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• Cannot include FFmpegMediaPlayer lib in my android project

  20 août 2015, par Lucabro

  I’ve to include in my Android studio project a lib for managing audio streams from urls. I’m tying to use this, but when I try to run the app and it reach the point where have to instantiate a FFmpegMediaPlayer object, it crush with the error

  31444-31444/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
  
      java.lang.ExceptionInInitializerError

  These the steps I’ve done to integrate the lib in my project :

  • I’ve copied all .so, gdb.setup and gdbserver files from demo project and put them into my jniLibs replicating the exact folder structure
  • I’ve copied fmp.jar from demo my libs forlder
  • I’ve changed all paths in gdb.setup files accordingly with my project folder structure
  • synch with gradle

  I’m not an expert of Android specially for tasks like this, am I missing something important ? If you need it I can give a test app

  Thankyou

  Edit 1

  This is the complete error

  08-19 10:20:42.066  31444-31444/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
  
      java.lang.ExceptionInInitializerError
  
              at com.example.lucabrognara.radiostreamprova.RadioActivity.onCreate(RadioActivity.java:126)
  
              at android.app.Activity.performCreate(Activity.java:5206)
  
              at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
  
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
  
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
  
              at android.app.ActivityThread.access$700(ActivityThread.java:140)
  
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
  
              at android.os.Handler.dispatchMessage(Handler.java:99)
  
              at android.os.Looper.loop(Looper.java:137)
  
              at android.app.ActivityThread.main(ActivityThread.java:4921)
  
              at java.lang.reflect.Method.invokeNative(Native Method)
  
              at java.lang.reflect.Method.invoke(Method.java:511)
  
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
  
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
  
              at dalvik.system.NativeStart.main(Native Method)
  
       Caused by: java.lang.UnsatisfiedLinkError: Cannot load library: link_image[1892]:  1836 could not load needed library 'libswresample.so' for 'libavcodec.so' (load_library[1094]: Library 'libswresample.so' not found)
  
              at java.lang.Runtime.load(Runtime.java:340)
  
              at java.lang.System.load(System.java:521)
  
              at wseemann.media.FFmpegMediaPlayer.<clinit>(FFmpegMediaPlayer.java:604)
  
              at com.example.lucabrognara.radiostreamprova.RadioActivity.onCreate(RadioActivity.java:126)
  
              at android.app.Activity.performCreate(Activity.java:5206)
  
              at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
  
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
  
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
  
              at android.app.ActivityThread.access$700(ActivityThread.java:140)
  
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
  
              at android.os.Handler.dispatchMessage(Handler.java:99)
  
              at android.os.Looper.loop(Looper.java:137)
  
              at android.app.ActivityThread.main(ActivityThread.java:4921)
  
              at java.lang.reflect.Method.invokeNative(Native Method)
  
              at java.lang.reflect.Method.invoke(Method.java:511)
  
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
  
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
  
              at dalvik.system.NativeStart.main(Native Method)
  
  </clinit>

• Extracting image frames from mjpeg given 'frame byte offset' and 'frame size' [on hold]

  2 septembre 2015, par Sonia

  I’m looking for code or pointers to funtions or library that I can use to extract image frames from motion jpeg file. In my case, for each image frame, I know the starting byte offset and the size of the frame (size is not always equal for each frame). Given these data, how can I extract each image frames from mjpeg file.

  I have checked the OpenCV library, I can’t find the detail about giving these two inputs to extract frames. Also, I can’t find it in FFmpeg as well. But, I’m not an expert in these two. I hope anyone could give me pointers to this. It can be just a tool or sourcecode (I use C/C++ and MATLAB but I’m open to other language - just to learn how to do it)

  Thank you very much.

• ruby on rails carrierwave-video ffmpeg AWS

  11 mars 2015, par Joseph Han Nim Jang

  I am trying to create an academic site where users can upload lecture videos and other users can view them - similar to a site like Udemy.

  I am using Carrierwave, Carrierwave-video (for encoding videos), AWS to make this happen. AWS configuration has been done, and it’s working.

  However, I am getting this error. (By the way, I am testing this video feature in a Yelpdemo site, so I am trying to have users upload videos to restaurants for now.)

  rails points the error to @restaurant = Restaurant.new(restaurant_params)

  Errno::ENOENT in RestaurantsController#create

  No such file or directory - ffmpeg

  # POST /restaurants.json
  def create
  @restaurant = Restaurant.new(restaurant_params)

  respond_to do |format|
  
    if @restaurant.save

  This is my video_uploader.rb

  # encoding: utf-8
  
  
  
  class VideoUploader < CarrierWave::Uploader::Base
  
  
  
    include CarrierWave::Video
  
    include CarrierWave::Video::Thumbnailer
  
  
  
    process encode_video: [:mp4]
  
  
  
    include CarrierWave::MiniMagick
  
  
  
    storage :fog
  
  
  
    def store_dir
  
      "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  
    end
  
  
  
     version :thumb do
  
        process thumbnail: [{format: 'png', quality: 10, size: 192, strip: true, logger: Rails.logger}]
  
        def full_filename for_file
  
          png_name for_file, version_name
  
        end
  
    end
  
  
  
      def png_name for_file, version_name
  
        %Q{#{version_name}_#{for_file.chomp(File.extname(for_file))}.png}
  
      end
  
  end

  I have manually (added a file to the model) created video.rb in the model - not sure if this is the right way to do it..

  class Video < ActiveRecord::Base
  
  
  
    attr_accessor :user_id, :video,, :type, :filename, :path, :filesize, :width, :height, :duration, :bit_rate
  
  
  
    belongs_to :restaurant
  
    belongs_to :user
  
  
  
    mount_uploader :video, VideoUploader
  
  end

  in app/views/restaurants/show.html.erb for showing the video. Right now, without the encoding done, I can see like an image of the video. When I right lick and copy the code - it gives me the AWS URL which means AWS configuration is in place

          <p>
  
              <strong>Video:</strong>
  
              &lt;%= video_tag @restaurant.video_url %>
  
          </p>

  I am trying to show videos like this.

  I have downloaded FFMPEG (both ffmpeg-2.6 and SnowLeopard_Lion_Mountain_Yosemite_17) - not sure which one’s the right one.. And I have read somewhere that you need to place FFMPEG in your usr/local/bin -> So do you have to physically place ffmpeg exec file in your respective folder ?

  Need your expert help please.

  Thank you in advance !