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• Rails 5 with Carrierwave and S3 - creating multiple video formats for DASH streaming works but mpd file breaks

  22 novembre 2019, par Milind

  what I am doing -
  i have a Rails 5 app for video streaming(DASH MPEG) that uses FFMPEG to get encoded stream videos by converting any single video into multiple videos of multiple bit rates/size and primarily also MPD FILE that can be played easily on html video player, which i have already tested by manually running the ffmpeg scripts on the console that generates all the files.However, I want to automate this process and hence carrierwave comes into the pictures.
  Here, i use carrierwave to generate different versions(size/bitrate) of videos(mp4/webm) to upload to s3 but during running the version, where all the versions are successfully created in tmp folder, only the last version(mpd) that needs to create .mpd file, carrierwave creates a mp4 video file and just replaces the extension instead of actually creating the mpd file.

  So in the aws s3(screenshot added below), i can see my all versions and mpd file , but that mpd file which must be xml file is actually a mp4 video file or uploaded version file itself.
  I have also tried to create new file during the process, but it never works.
  Has some one encountered this problem ?

  any help will be greatly appreciated ?

  Ny code snippets below - model,uploader,output of script on the console during upload, s3 screenshot

     ##### models/video.rb ##########
  
  
  
      mount_uploader :video, VideoUploader  
  
  
  
     ####### uploaders/video_uploader.rb #########
  
  
  
      class VideoUploader < CarrierWave::Uploader::Base
  
  
  
  
  
      include CarrierWave::MiniMagick
  
      include CarrierWave::Video
  
      include CarrierWave::Video::Thumbnailer
  
      include ::CarrierWave::Backgrounder::Delay
  
  
  
      ####### for streaming ..first get the audio and then convert the input video into multiple bitrates/scale #######
  
  
  
      ###first get audio and then get all different versions of same video
  
      version :video_audio do
  
        process :get_audio
  
  
  
        def get_audio
  
          `ffmpeg -y -i "#{file.path}" -c:a aac -ac 2 -ab 128k -vn video_audio.mp4`
  
        end
  
  
  
          def full_filename(for_file)
  
            "video_audio.mp4"
  
          end
  
  
  
          def filename
  
            "video_audio.mp4"
  
          end        
  
      end 
  
  
  
      ####### similar to the above i have various version like ...#########
  
  
  
      version :video_1080 do...end
  
      version :video_720 do... end
  
      version :video_480 do ...end
  
      ...and so on..and all these versions are successfully created and uploaded to s3, however..in next version ...show it also creates a video file whereas i need a simple mpd file ONLY.
  
  
  
           ###this is where even after everything works, in S3, i can see a video file of version mpd and not actual mpd file
  
           version :mpd  do
  
             process :get_manifest
  
                ###here in the command below, the video.mpd file is successfully obtained but its uploaded as video.mpd file of added/uploaded video file and not a new mpd file
  
                ###tried with ffmpeg -f webm_dash_manifest -i too, but s3 still shows a mp4 file
  
                `MP4Box -dash 1000 -rap -frag-rap -profile onDemand -out video.mpd video_1080.mp4 video_720.mp4 video_480.mp4 video_360.mp4 video_240.mp4 video_audio.mp4 `
  
  
  
             end
  
            end
  
  
  
           ######### sidekiq console output - successful mpd is generated ################
  
                DASH-ing files - single segment
  
                Subsegment duration 1.000 - Fragment duration: 1.000 secs
  
                Splitting segments and fragments at GOP boundaries
  
                DASHing file video_1080.mp4
  
                DASHing file video_720.mp4                                  
  
                DASHing file video_480.mp4                                  
  
                DASHing file video_360.mp4                                  
  
                DASHing file video_240.mp4                                  
  
                DASHing file video_audio.mp4                                
  
               \[DASH\] Generating MPD at time 2019-11-22T00:01:59.872Z      
  
                mpd_1mb.mp4
  
                mpd_video.mpd

  this is what the uploaded files looks on s3, notice the video.mpd, its a mp4 video file just like others which should have been a simple mpd file of not more than 2kb.

  Is there something that I am missing ?
  Can Carrierwave do this or is it not made for this ?
  Do I have to write a callback and then programmatically upload files to s3, if carrierwave is not helping in this regard ?

  Kindly provide any suggestion or useful advice so that I can move ahead.

  

• Open letter to the European Parliament’s LIBE committee

  28 novembre 2019, par Joselyn Khor — Uncategorized

  An open letter to the European Parliament’s LIBE committee

  

  In an effort to stem the tide of external control over user privacy, Matomo has rallied with other like-minded companies like Protonmail, NextCloud, Tutanota and Mailfence, to advocate for pro-privacy changes to the European Commission’s “e-evidence” proposal.

  Excerpt from the letter : 

  “The Commission’s e-evidence proposal threatens the competitive advantage European tech businesses have over their American counterparts by undermining the protections we can provide to our customers. It breaks with the long-standing rule that only trusted national judicial authorities can order companies to hand over customer data for criminal investigations. Instead, the Commission’s e-evidence proposal would allow any foreign law enforcement agency from across the EU to force us to hand out customer data without our own authorities doublechecking the foreign order.

