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• Get 'location' of video using ffmpeg and regex

  6 février 2014, par Foysal

  I have a metadata text of a video file which is produced by ffmpeg.

  Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2011-09-10 21:44:22
  
      model           : iPhone 4
  
      model-deu       : iPhone 4
  
      encoder         : 4.3.5
  
      encoder-deu     : 4.3.5
  
      date            : 2011-09-10T17:44:22-0400
  
      date-deu        : 2011-09-10T17:44:22-0400
  
      location        : +40.7329-073.9864/
  
      location-deu    : +40.7329-073.9864/
  
      make            : Apple
  
      make-deu        : Apple

  What regex i need to write if I want to get the 'location' value from above text. I am using C#.

• How to make video (of any format) compatible to play in android's default player ?

  24 janvier 2014, par Aarti

  I want to play video urls from server in device's video player,but unable to play all videos
  Testing on HTC Desire (4.1.1), Panasonic (4.1.3), Samsung G S2(2.3.6).

  I've already gone through following links

  Sorry, this video cannot be played - streaming mp4 to android and
  How to Play Streaming Audio/Video from a url ?
  but did not found working solution.

  I understand few imp things from above,

  1. Video must be baseline H264 encoded for playing successfully on all devices
  2. For encoding any kind of video to H264, we need to integret ffmpeg

  My questions are,

  1. How exactly I can convert any format of video to H264 baseline support ? Examples are appreciated.
  2. Is there any alternate way for FFMPEG ?
  3. How can I check if video is baseline H.264 ?

  I have tried playing videos with both Intent ACTION_VIEW & MediaController, result was same for both.

  Its very urgent. Any kind of help or hint appreciated. Thank You.

• Raising and Rescuing Custom Exception

  24 décembre 2013, par cmw

  I'm using Rails 3 with Carrierwave and FFMPEG to handle video uploads and encoding.

  In my uploader, I'm using FFMPEG to grab the duration of the video from cache before storing it.

  I'd like to raise a custom exception if the video's duration exceeds a specific length and then route the user accordingly. I've spent quite a bit of time trying to figure out how to create, raise and rescue my own custom exceptions in Rails – but, I've had no luck.

  Some posts I've used to try to piece this together include this stack overflow post and this article on customized exception handling in Rails 3. I've had no luck yet.

  I'm hoping someone can offer guidance on the proper approach to this. My mind is blown.

  Below is what my uploader looks like :

  class VideoUploader < CarrierWave::Uploader::Base
  
  
  
    before :store, :ffmpeg
  
  
  
    # Set storage type
  
    storage :fog
  
  
  
    # Override the directory where uploaded files will be stored.
  
    def store_dir
  
      "#{model.class.to_s.underscore}/videos/#{model.id}"
  
    end
  
  
  
    # Add a white list of extensions which are allowed to be uploaded.
  
    def extension_white_list
  
      %w(mov avi mp4 mkv wmv mpg)
  
    end
  
  
  
    def full_cache_path
  
      "#{::Rails.root}/public/#{cache_dir}/#{cache_name}"
  
    end
  
  
  
    private 
  
  
  
    def ffmpeg(*args)
  
      @model.video.cache_stored_file!
  
      movie = FFMPEG::Movie.new("#{model.video.full_cache_path}")
  
      if movie.duration > 600
  
        raise "my custom exception will go here one day"
  
      end
  
    end
  
  
  
  end