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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


  


• unable ti decode video using h264_cuvid

  1er novembre 2017, par aymen

  I am using nvidia GTX 1080Ti, Driver Version : 387.12 .

  I am using the below command :

  ffmpeg -c:v h264_cuvid -i http://stream:port/channel output.mkv 

  And getting the following output :

  ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  
    configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --extra-cflags=-I/usr/local/cuda-8.0/include --extra-ldflags=-L/usr/local/cuda-8.0/lib64 --bindir=/root/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-cuda --enable-cuvid --enable-nvenc --enable-libnpp
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  [h264 @ 0x24d2f60] non-existing PPS 2 referenced
  
  [h264 @ 0x24d2f60] non-existing PPS 1 referenced
  
  [h264 @ 0x24d2f60] Invalid NAL unit 0, skipping.
  
      Last message repeated 2 times
  
  [h264 @ 0x24d2f60] slice type 12 too large at 1
  
  [h264 @ 0x24d2f60] decode_slice_header error
  
  [h264 @ 0x24d2f60] data partitioning is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
  
  [h264 @ 0x24d2f60] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
  
  [h264 @ 0x24d2f60] data partitioning is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
  
  [h264 @ 0x24d2f60] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
  
  [h264 @ 0x24d2f60] data partitioning is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
  
  [h264 @ 0x24d2f60] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
  
  [h264 @ 0x24d2f60] no frame!
  
  [h264 @ 0x24d2f60] non-existing PPS 1 referenced
  
  [h264 @ 0x24d2f60] decode_slice_header error
  
  [h264 @ 0x24d2f60] no frame!
  
  [h264 @ 0x24d2f60] SEI type 66 size 1104 truncated at 400
  
  [h264 @ 0x24d2f60] sps_id 1 out of range
  
  [h264 @ 0x24d2f60] non-existing PPS 3 referenced
  
  [h264 @ 0x24d2f60] non-existing PPS 2 referenced
  
  [h264 @ 0x24d2f60] non-existing PPS 1 referenced
  
  [h264 @ 0x24d2f60] SEI type 87 size 1264 truncated at 1224
  
  [h264 @ 0x24d2f60] sps_id 1 out of range
  
  [h264 @ 0x24d2f60] non-existing PPS 3 referenced
  
  [h264 @ 0x24d2f60] Invalid NAL unit 0, skipping.
  
   ........
  
  
  
  [h264 @ 0x24d2f60] non-existing PPS 0 referenced
  
  [h264 @ 0x24d2f60] decode_slice_header error
  
  [h264 @ 0x24d2f60] no frame!
  
  [mpegts @ 0x24c4640] decoding for stream 0 failed
  
  Input #0, mpegts, from 'http://stream:port/channel':
  
    Duration: N/A, start: 27359.989822, bitrate: N/A
  
    Program 1108
  
      Stream #0:0[0x3f2]: Video: h264 ([2][0][0][0] / 0x0002), yuv420p(bottom first), 46x24, 0.69 fps, 25 tbr, 90k tbn, 1.38 tbc
  
      Stream #0:1[0x3f3](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
  
  File 'output.mkv' already exists. Overwrite ? [y/N] 

  Do you have any idea about this problem ?

• a command in a script doesn't work when the script is launched by cron

  5 mai 2023, par a k

  When I launch the script manually both as a not-root user (with sudo) and as the root, everything work correctly.
When Cron (Cron of the root) launches it, ffmpeg doesn't work (but the others lines of the script work correctly).

  


  #!/bin/bash
log=/var/log/log2/log2.txt

echo ______________ $(date) >> "$log"
echo -n whoami '         ' >> "$log" ; whoami >> "$log"
echo -n pwd '            ' >> "$log" ; pwd >> "$log"
echo "$""USER" = '        ' "$USER" >> "$log"
echo PATH '          ' $PATH >> "$log"
echo -n which ffmpeg '   ' >> "$log" ; which ffmpeg >> "$log"
echo -n whereis ffmpeg ' ' >> "$log" ; whereis ffmpeg >> "$log"

echo "" >> "$log"
echo ls -l "/bin/* | grep ffmpeg" '        ' >> "$log"
ls -l /bin/* | grep ffmpeg >> "$log"

echo "" >> "$log"
echo ls -l "/usr/bin/* | grep ffmpeg" ' '>> "$log"
ls -l /usr/bin/* | grep ffmpeg >> "$log"

echo "" >> "$log"
echo ls -l "/var/log | grep log2" ' '>> "$log"
ls -l /var/log | grep log2 >> "$log"

echo "" >> "$log"
echo ls -l "/var | grep log" ' '>> "$log"
ls -l /var | grep log >> "$log"

ffmpeg -y -f x11grab -s 1366x768 -i :0.0 /var/log/log2/test.mp4 2>/dev/null &
echo "$!"
sleep 5
kill "$!"
exit


  


  The script puts in the file /var/log/log2/log2.txt :

  


  whoami          root
pwd             /root
$USER =          
PATH            /usr/bin:/bin
which ffmpeg    /usr/bin/ffmpeg
whereis ffmpeg  ffmpeg: /usr/bin/ffmpeg /usr/share/ffmpeg /usr/share/man/man1/ffmpeg.1.gz

ls -l /bin/* | grep ffmpeg         
-rwxr-xr-x 1 root   root      284976 mai   18  2022 /bin/ffmpeg

ls -l /usr/bin/* | grep ffmpeg  
-rwxr-xr-x 1 root   root      284976 mai   18  2022 /usr/bin/ffmpeg

ls -l /var/log | grep log2  
drwxrwxrwx  2 root              root               4096 mai    5 03:22 log2

ls -l /var | grep log  
drwxrwxr-x 16 root syslog   36864 mai    5 00:00 log


  


  I have tried to verify :

  


  

  • the permissions of the file ffmpeg

  


  • the permissions of the folder where ffmpeg writes to

  


  • the $PATH

  


  • the path of ffmpeg

  


  • the path of the file where ffmpeg should write to