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• 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

  


  


• Linux C Makefile (FFmpeg) undefined reference to `curl_easy_init'

  23 juillet 2015, par hoschi111

  I did some changes to /libavformat/concat.c in the FFmpeg source.
  There I included libcurl.

  Internet says I have to add the following code to ’Makefile’.

  INCLUDE = -I/usr/local/include
  
  LDFLAGS = -L/usr/local/lib
  
  LDLIBS = -lcurl

  That did not work.
  I use this to build FFmpeg :

  make clean && ./configure --prefix=/usr --enable-gpl --enable-libmp3lame --enable-libx264 && make -j 4

  Error :

  /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../lib/libavformat.a(concat.o): In function `concat_read':
  
  /root/ffmpeg_sources/ffmpeg/libavformat/concat.c:151: undefined reference to `curl_easy_init'
  
  /root/ffmpeg_sources/ffmpeg/libavformat/concat.c:155: undefined reference to `curl_easy_setopt'
  
  /root/ffmpeg_sources/ffmpeg/libavformat/concat.c:156: undefined reference to `curl_easy_perform'
  
  /root/ffmpeg_sources/ffmpeg/libavformat/concat.c:158: undefined reference to `curl_easy_getinfo'

  original Makefile :
  https://github.com/FFmpeg/FFmpeg/blob/master/Makefile

  Can you help me ?

• FFMPEG Converting a bunch of PNG images to a video

  7 février 2017, par user2419553

  I have a folder full of 600 .png’s that I’d like to convert to a video using FFMPEG. The .png filenames are as follows :

  f_001.png

  f_002.png

  f_003.png

  ...

  f_600.png

  I’ve been trying to use the following command to try to convert them :

  ffmpeg -r 10 -i root/Record/frames/f_%03d.png -vcodec libx264 -crf 0 /root/Record/"$(date +"%Y_%m_%d %I.%M %p")".mkv

  But I keep getting the error :

  Could find no file with path 'root/Record/frames/f_%03d.png' and index in the range 0-4
  
  root/Record/frames/f_%03d.png: No such file or directory