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• src/flac/utils.c : Make sure get_console_width() returns value > 0.

  8 juillet 2014, par Erik de Castro Lopo

  src/flac/utils.c : Make sure get_console_width() returns value > 0.
  Previous version of get_console_width() may return 0 which will result in
  
  a division by 0 in stats_print_name() :
  	console_width = get_console_width() ;
  
  	len = strlen_console(name)+2 ;
  
  	console_chars_left = console_width  - (len % console_width) ;
  Bug-report : https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=739613
  
  Patch-from : lvqcl <lvqcl.mail@gmail.com>
  

  • [DH] src/flac/utils.c

• PHP ffmpeg exec returns null

  19 mars 2012, par benedict_w

  I'm trying to run ffmpeg through a PHP exec call, I've been debugging for a while and looked at lot of responses on here, but still not found any answers...

  My simplified call is :

  $cmd = 'ffmpeg 2>&1';
  
  
  
  exec(escapeshellcmd($cmd), $stdout, $stderr);
  
  
  
  var_dump($stderr);
  
  var_dump($stdout);
  
  var_dump($cmd);
  
  exit;

  My output is $stderr = int(1) and $stdout = array(0)

  Also I tried shell_exec($cmd) which returns NULL.

  cmd.exe has permissions set for the IUSR account - e.g. I can run $cmd = 'dir' and see a directory listing output.

  PHP is not running in safe mode.

  The ffmpeg.exe is in the same directory as my php file, but I have the same response giving an absolute path to the ffmpeg.exe file in $cmd.

  ffmpeg is executing fine from the command line.

  I'm running Windows XP, IIS and PHP 5.3.

  EDIT :

  If I run 'ffmpeg -h' I get the help commands, which must indicated that ffmpeg is recognised

  I've increased the PHP memory limit to 1024 - no luck.

• Error launching ffmpeg in Windows service for screen recording using GDI capture and issue when screen is locked

  21 mai 2023, par Артем Артемыч

  I have a Go application that works as Windows service. It launches ffmpeg to record the screen using the Win32 GDI-based screen capture device. However, when the service runs under the SYSTEM account, ffmpeg fails to start, and I receive the following error :

  


  [gdigrab @ 000001ff2a1ea200] Capturing whole desktop as 1024x768x32 at (0,0)
[gdigrab @ 000001ff2a1ea200] Failed to capture image (error 5)
[gdigrab @ 000001ff2a1ea200] Could not find codec parameters for stream 0 (Video: bmp, none, 125831 kb/s): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, gdigrab, from 'desktop':
  Duration: N/A, bitrate: 125831 kb/s
  Stream #0:0: Video: bmp, none, 125831 kb/s, 5 fps, 1000k tbr, 1000k tbn
Output #0, mpegts, to 'pipe:1':
Output file #0 does not contain any stream



  


  However, if I run ffmpeg using the token of the current user, like this :

  


  token, _ := wintoken.GetInteractiveToken(wintoken.TokenLinked) // using the "github.com/fourcorelabs/wintoken" library
a.cmd = exec.Command("ffmpeg", params...)
a.cmd.SysProcAttr = &syscall.SysProcAttr{
    Token:         syscall.Token(token.Token()),
    CreationFlags: 0x08000000,
    HideWindow:    true,
}


  


  the screen recording works. But as soon as the UAC prompt appears or the screen is locked (win+L), the recording stops with the following error :

  


  [gdigrab @ 00000258d9efa540] Failed to capture image (error 5)
Error demuxing input file 0: I/O error
desktop: I/O error


  


  I have tried running ffmpeg with psexec :

  


  timeout 10 /NOBREAK && psexec -i -h -d -s ffmpeg -f gdigrab -framerate 5 -i desktop -c:v libx264 -preset veryfast -bf 2 -g 150 out.mp4



  


  If recording starts while the screen is locked, everything works fine, i.e. ffmpeg records the locked screen. However, I haven't been able to reproduce this behavior when launching from Go. Is it possible to achieve continuous screen recording without stopped when the UAC prompt appears or the screen is locked ?
Or maybe there are other approaches in which I can solve my problem