Sur d’autres sites (8873)

• FFmpeg Hardware Acceleration with NVENC produces Half Green output video

  17 juin 2016, par Dan Sandland

  Using the FFmpeg build found here : https://github.com/illuspas/ffmpeg-hw-win32

  gcc 5.3.0
  
  --enable-nvenc nvidia_video_sdk_6.0.1
  
  --enable-libmfx Intel(R)_Media_SDK_2016.0.1
  
  --enable-libfdk-aac 0.1.4
  
  --enable-libspeex 1.2rc1
  
  --enable-libx264 1:148.20150725
  
  --enable-libopenh264 1.5.0
  
  --enable-libx265 1.8
  
  --enable-libopus 1.1.2
  
  --enable-libmp3lame 3.99.5
  
  --enable-libkvazaar 0.8.2

  ./configure —prefix=/home/aliang/FFmpeg/x86_64 —enable-small —disable-debug —disable-doc —arch=x86_64 —cc=’ccache x86_64-w64-mingw32-gcc’ —cross-prefix=x86_64-w64-mingw32- —enable-cross-compile —target-os=mingw32 —enable-libfdk-aac —enable-libmp3lame —enable-libopus —enable-libspeex —enable-libx264 —enable-libx265 —enable-libmfx —enable-nvenc —enable-libopenh264 —enable-libkvazaar —enable-gpl —enable-nonfree

  I’m running Windows on a MacBook Pro. I also tried with a more recent build and had the same output.

  Input video is from sample-videos.com.

  The ffmpeg command I am running is :

  ffmpeg -y -i sample.mp4 -vcodec nvenc_h264 -pixel_format yuv420p -f mp4 sample-out-nvenc.mp4

  sample-out-nvenc.mp4 looks like this via ffplay or vlc :

  

  When I grab a frame using jpeg2, the colors appear normal, but the height is squished.

  ffmpeg -y -ss 15.5 -i sample.mp4 -vframes 1 -s 480x300 -f image2 grab.jpg

  

  The ffprobe results for the output (sample-out-nvenc.mp4) :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample-out-nvenc.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.25.100
  
    Duration: 00:00:31.02, start: 0.021333, bitrate: 1994 kb/s
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv), 640x480 [SAR 1:1 DAR 4:3], 1650 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 342 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  Lastly the output from the nvenc encoding command :

  ffmpeg -y -i sample.mp4 -vcodec nvenc_h264 -pixel_format yuv420p -f mp4 sample-out-nvenc.mp4
  
  ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.3.0 (GCC)
  
    configuration: --prefix=/home/aliang/FFmpeg/x86_64 --enable-small --disable-debug --disable-doc --arch=x86_64 --cc='ccache x86_64-w64-mingw32-gcc' --cross-prefix=x86_64-w64-mingw32- --enable-cross-compile --target-os=mingw32 --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libspeex --enable-libx264 --enable-libx265 --enable-libmfx --enable-nvenc --enable-libopenh264 --enable-libkvazaar --enable-gpl --enable-nonfree
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01 00:00:00
  
      encoder         : Lavf53.24.2
  
    Duration: 00:00:31.00, start: 0.000000, bitrate: 1353 kb/s
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 966 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
  Output #0, mp4, to 'sample-out-nvenc.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.25.100
  
      Stream #0:0(und): Video: h264 (nvenc_h264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 2000 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.24.102 nvenc_h264
  
      Side data:
  
        unknown side data type 10 (24 bytes)
  
      Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, 5.1, fltp, 341 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
        encoder         : Lavc57.24.102 aac
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (nvenc_h264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  frame=  774 fps=253 q=-0.0 Lsize=    7551kB time=00:00:30.99 bitrate=1995.6kbits/s speed=10.1x
  
  video:6236kB audio:1297kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.243011%
  
  [aac @ 000001cdd9900520] Qavg: 743.457

• Rails 4.2.8 Using Paperclip With Resque

  27 mars 2017, par AntonioMarquis

  My application uploads training videos to a S3 bucket. I need the transcoding videos to be processed in the background so they don’t tie up the application. I want to use Resque on my dev machine and Heroku. But my jobs continue to fail.

  Model

  has_attached_file :video
  
  
  
  process_in_background :video 

  Gems

  gem 'aws-sdk', '< 2.0'
  
  gem 'paperclip'
  
  gem 'paperclip-av-transcoder'
  
  gem "paperclip-ffmpeg"
  
  gem "ffmpeg"
  
  gem 'daemons'
  
  gem 'delayed_paperclip'
  
  gem 'nokogiri'#, '~> 1.5.9'
  
  gem 'rmagick'
  
  gem 'resque', "~> 1.22.0"

  Output from Failed Jobs

  Class ActiveJob::QueueAdapters::ResqueAdapter::JobWrapper
  
  
  
  Arguments {"job_class"=>"DelayedPaperclip::Jobs::ActiveJob", "job_id"=>"111e4f9d-942d-4613-b3cb-0e884581249f", "queue_name"=>"paperclip", "arguments"=>["Video", 30, "source"], "locale"=>"en"}
  
