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• how to name the output file same as input file but different extension after video conversion ? [duplicate]

  4 mars 2018, par kofhearts

  This question already has an answer here :

  • How do you convert an entire directory with ffmpeg ?
    
    10 answers
    

  I am using this line to batch convert mp4 files to webm files. For all mp4 files i need the output files to be of same name but .webm extension. For example if i have video1.mp4 and video2.mp4 then after conversion i need two files i.e video1.webm and video2.webm. How can i achieve this using bash script ?

  for f in *.mp4; do ffmpeg -i "$f" -c:v libvpx -crf 10 -b:v 1M -c:a libvorbis "$f".webm;  done

  The above code will change the output file to video1.mp4.webm. Thanks !

• Music Video Idiosyncrasies

  18 juin 2011, par Multimedia Mike — General

  So I’m watching a fairly recent music video for a song named "XXXO" from an artist named M.I.A. when I’m suddenly assaulted by this imagery :

  
  
  

  ... and I enter nervous convulsions. You see, while this might seem to be an odd video effect to the casual viewer, to a multimedia hacker, it appears to be deliberately antagonistic. To anyone who has written a video codec, this scene looks like an entire casserole of video bugs, combining creeping plane offsets errors, chroma problems, and interlacing havoc. The craziest part is to realize that this is probably some kind of standard video effect / filter type. Upon a repeat viewing, I realized that the entire video sort of looks like an amateur video editor’s first week using video software.

  Elsewhere in the video, a YouTube-style video frame vortex highlights the proceedings. I guess I need to come to terms with the fact that the ubiquitous player frame is just part of the digital Zeitgeist now :

  
  
  

  Vintage Video Strangeness
  I’m a long-time music video junkie but I have a tendency of examining them entirely too closely. I first saw Paula Abdul’s video for "Cold-Hearted" when I was just starting to understand multimedia technology and how it interacted with emerging home computers. Imagine how confused I was when I tried to make sense of the actions performed by our eMaestro "Chuck" whom Paula has instructed to "hit it". First, he hits a key followed by 3 quick strikes on a second key :

  
  
  

  Then, the "start music" action is apparently bound to a particular key on the electronic keyboard :
  
  

  
  
  

  Which kicks off the electronic metronome on the computer. Each identical-sounding beat quizzically maps to a different frequency transform :

  
  
  a one...
  
  and a two...
  
  and a three...
  

  I had no trouble believing things up to this point. But even though I didn’t understand what was going on with that frequency transform, I knew that it must have had something to do with the audio. And if the audio was the same, the visualization ought to be the same. Though, to be fair, I will concede that the first and third ticks pictured bear some mutual resemblance.

  Anyway, the software is probably real even if the keyboard interaction was stylized. Can anyone identify the software ? What about the computer ? This is perhaps the best view the video gives us :

  
  
  

  So, remember, don’t base your understanding of technology — or anything, really — on stylized media representations. Don’t even get me started on the movie "Sneakers." That had me confused about cryptography and computer security for many years.

• Unable to load FFProbe - Ubuntu - Laravel 5.5

  6 décembre 2018, par Shreeraj

  I know there are already many questions asked over this issue. Been searching for the solution since last 2 days. I have found several forums :

  Ubuntu - Laravel 5.6 - Unable to load ffprobe (using php-ffmpeg)

  Unable to load FFProbe in laravel app

  getting error Unable to load FFprobe

  Laravel unable to load FFProbe ?

  Unable to load FFProbe driver for FFmpeg

  I have already tried all of the above suitable solutions but none worked.
  Also tried installing the below given packages.

  composer require sormagec/laravel-ffmpeg

  composer require pbmedia/laravel-ffmpeg (Didn’t work because of laravel version, I guess)

  I have set the binary paths correctly :

  return [
  
  'default_disk' => 'local',
  
  
  
  'ffmpeg.binaries' => '/usr/bin/ffmpeg',
  
  'ffmpeg.threads'  => 12,
  
  
  
  'ffprobe.binaries' => '/usr/bin/ffprobe',
  
  
  
  'timeout' => 3600,
  
  ];

  I am using Laravel 5.5 version

  I am not sure what else is missing or where am I lacking. I have installed ffmpeg in my ubuntu. And other required packages in my Laravel application. Please help me out if anything else is missing.