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• ffmpeg Problem with converting. ffmpeg converts image attachments to stream ? [closed]

  5 mars 2021, par For Fun

  I have a mp4 file with cover.jpg as attachments but when I use -c copy to convert to mkv the image won't stay as attachments ffmpeg changes it to stream 0:2 ?

  


  ffmpeg -i 'file.mp4' -c copy -map 0 'output.mkv' 


  


  Full Log : https://pastebin.com/raw/L9Ss3qbx

  


• Run PHP exec() asynchronously, but check for completion ?

  1er septembre 2015, par PeregrineStudios

  I’m coding up a website back-end that will include user-uploaded video. In order to ensure maximum accessibility, I’m compressing the uploaded videos and re-saving them as .mp4 and .webm format to cover all browsers (or as many as possible anyway). To do this, I’m running an avconv command in the PHP exec() function.

  I don’t want to make the user wait for the script to finish before the page loads, so I’m running the code asynchronously. My code so far is below.

  exec('bash -c "exec nohup setsid avconv -i ' . $tempPath . ' -c:v libx264 ' . $transpose . ' ' . $newPath . 'mp4 > /dev/null 2>/dev/null &"');
  
  exec('bash -c "exec nohup setsid avconv -i ' . $tempPath . ' -c:v libvpx ' . $transpose . ' ' . $newPath . 'webm > /dev/null 2>/dev/null &"');

  In addition to running the exec functions, I also save the video to a database and send the user an email thanking them for uploading their video.

  Here’s the rub : I want the server to WAIT until the video conversion is finished, and THEN add it to the database and send the user an email. Basically, the program flow would be :

  User uploads video.
  Video is placed in a temp folder.
  User is taken to a thank you page indicating their video will be up shortly.
  The server executes two avconv commands to convert and compress the video for web use.
  Once BOTH conversions are finished, the video info is added to a MySQL database, an email is sent to the user, and the original uploaded video is deleted.

  It may just be my ignorance of the command line (in fact it almost definitely is), but how could I ’queue up’ these commands ? First do both conversions, then call a PHP script to add to the database, then delete the original video, all while being asynchronous with the original PHP script ?

  EDIT : I’ve tried queuing them up with an ’&&’ operator, like below :

  exec('bash -c "exec nohup setsid avconv -i ' . $tempPath . ' -c:v libx264 ' . $transpose . ' ' . $newPath . 'mp4 && avconv -i ' . $tempPath . ' -c:v libvpx ' . $transpose . ' ' . $newPath . 'webm > /dev/null 2>/dev/null &"');

  However, that seems to cancel out the fact that I’m running it asynchronously, since the page now seems to wait for the command to finish.

• Join us for the Piwik Community Meetup 2015 !

  25 juin 2015, par Piwik Core Team — Community, Meta

  

  We’re excited to announce that our third Piwik Community Meetup will be held in Berlin on Tuesday, the 4th of August, 2015. Don’t miss this great opportunity to connect with other users and meet the core team behind Piwik. It’s free, so REGISTER TODAY ! And maybe you would like to share your Piwik use case ? We’re also waiting for your presentation ideas.

  We will cover some of the upcoming features, discuss the future of Piwik, share tricks and hacks to help you get the most out of your Piwik platform, and socialise. If you use Piwik to improve your websites and apps, or are just generally curious about digital analytics and marketing – this event is not to be missed. As our core team is scattered all over the world, this will be a rare opportunity for you to meet and talk to us all at once – especially for those of you interested in the platform, integrating your app with Piwik, and building plugins.

  After the official part, we would like to enjoy drinks with all the participants in the nearby bars. We hope you will be able to join us !

  All Piwik community members are warmly invited to take part in the meetup !

  Piwik Community Meetup 2015

  When ?

  Tuesday, the 4th of August, from 5-9pm

  Where ?

  Kulturbrauerei
  Schönhauser Allee
  Prenzlauer Berg area
  Berlin, Germany
  exact directions tbc.

  Languages :

  English and German

  Book tickets :

  BOOK YOUR FREE INVITATION HERE

  Open call for YOUR presentation ideas

  We would also like to hear how you use Piwik – we’ll be delighted if you’d share your interesting use case during the Meetup. Please send your presentation ideas (speaking time : 5 to 7 minutes) to : meetup@piwik.pro ! Deadline : 20th of July 2015.

  Contact the organisers :

  meetup@piwik.pro