work.
  Does anybody know what the problem is or what could we be doing wrong ?