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• ffmpeg encoder issues in unreal engine 5 [closed]

  24 février 2024, par Tunç Bektaş

  When rendering to get an MP4 output in Unreal, I’m encountering an error like the one below. I’ve watched all the videos related to ffmpeg installation, but it’s not working.

  


  “Command Line Encoder : [concat @ 000001ecc90360c0] Line 1 : unknown keyword ‘ ?f’
C :/Users/bekta/OneDrive/Masaüstü/Unreal Engine/EnvironmentProject/Content/6E5E6A004F5560E6B5A669A7058645CD_input.txt : Invalid data found when processing input”

  


  enter image description here

  


  I did everything true I guess and I don't have "6E5E6A004F5560E6B5A669A7058645CD_input.txt" text file or I can't find it

  


• "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...

• 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