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• FFMPEG - Long pause in av_read_frame

  5 décembre 2018, par comwizz2

  I am trying to write a service that converts a m3u8 link from youtube.

  I am loading the stream info then setting all but 1 video and 1 audio stream to AVDISCARD_ALL.

  Everything works fine except after several seconds of playing av_read_frame blocks for 30 seconds to a couple minutes.

  I’m not the best versed in ffmpeg so I’m not exactly sure what to do from here.
  Extracting one of these links into ffplay works fine it seems, but I don’t see what they may be doing differently ? I’m just hoping someone can point me in the right direction of anything to try.

  Attached is a callstack from when this is happening. I am not sure if anything here looks amiss.

  

• Problems with slowing down when grid synthesis operation request via ffmpeg is received simultaneously

  7 novembre 2022, par bongcheol Kim
  

  1. Crop/scaling/volume leveling encoding of videos uploaded by users in S3 with predetermined settings

  


  2. Synthesize in grid form with other pre-prepared videos.

  


  


  Perform the above tasks through ffmpeg.
Encoding slows down when multiple requests occur simultaneously.
(Maybe it's because we shared the server's resources.)

  


  To process task requests from 1 and 2 at the same time, but to process them
What can I do ?

  


  Is there a service on AWS that can solve my problems ?

  


  I thought about creating and processing ec2 individually for each request, but is this possible ?

  


  

  1. Invoke API

  


  2. Create EC2

  


  3. Proceed with one encoding operation on the corresponding EC2

  


  4. Delete EC2 after uploading s3

  


  


• Uploading video with Rails/Paperclip to Heroku/S3

  17 octobre 2015, par Corey Tegeler

  I’ve been failing at uploading a video in production mode on Heroku for way too long, testing local works great with resizing and thumbnail creation. Images also work fine going to my S3 bucket, so the credentials are all okay.

  Here are the logs I usually get from the code used below. Incidentally, the attempt right before I got these logs (without changing any code and using the same test video), the video made it to AWS, just without the resizing or thumbnail creation. But that was the only time I have even made it that far, and this failed upload and 500 error immediately happened after.

  $ heroku logs

  2015-08-06T15:38:39.732913+00:00 app[web.1]: Started POST "/work/create" for 104.162.101.0 at 2015-08-06 15:38:39 +0000
  
  2015-08-06T15:38:39.696998+00:00 app[web.1]: source=rack-timeout id=dd06eb06-cad5-4236-8788-e5f59f7fe631 wait=7850ms timeout=15000ms service=0ms state=active
  
  2015-08-06T15:38:39.734677+00:00 app[web.1]: Processing by WorksController#create as HTML
  
  2015-08-06T15:38:39.734744+00:00 app[web.1]:   Parameters: {"utf8"=>"✓", "authenticity_token"=>"9edyQVZm68aW+majARmNcDR1dwpE59ZrWEZ4/G07ADYhlZyYiJ+RwYK4GBguQZbrlS6J4yDbMsMIxcvWLD3aUA==", "work"=>{"position"=>"", "media_type"=>"video", "video"=>#, @original_filename="FA14 final_compilation_mg4d_H.264.mp4", @content_type="video/mp4", @headers="Content-Disposition: form-data; name=\"work[video]\"; filename=\"FA14 final_compilation_mg4d_H.264.mp4\"\r\nContent-Type: video/mp4\r\n">, "designer"=>""}}
  
  2015-08-06T15:38:40.030596+00:00 heroku[router]: at=info method=POST path="/work/create" host=purchasedesign.herokuapp.com request_id=dd06eb06-cad5-4236-8788-e5f59f7fe631 fwd="104.162.101.0" dyno=web.1 connect=1ms service=8181ms status=500 bytes=192
  
  2015-08-06T15:38:40.017315+00:00 app[web.1]: Command :: file -b --mime '/tmp/9b4d56c6bf75dc6718768cda6940025a20150806-3-14gq1uq.mp4'
  
  2015-08-06T15:38:40.025037+00:00 app[web.1]: [AV] Running command: if command -v ffmpeg 2>/dev/null; then echo "true"; else echo "false"; fi
  
  2015-08-06T15:38:40.028329+00:00 app[web.1]: 
  
  2015-08-06T15:38:40.028332+00:00 app[web.1]: Av::UnableToDetect (Unable to detect any supported library):
  
  2015-08-06T15:38:40.028333+00:00 app[web.1]:   app/controllers/works_controller.rb:18:in `create'
  
  2015-08-06T15:38:40.028335+00:00 app[web.1]: 
  
  2015-08-06T15:38:40.028336+00:00 app[web.1]: 
  
  2015-08-06T15:38:40.028629+00:00 app[web.1]: source=rack-timeout id=dd06eb06-cad5-4236-8788-e5f59f7fe631 wait=7850ms timeout=15000ms service=332ms state=completed
  
  2015-08-06T15:38:40.023226+00:00 app[web.1]: [AV] Running command: if command -v avprobe 2>/dev/null; then echo "true"; else echo "false"; fi
  
  2015-08-06T15:38:40.027118+00:00 app[web.1]: Completed 500 Internal Server Error in 292ms

  models/work.rb

  has_attached_file :video,
  
      :styles => {
  
          :mp4 => {
  
              :geometry => "640x480",
  
              :format => 'mp4',
  
          },
  
          :thumb => {
  
              :geometry => '300x300',
  
              :format => 'jpg',
  
              :time => 10
  
          }
  
      },
  
      :processors => [:transcoder]

  Gemfile

  gem 'aws-sdk', '< 2.0'
  
  gem 'paperclip', '~> 4.2'
  
  gem 'paperclip-ffmpeg', '~> 1.0.0'
  
  gem 'paperclip-av-transcoder'
  
  gem 'delayed_paperclip'
  
  gem 'rmagick', '~> 2.13.4'

  config/environments/production.rb

  config.paperclip_defaults = {
  
     :storage => :s3,
  
     :s3_credentials => {
  
       :bucket => ENV['S3_BUCKET_NAME'],
  
       :access_key_id => ENV['AWS_ACCESS_KEY_ID'],
  
       :secret_access_key => ENV['AWS_SECRET_ACCESS_KEY']
  
     }
  
  }

  Any help would be incredible