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• Recursively running ffmpeg concat script in bash across multiple folders

  15 août 2022, par Sam Feldman

  I wrote a bash script that concatenates all video files in a folder using ffmpeg. I would like to be able to run this script recursively on multiple folders. My problem has been that I am unable to change into the directory of every new folder to run the script. This is required for my script to work. Does anyone know what I could accomplish this ?

  


      #!/bin/bash

for f in *; do echo "file '$f'" >> files.txt; done
for f in *; do echo "'$f'" >> filesdelete.txt; done
ffmpeg -f concat -safe 0 -i files.txt -c copy "${PWD##*/}".MP4
xargs -I{} rm -r "{}" < filesdelete.txt
rm files.txt
rm filesdelete.txt


  


  I start with the file structure below. The script runs in each subdirectory (dir1, dir2, dir3) and combines the files in each subdirectory into one video. For the script to run, it needs to cd into each directory.

  


  root
├── dir1
│   ├── video1.mp4
│   ├── video2.mp4
│   └── video3.mp4
├── dir2
│   ├── video1.mp4
│   └── video2.mp4
└── dir3
    ├── video1.mp4
    └── video2.mp4


  


  The end result should look like the structure below.

  


  root
├── dir1
│   └── concat.mp4
├── dir2
│   └── concat.mp4
└── dir3
    └── concat.mp4


  


• "Cannot find ffmpeg" error when using 'audioconcat'

  2 janvier 2020, par Mosukoshide

  I would like to concatenate three ’.oga’ sound files using audioconcat, however whenever I try to do so, I am met with this error :

  Error: Error: Cannot find ffmpeg
  
      at /root/user/node_modules/fluent-ffmpeg/lib/processor.js:136:22
  
      at /root/user/node_modules/fluent-ffmpeg/lib/capabilities.js:123:9
  
      at /root/user/node_modules/fluent-ffmpeg/lib/capabilities.js:116:11
  
      at /root/user/node_modules/fluent-ffmpeg/lib/utils.js:223:16
  
      at F (/root/user/node_modules/which/which.js:68:16)
  
      at E (/root/user/node_modules/which/which.js:80:29)
  
      at /root/user/node_modules/which/which.js:89:16
  
      at /root/user/node_modules/isexe/index.js:42:5
  
      at /root/user/node_modules/isexe/mode.js:8:5
  
      at FSReqWrap.oncomplete (fs.js:152:21)
  
  ffmpeg stderr: undefined

  I have already installed ffmpeg with the flags that were listed on the audioconcat npm page like this :

  npm i ffmpeg --enable-libass --enable-libmp3lame

  And the code I am trying to run looks like this :

                  audioconcat(audioFiles)
  
                  .concat(`main.oga`)
  
                  .on('start', function (command) {
  
                    console.log('ffmpeg process started:', command)
  
                  })
  
                  .on('error', function (err, stdout, stderr) {
  
                    console.error('Error:', err)
  
                    console.error('ffmpeg stderr:', stderr)
  
                  })
  
                  .on('end', function (output) {
  
                    console.error('Audio created in:', output)
  
                  })

  I’m not sure how to fix this problem...

• Convert from webm to gif using FFMPEG with minimal loss in quality

  27 novembre 2017, par Neo Herakles

  so I want to convert all my webm files to gif but the quality degraded incredibly, there’s some barely visible lines along the picture, tried using crf to improve it but it doesn’t, could you help me ? Here’s my code :

  @echo off
  
  setlocal
  
  for %%G in ("%~dp0\webm\*.webm") do (
  
      ffmpeg -i "%%G" -pix_fmt rgb24 -crf 17 "%%G.gif"
  
      )
  
  )
  
  endlocal
  
  pause

  Also, could you instruct me in a way in which I can remove the .webm from the output filename ? it outputs as "(file name).webm.gif"