  
  
  Exception NoMethodError
  
  
  
  Error undefined method `call' for "result == false":String
  
  
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:165:in `block in halting'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:504:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:504:in `block in call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:504:in `each'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:504:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:778:in `_run_source_post_process_callbacks'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/paperclip-3.5.4/lib/paperclip/callbacks.rb:26:in `run_paperclip_callbacks'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/paperclip-3.5.4/lib/paperclip/attachment.rb:419:in `block in post_process'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:88:in `__run_callbacks__'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:778:in `_run_post_process_callbacks'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/paperclip-3.5.4/lib/paperclip/callbacks.rb:26:in `run_paperclip_callbacks'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/paperclip-3.5.4/lib/paperclip/attachment.rb:418:in `post_process'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/paperclip-3.5.4/lib/paperclip/attachment.rb:112:in `assign'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/paperclip-3.5.4/lib/paperclip/attachment.rb:322:in `reprocess!'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/delayed_paperclip-2.10.0/lib/delayed_paperclip/attachment.rb:68:in `process_delayed!'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/delayed_paperclip-2.10.0/lib/delayed_paperclip.rb:36:in `process_job'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/delayed_paperclip-2.10.0/lib/delayed_paperclip/jobs/active_job.rb:10:in `perform'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/execution.rb:32:in `block in perform_now'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:117:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:117:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:505:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:505:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:498:in `block (2 levels) in around'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:343:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:343:in `block (2 levels) in simple'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/i18n-0.8.1/lib/i18n.rb:257:in `with_locale'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/translation.rb:7:in `block (2 levels) in '
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:441:in `instance_exec'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:441:in `block in make_lambda'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:342:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:342:in `block in simple'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:497:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:497:in `block in around'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:505:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:505:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:498:in `block (2 levels) in around'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:343:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:343:in `block (2 levels) in simple'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/logging.rb:23:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/logging.rb:23:in `block (4 levels) in '
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/notifications.rb:164:in `block in instrument'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/notifications.rb:164:in `instrument'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/logging.rb:22:in `block (3 levels) in '
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/logging.rb:43:in `block in tag_logger'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/tagged_logging.rb:68:in `block in tagged'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/tagged_logging.rb:26:in `tagged'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/tagged_logging.rb:68:in `tagged'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/logging.rb:43:in `tag_logger'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/logging.rb:19:in `block (2 levels) in '
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:441:in `instance_exec'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:441:in `block in make_lambda'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:342:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:342:in `block in simple'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:497:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:497:in `block in around'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:505:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:505:in `call'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:778:in `_run_perform_callbacks'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551@global/gems/activesupport-4.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/execution.rb:31:in `perform_now'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/execution.rb:21:in `execute'
  
  /Users/antoniomarquis/.rvm/gems/ruby-1.9.3-p551/gems/activejob-4.2.8/lib/active_job/queue_adapters/resque_adapter.rb:46:in `perform'
  
  Powered by Resque v1.22.0
  
  Connected to Redis namespace resque on redis://127.0.0.1:6379/0

• Encoding error with Sidekiq

  14 mars 2017, par DavidK

  Im following this tutorial https://www.pubnub.com/blog/2015-12-08-building-video-sharing-app-server-messaging-ruby/ on Building a Video Sharing App. Its a bit outdated and Ive already had to fix a view issues to get this far but Im pretty lost now with this latest issue. I believe its something to do with sidekiq. When I try uploading a video it seems to work and shows up on the database, but I get a "Video is still being encoded." message.

  This is the log :

  2017-03-13T22:00:14.729Z 11109 TID-ova30dq94 WebmVideoEncoder JID-540aa74110e63e334a712719 INFO: fail: 0.122 sec
  
  2017-03-13T22:00:14.730Z 11109 TID-ova30dq94 WARN: {"context":"Job raised exception","job":{"class":"WebmVideoEncoder","args":[3],"retry":true,"queue":"default","jid":"540aa74110e63e334a712719","created_at":1489441065.533313,"enqueued_at":1489442414.60714,"error_message":"exception class/object expected","error_class":"TypeError","failed_at":1489441065.541595,"retry_count":6,"retried_at":1489442414.7293491},"jobstr":"{\"class\":\"WebmVideoEncoder\",\"args\":[3],\"retry\":true,\"queue\":\"default\",\"jid\":\"540aa74110e63e334a712719\",\"created_at\":1489441065.533313,\"enqueued_at\":1489442414.60714,\"error_message\":\"exception class/object expected\",\"error_class\":\"TypeError\",\"failed_at\":1489441065.541595,\"retry_count\":5,\"retried_at\":1489441667.7081149}"}
  
  2017-03-13T22:00:14.730Z 11109 TID-ova30dq94 WARN: TypeError: exception class/object expected
  
  2017-03-13T22:00:14.730Z 11109 TID-ova30dq94 WARN: /Users/David/rubyProjects/videouploader/videouploader/app/workers/webm_video_encoder.rb:14:in `raise'
  
