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• How to fix "FFmpeg command cannot exec when multiple mp3 file to process into one" on server side

  7 février 2019, par Harshil Dholakiya

  I am using FFmpeg in my php yii2 project. FFmpeg working fine in my project but one major problem is execute FFmpeg command with multiple input file. When i try to use single file to process in ffmpeg command then it works. so, how can i fix this problem ? I am using hostGator shared plan for my project. Please, help if is there any process limit or file open limit on server that i don’t know.

  I have tried using this command in php exec() :

  ffmpeg -y -i /uploads/ac/10122018-09351115-a94rlvlawvikskb4vdrca.mp3 -i /uploads/ac/09012019-035928988-assknyrk8oujccwevir7.mp3 -f lavfi -i anullsrc -filter_complex "[2]atrim=duration=3[g0];[2]atrim=duration=1[g1];[2]atrim=duration=5[g2];[g0][0][g1][1][g2]concat=n=5:v=0:a=1" /uploads/jm/concat.mp3 2>&1

  Above command works local side but not working on server side.

  output on server side with error code 1:
  
  Press [q] to stop, [?] for help
  
  pthread_create failed: Resource temporarily unavailable. Try to increase `ulimit -v` or decrease `ulimit -s`.
  
  Conversion failed!

• How to add cover art to MP4 ?

  27 décembre 2018, par Ceetch

  I’m trying to find an effective way to update the metadata for my MP4 files that I plan to put on a DLNA server. First thing, I want to have the video files have a cover art.

  I’m specifically using 640x360 JPG files to be the cover art.
  I might also want to add some other tags, like media type or update the Title. Please let me know what can be done.

  If code suggestions are available, please know I have the file name details in a variable %file% to handle things. The JPG has the same name as the source MP4 file, so it’s easy enough to get the file type and remove the extension, which is what I’ve done so far.

  My goal is to be able to simply drop the MP4 file on the following batch file and know its filename and full path, the JPG file, and attach it to the orgininal MP4 file. Apparently ffmpeg.exe won’t write to the file it pulled from, so I have it go to a temp file and then use MOVE to replace the old file with the fixed file.

  @ECHO OFF
  
  set arg=%1
  
  set file=%arg:~1,-5%
  
  ffmpeg -i "%file%.mp4" -i "%file%.jpg" -acodec copy -vcodec copy -map 0 -map 1:0 "%file%WIP.mp4"
  
  move /Y "%file%WIP.mp4" "%file".mp4"

  This code did not seem to work. It doesn’t show up in Windows as the cover art, so I’d say it failed.

• website performance issues when using ffmpeg on separate server

  10 décembre 2018, par Rich

  I am currently working on a site that uses wordpress and ffmpeg. I have it setup so that I have 3 servers - main, database, ffmpeg. So far I have it all working, however I am still running into issues when I am trying to encode a video.

  Whenever I start encoding a video, if I try opening any other links in a new tab, it gets stuck on loading until ffmpeg is done. I dont understand why, since im using multiple servers.

  My specs for my servers —

  Main (web server) - 4 vCPUs / 8GB RAM / 160GB Disk

  Database server - 2 vCPUs / 4GB RAM / 80GB Disk

  Ffmpeg server - 8 vCPUs / 32GB / 640GB Disk

  They are all in the same region as well, and I have private IPs as public for them. Public IPs uses IPv4.

  On my template page I have a form that the users fills out and uploads images, then using ajax it sends the info to my ffmpeg functions in my functions.php file.

  Images are uploaded to the main server and then on that server in my functions.php file I use ssh2 to login to the ffmpeg server and run different commands, for example —

  $server   = "FFMPEG SERVER IP"; // server IP/hostname of the SSH server
  
  $username = "user"; // username for the user you are connecting as on the SSH server
  
  $password = "pass"; // password for the user you are connecting as on the SSH server
  
  // Establish a connection to the SSH Server. Port is the second param.
  
  $connection = ssh2_connect($server, 22);
  
  // Authenticate with the SSH server
  
  ssh2_auth_password($connection, $username, $password);
  
  $sftp = ssh2_sftp($connection);
  
  ssh2_sftp_mkdir($sftp, $thepathw);
  
  
  
  $command = '/usr/local/bin/ffmpeg -threads 1 -i '.$thepath .'/audio.mp3 -safe 0 -f concat -i '.$thepath.'/paths.txt -vf "scale=1280:720,setsar=1" -pix_fmt yuv420p -c:a aac -af "volume=-5dB" -c:v libx264 -movflags +faststart '.$fixedtime.' -y '.$output.' 2>&1';
  
  
  
  // Execute a command on the connected server and capture the response
  
  $stream = ssh2_exec($connection, $command);
  
  // Sets blocking mode on the stream
  
  stream_set_blocking($stream, true);
  
  // Get the response of the executed command in a human readable form
  
  $output1 = stream_get_contents($stream);
  
  // echo output
  
  echo $output1;

  The video file that is created is then saved to the ffmpeg server.

  This all works as should and Im able to create videos, but the rest of the site doesnt seem to respond/load until ffmpeg is done. This is a big problem since I plan on having multiple users at once on the site.

  So how can I improve this setup so that the ffmpeg server doesnt slow down the main server, and multiple users can safely use the site ?

  Im also open to the idea of getting another server to upload my images to, instead of on the main. Im not sure if that would help though cause it seems like a lot of pulling/sending data between multiple sources/IPs may slow down the response time.

  Any suggestions is appreciated, thanks.