  “Different from American Big Tech firms, European privacy tech companies lack the resources to verify the legality of each foreign order. Because of the way the e-evidence proposal is phrased, we would not even be able to properly authenticate foreign authorities to ensure that we are not replying to a malicious actor – let alone object to an order if we found it to be unwarranted.”

  Matomo Founder, Matthieu Aubry emphasises, “It is time that privacy-minded tech companies work together to defend their users, their businesses, and the values they are founded on. This is why we are supporting Privacy Tech Europe.”

  Read our open letter to members of the LIBE Committee in full.

• Heroku : FFMpeg installed but php worker can't find it

  4 décembre 2019, par Greco Jonathan

  Context

  I’ve a RabbitMQ’s queue that contains AMQPMessage, those messages are referencing a video that needs to be treated (cut essentially and encoded in x264 also)

  Here’s the code that cause the issue (pretty straightforward)

          $ffprobe = FFProbe::create([
  
              'ffmpeg.binaries'  => '/usr/bin/ffmpeg',
  
              'ffprobe.binaries' => '/usr/bin/ffprobe',
  
          ]);

  Error Message

  TL ;DR :
  Error: "Unable to load FFProbe"

  [2019-12-03 14:55:07] messenger.ERROR : Error thrown while handling message App\Api\Message\AMQPvideoFFMPEG. Sending for retry #1 using 1000 ms delay. Error : "Unable to load FFProbe" "message" :"[object] (App\Api\Message\AMQPvideoFFMPEG : {})","class" :"App\Api\Message\AMQPvideoFFMPEG","retryCount":1,"delay":1000,"error" :"Unable to load FFProbe","exception" :"[object] (Symfony\Component\Messenger\Exception\HandlerFailedException(code : 0) : Unable to load FFProbe at /app/vendor/symfony/messenger/Middleware/HandleMessageMiddleware.php:80, FFMpeg\Exception\ExecutableNotFoundException(code : 0) : Unable to load FFProbe at /app/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/Driver/FFProbeDriver.php:50, Alchemy\BinaryDriver\Exception\ExecutableNotFoundException(code : 0) : Executable not found, proposed : /usr/bin/ffprobe at /app/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/AbstractBinary.php:160)" []

  Configuration & tests

  On Heroku I’ve 2 dynos :

  - web $(composer config bin-dir)/heroku-php-nginx -C config/packages/dev/heroku_nginx.conf public/
  
  - worker php bin/console messenger:consume ffmpeg 

  On this platform, I’ve also 3 buildpacks, look below, with this specific buildpack :

  

  To make sure that all is available here’s the results of my checks :

   heroku run "ffmpeg -version" -a project-dev 
  
  Running ffmpeg -version on ⬢ project-dev... up, run.6134 (Hobby)
  
  ffmpeg version N-67574-g9d6ad68 Copyright (c) 2000-2014 the FFmpeg developers
  
  built on Nov 12 2014 11:35:09 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
  
  configuration: --enable-static --disable-shared --disable-asm --extra-libs=-L/app/vendor/libs/lib --extra-cflags=-I/app/vendor/libs/include --prefix=/app/vendor/ffmpeg --enable-libfdk-aac --enable-nonfree --enable-libx264 --enable-gpl
  
  libavutil      54. 11.100 / 54. 11.100
  
  libavcodec     56. 12.100 / 56. 12.100
  
  libavformat    56. 12.103 / 56. 12.103
  
  libavdevice    56.  2.100 / 56.  2.100
  
  libavfilter     5.  2.103 /  5.  2.103
  
  libswscale      3.  1.101 /  3.  1.101
  
  libswresample   1.  1.100 /  1.  1.100
  
  libpostproc    53.  3.100 / 53.  3.100

   heroku run "ffprobe -version" -a projet-dev
  
  Running ffprobe -version on ⬢ projet-dev... up, run.2357 (Hobby)
  
  ffprobe version N-67574-g9d6ad68 Copyright (c) 2007-2014 the FFmpeg developers
  
  built on Nov 12 2014 11:35:09 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
  
  configuration: --enable-static --disable-shared --disable-asm --extra-libs=-L/app/vendor/libs/lib --extra-cflags=-I/app/vendor/libs/include --prefix=/app/vendor/ffmpeg --enable-libfdk-aac --enable-nonfree --enable-libx264 --enable-gpl
  
  libavutil      54. 11.100 / 54. 11.100
  
  libavcodec     56. 12.100 / 56. 12.100
  
  libavformat    56. 12.103 / 56. 12.103
  
  libavdevice    56.  2.100 / 56.  2.100
  
  libavfilter     5.  2.103 /  5.  2.103
  
  libswscale      3.  1.101 /  3.  1.101
  
  libswresample   1.  1.100 /  1.  1.100
  
  libpostproc    53.  3.100 / 53.  3.100

  All good !

  Disclaimer

  This code is working well on another platform (handled by kubernetes), so it may need some adjustments with heroku. But can’t find it.

  Why this error since my configuration is not showing any missconfigurations ? What am I missing here ?