  /Users/David/rubyProjects/videouploader/videouploader/app/workers/webm_video_encoder.rb:14:in `perform'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:158:in `execute_job'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:138:in `block (4 levels) in process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq.rb:36:in `block in '
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:133:in `block (3 levels) in process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:128:in `block in invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/bundler/gems/sidetiq-7bec4084165f/lib/sidetiq/middleware/history.rb:8:in `call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/retry_jobs.rb:74:in `call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/logging.rb:11:in `block in call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/logging.rb:32:in `with_context'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/logging.rb:7:in `call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:133:in `invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:132:in `block (2 levels) in process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:174:in `stats'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:131:in `block in process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/rails.rb:106:in `block in call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/execution_wrapper.rb:85:in `wrap'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/reloader.rb:68:in `block in wrap'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/execution_wrapper.rb:85:in `wrap'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/reloader.rb:67:in `wrap'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/rails.rb:105:in `call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:126:in `process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:82:in `process_one'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:70:in `run'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/util.rb:17:in `watchdog'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/util.rb:26:in `block in safe_thread'
  
  2017-03-13T22:00:50.877Z 11109 TID-ova3gyd4k ThumbnailCutter JID-d0c693e39e06c2cccdec7d33 INFO: start
  
  sh: -c: line 0: syntax error near unexpected token `('
  
  sh: -c: line 0: `ffmpeg -i /Users/David/rubyProjects/videouploader/videouploader/public/system/videos/video_files/000/000/002/original/Heart_of_Gold_-_Neil_Young_cover_with_harmonica.1_(1).mp4 -ss 00:00:01.000 -vframes 1 /tmp/1489442450881632.png'
  
  2017-03-13T22:00:50.902Z 11109 TID-ova3gyd4k ThumbnailCutter JID-d0c693e39e06c2cccdec7d33 INFO: fail: 0.025 sec
  
  2017-03-13T22:00:50.903Z 11109 TID-ova3gyd4k WARN: {"context":"Job raised exception","job":{"class":"ThumbnailCutter","args":[2],"retry":true,"queue":"default","jid":"d0c693e39e06c2cccdec7d33","created_at":1489437193.246615,"enqueued_at":1489442450.8759801,"error_message":"exception class/object expected","error_class":"TypeError","failed_at":1489437193.254677,"retry_count":7,"retried_at":1489442450.901133},"jobstr":"{\"class\":\"ThumbnailCutter\",\"args\":[2],\"retry\":true,\"queue\":\"default\",\"jid\":\"d0c693e39e06c2cccdec7d33\",\"created_at\":1489437193.246615,\"enqueued_at\":1489442450.8759801,\"error_message\":\"exception class/object expected\",\"error_class\":\"TypeError\",\"failed_at\":1489437193.254677,\"retry_count\":6,\"retried_at\":1489441044.6660218}"}
  
  2017-03-13T22:00:50.903Z 11109 TID-ova3gyd4k WARN: TypeError: exception class/object expected
  
  2017-03-13T22:00:50.903Z 11109 TID-ova3gyd4k WARN: /Users/David/rubyProjects/videouploader/videouploader/app/workers/thumbnail_cutter.rb:13:in `raise'
  
  /Users/David/rubyProjects/videouploader/videouploader/app/workers/thumbnail_cutter.rb:13:in `perform'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:158:in `execute_job'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:138:in `block (4 levels) in process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq.rb:36:in `block in '
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:133:in `block (3 levels) in process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:128:in `block in invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/bundler/gems/sidetiq-7bec4084165f/lib/sidetiq/middleware/history.rb:8:in `call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/retry_jobs.rb:74:in `call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/logging.rb:11:in `block in call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/logging.rb:32:in `with_context'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/logging.rb:7:in `call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:133:in `invoke'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:132:in `block (2 levels) in process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:174:in `stats'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:131:in `block in process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/rails.rb:106:in `block in call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/execution_wrapper.rb:85:in `wrap'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/reloader.rb:68:in `block in wrap'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/execution_wrapper.rb:85:in `wrap'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/reloader.rb:67:in `wrap'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/rails.rb:105:in `call'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:126:in `process'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:82:in `process_one'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:70:in `run'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/util.rb:17:in `watchdog'
  
  /Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/util.rb:26:in `block in safe_thread'

  thumbnail_cutter.rb

  class ThumbnailCutter
  
    include Sidekiq::Worker
  
  
  
    def perform(video_id)
  
      video = Video.find(video_id)
  
      output = "/tmp/#{Time.now.getutc.to_f.to_s.delete('.')}.png"
  
      _command = `ffmpeg -i #{video.video_file.path} -ss 00:00:01.000 -vframes 1 #{output}`
  
      if $?.to_i == 0
  
        video.thumbnail = File.open(output, 'r')
  
        video.save
  
        FileUtils.rm(output)
  
      else
  
        raise $?
  
      end
  
    end
  
  end