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• Ruby Video Upload - Cocaine error when trying to transcode video

  21 janvier 2015, par Scottagecheeze

  I am having a bit of trouble when it comes to transcoding a video being uploaded by Paperclip to S3. I have tried both gem 'paperclip-ffmpeg' and gem 'paperclip-av-transcoder. Both fail when I try to add a new style :

  :styles => {
  
      :medium => { :geometry => "640x480", :format => 'flv' }
  
    }, 
  
    :s3_credentials => {:bucket => ENV['S3_BUCKET_NAME'], :access_key_id => ENV['ACCESS_KEY_ID'], :secret_access_key => ENV['SECRET_ACCESS_KEY']},
  
    :processors => [:ffmpeg],
  
    :path => ":id/:style/:style_:basename.:extension"

  I am able to upload my video as is but I am not able to transcode them. Here is the error that it gives me, sorry for the link, I am not able to post images yet.

  Essentially I want to be able to upload a video in any format and transcode it into a specific format. Any help is greatly appreciated.

  Thanks

• FFmpeg video to still images and back to video lossless

  28 novembre 2012, par Rigoni

  I'm trying to extract an image from an uncompressed AVI video using FFmpeg with the command :

  ffmpeg -i sorce.avi -f image2 -pix_fmt bgr24 images/%1d.bmp

  All is okay, but now I need to convert these images back to a video file.
  I'm trying using this command :

  ffmpeg -f image2 -r 24 -i marked/%1d.bmp -y -vcodec ffv1 -pix_fmt bgr24 test.avi

  But the output video is compressed and poor quality.

  Is there any way to extract the images in RGB format and than back to a lossless video ?

  I also tryed to use -vcodec rawvideo, but the quality still bad.

• How to convert video from mov to mp4 video format through FFMPEG integration in android [closed]

  28 septembre 2012, par Sanat Pandey

  I have a problem that I received a video file from the server which can not be played throgh video view from the app I am making. I don't know what the actaul problem is because all videos are played through same video view but the video received from the server side is not played. So, I think that I have to integrate FFMPEG in our android app, so I can play every video at a runtime conversion. For this I have read much more about FFMPEG Library integration with android through many sites as :

  http://www.roman10.net/how-to-build-android-applications-based-on-ffmpeg-by-an-example/
  Downloaded some projects from GitHUb (https://github.com/appunite/AndroidFFmpeg) but unable to succeed for building the Library through NDK. Some thing I missed and I am working on Windows machine, probably this might be a problem. I want the exact solution regarding this, means step by step solution for building the android project with FFMPEG Library. If you have some useful suggestion then please share with me.

  Thanks in advance.