Recherche avancée

Sur d’autres sites (11863)

• How to set the rotation angle of jpeg with ffmpeg

  20 avril 2022, par Feng Nier

  I have figured out how to get the rotation of the jpeg,

  


  auto m = av_dict_get(frame->metadata, "orientation", nullptr, AV_DICT_IGNORE_SUFFIX); 


  


  but I am not able to set it by ffmpeg.

  


• ERROR : "Cannot Find FFMPEG" on Google Cloud Compute Engine Debian Wheezy 7.8 Managed Instance even though it's installed

  4 octobre 2015, par DynamoBooster

  I wrote a Node.JS application that uses the fluent-ffmpeg module to watermark videos uploaded on the platform. I pushed the code to a my Google Cloud Compute Engine project, and every time I get Error : Cannot Find FFMPEG. I ssh’d into the instance once it was created and ran these commands to install FFMPEG before actually testing out the code. I am not sure what is causing the error because after this I am positive that FFMPEG is installed.

  sudo apt-get update
  
  sudo apt-get install -y ffmpeg
  
  export FFMPEG_PATH="/usr/bin/ffmpeg"
  
  export FFPROBE_PATH="/usr/bin/ffprobe"

  Below is my FFMPEG code

  function generate_thumbnail(name, path){
  
    logging.info("Generating Thumbnail");
  
    ffmpeg(path)
  
     .setFfmpegPath('/usr/bin/ffmpeg') 
  
     .setFfprobePath('/usr/bin/ffprobe')
  
     .on('end', function() {
  
          upload_thumbnail(name);
  
          logging.info("Thumbnail Generated and uploaded");
  
          return;
  
      })
  
    .on('error', function(err, stdout, stderr) {
  
          logging.info('ERROR: ' + err.message);
  
          logging.info('STDERR:' + stderr);
  
    })
  
    .on('start', function(commandLine) {
  
         logging.info(commandLine);
  
    })
  
    .screenshots({
  
      count: 1,
  
      filename: name + '_thumbnail.png',
  
      folder: 'public/images/thumbnails/'
  
    });
  
  }

• Find a resolution (dimension) of a video object saved in S3 - in rails

  27 septembre 2015, par JVK

  I have video files saved in s3 and I want to find the dimension/resolution of any file (lets assume file sizes are in 500mb) per the request comes in my rails app.

  One of the options, I have in my mind is :

  Download (getObject) the file in local memory and use ffmpeg to find the required info. I currently don’t have ffmpeg, as I don’t need that for any task.

  But, I don’t like this option, reason is - I don’t want to waste bandwidth to download it first (takes time) from S3 and then run cpu and memory intensive ffmpeg on my server to merely find the dimension/resolution of the video.

  Is there any better solution ?

  S3 object HEAD call on object unfortunately doesn’t return dimension information.