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• Getting Error with node-media-serve and ffmpeg in heroku

  1er juillet 2021, par Anurag Gautam

  I have created a MERN app with video streaming by using node-media-serve module, with following configuration

  


  trans: {
  ffmpeg: '/vendor/ffmpeg',
   tasks: [] ,
   .....
}


  


  In local I have installed ffmpeg in trans.ffmpeg. and its working fine, But how we need to install ffmpeg in heroku .

  


  I have tried by adding heroku buildpacks
heroku buildpacks:add https://github.com/jonathanong/heroku-buildpack-ffmpeg-latest.git but its showing me error. May be some issue with config only.

  


  Heroku error :
2020-09-16T11:23:54.292896+00:00 app[web.1]: 9/16/2020 11:23:54 23 [ERROR] Node Media Trans Server startup failed. ffmpeg:/vendor/ffmpeg cannot be executed.

  


  Guys can you please help me reslove this issue

  


• Bash script to convert imgs in subfolders to video (using ffmpeg and Ubuntu)

  2 novembre 2015, par mcExchange

  I’m trying to convert all files in folders given by

   allFolders.txt
  
  > head folderNames.txt
  
  0001 
  
  0002 
  
  0003 
  
  0004 
  
  0005 
  
  ...

  to a video using ffmpeg

  ffmpeg version 2.2.3 Copyright (c) 2000-2014 the FFmpeg developers  built on Apr 20 2015 13:38:52 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
  configuration: --prefix=/home/myUsername/usr/local --enable-nonfree --enable-gpl --enable-pic --enable-shared --enable-libx264 --disable-vaapi

  According to some answers here on stackoverflow I wrote the following bash script :

  #!/bin/bash
  
  while read p; do
  
      cd "$p"
  
      ffmpeg -f concat -i "allImgNames.txt" -framerate 30 -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p output.mp4
  
      cd -
  
  done < folderNames.txt

  where allImgNames.txt is a text file containing all the image names.

  The strange thing is that it works for a few videos but for the rest of the filelist it fails saying allImgNames.txt: No such file or directory, which is not true. I checked all paths several times. Also I can execute the ffmpeg ... command above manually without problems.
  I don’t know what I’m doing wrong. All file / folder names are normal (no special characters). Maybe I don’t understand enough about bash or ffmpeg.

• why ffmpeg is hanging with very high bitrate

  3 mai 2022, par vivek gupta

  Recently I wrote the code for ffmpeg, all was working fine, but randomly and frequently the ffmpeg just becomes very slow, sometimes it works with good speed.



  


  as you could see the number of frames is very huge, as well as bitrate is abnormally high.

  


  It seems strange as even though I provided the bitrate explicitly in the code, it is not being used :

  


  Following are the filters I'm using(the marked in red is drawtxt filter ) :


  


  Need someone's help to direct me to possible fix for this issue. I'm sorry I can't share the entire code. Please note the entire code is having roughly 17000+ characters.