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• FFmpeg script skips files

  23 janvier 2020, par ucq52ose

  I wrote a shell script to convert many video files and save them with something appended to the file name. The script works, but it seems to randomly skip files, and a lot of them.

  When I re-run the script, it will convert files it skipped before. How can I get it to stop skipping files ?

  workingDir=/home/user/Videos
  
  
  
  # get list of files to convert
  
  find /video/folder -iname "*.mp4" > $workingDir/file_list
  
  
  
  # convert files
  
  cat $workingDir/file_list | while read LINE; do
  
      # FFmpeg often cuts off the beginning of this line
  
      echo "$(dirname "$LINE")/$(basename "$LINE")"
  
      if /usr/bin/ffmpeg -n -loglevel panic -v quiet -stats -i "$LINE" \
  
          -c:v libx264 -vf scale="trunc(oh*a/2)*2:320" \
  
          -pix_fmt yuv420p -preset:v slow -profile:v main -tune:v animation -crf 23 \
  
          "$(dirname "$LINE")/$(basename "$LINE" \.mp4)"_reencoded.mp4 2>/dev/null; then
  
              echo "Success: $(dirname "$LINE")/$(basename "$LINE")" >> $workingDir/results
  
      else
  
          echo "Failed:  $(dirname "$LINE")/$(basename "$LINE")" >> $workingDir/results
  
      fi
  
  done

  One problem seems to be that FFmpeg interferes with the script. The FFmpeg output often cuts off the beginning of the next command, even if the output is not shown. This is demonstrated by the echo line before the if statement, which is often cut off. But even for lines that aren’t cut off, most of them will be skipped for no apparent reason.

• 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


  


• Videos which is only played by particular app, need help to save it

  19 septembre 2015, par Kumar

  There’s a app(i can’t disclose the app name) which plays video stored in memory card and videos have no extension, by viewing the file sizes im assuming that they are the videos + I also check changing the extension with mp4 flv 3gp etc but no success. I then decompiled the app and saw that app is using ffmpeg-jni to play the videos. Anybody can help me in this ? and yeah all videos have IGN in their meta tag.

  Thanks