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• How to "filter" a file through command line before apache sends it to client ?

  1er septembre 2020, par Timothe Jahan

  I have large collection of video files which are available on our website.
For each video we have multiple quality and language, so in order to save space we store only 1 file, which contains all audio and video tracks.

  


  Our streaming server can handle these multitrack files in order to serve only the useful part to each user, but we also make them available for download through the apache web server.
Currently, when a user request a file (certain quality, certain language), we first create a temporary file with only his needs, and give him for download.
I would like to remove this intermediate step and extract on the fly.
Extraction can be done by ffmpeg, but I need to have apache "pipe" the file through ffmpeg before sending the bytes out. Do you have any way of doing this.

  


  example :

  


  


  Filename_multi.mp4 [SD,HD,fr,en,ru]
User request : Filename_HD_fr.mp4 [HD,fr]
Apache fetch the file Filename_multi.mp4 and pipe it through an ffmpeg command and send the bytes as > they are encoded, not waiting for the end.

  


  


  Note this is on linux, and the ffmpeg part is not a problem.

  


  Thx
Timothé

  


• Different results using qt-faststart and "ffmpeg -movflags +faststart"

  31 mars 2020, par Juan Ignacio Sánchez

  I have a set of videos generated by security cameras, which have the MOOV atom at the end of the file, like this :

  ftyp (32 bytes)
  
  free (8 bytes)
  
  mdat (29647845 bytes)
  
  moov (42054 bytes)

  I want to serve these files using progressive downloads (pseudo streaming) and it’s the only acceptable way to do it.

  Knowing that I tried to use tools like qt-faststart or directly ffmpeg with the corresponding flags (-movflags +faststart). Other detail is that I’m running this on a low profile machine, and FFmpeg takes like 6 8 seconds to finish (even using -c copy) and the other tool results to be much more efficient since it only moves some bytes, taking less than a second to finish. The thing here is that qt-faststart produces a video that can’t be pseudo streamed but ffmpeg does it. Here are some comparisons :

  ffmpeg :

  ftyp (32 bytes)
  
  moov (42422 bytes)
  
  free (8 bytes)
  
  mdat (29647845 bytes)

  qt-faststart :

  ftyp (32 bytes)
  
  moov (42054 bytes)
  
  free (8 bytes)
  
  mdat (29647845 bytes)

  As you can see, FFmpeg adds some extra bytes on the MOOV atom, can anyone point me in some research direction ? Thank you all.

• Ruby on Rails - Paperclip - ffmpeg - throws error when adding style to "has_attached_file"

  4 octobre 2018, par TamerB

  I’m working on image and video upload in a rails app using paperclip and ffmpeg.

  The following code in models/image.rb is working fine :

  has_attached_file :image,
  
  processors: [:ffmpeg]
  
  validates_attachment_content_type :image, content_type: /.*/

  But, when I add styling to the code as follows, it throws an error on (page loading) :

  has_attached_file :image, styles: lambda {|a| if a.instance.is_image? then {original: {}, medium: "300x300>"} end},
  
  processors: [:ffmpeg]
  
  validates_attachment_content_type :image, content_type: /.*/
  
  
  
  def is_image?
  
    return false unless @attachment_image.content_type
  
    ['image/jpeg', 'image/pjpeg', 'image/gif', 'image/png', 'image/x-png', 'image/jpg'].include?(@attachment_image.content_type)
  
  end

  The error is as follows :

  F, [2018-10-04T15:04:47.381706 #9836] FATAL -- : [643e7428-d41e-4000-9a48-566d85e7b109]   
  
  F, [2018-10-04T15:04:47.381906 #9836] FATAL -- : [643e7428-d41e-4000-9a48-566d85e7b109] ActionView::Template::Error (undefined method `each_pair' for nil:NilClass):
  
  F, [2018-10-04T15:04:47.382186 #9836] FATAL -- : [643e7428-d41e-4000-9a48-566d85e7b109]     1: insert_tag renderer_for(:show)
  
  F, [2018-10-04T15:04:47.382345 #9836] FATAL -- : [643e7428-d41e-4000-9a48-566d85e7b109]   
  
  F, [2018-10-04T15:04:47.382441 #9836] FATAL -- : [643e7428-d41e-4000-9a48-566d85e7b109] app/admin/resorts.rb:46:in `block (5 levels) in <top>'
  
  </top>

  How can I solve this ?

  Update

  This error is displayed only when trying to upload a video or or trying to load a page containing a video.

  The code in pp/admin/resorts.rb mentioned in the error message is the following (I’m using activeadmin gem) :

  if im.itype == 'video-slider' then
  
      video_tag im.image, class: 'my_image_size' # line 46
  
  else
  
      image_tag im.image, class: 'my_image_size'
  
  end

  When trying to upload an image, the error changed to be as follows () :

  Input #0, image2, from '/tmp/dcdc7c452102ec2b9255973f59b40ee320181004-23173-fx7vzi.jpg':
  
  Duration: 00:00:00.04, start: 0.000000, bitrate: 35614 kb/s
  
  Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080, 25 tbr, 25 tbn, 25 tbc
  
  [NULL @ 0x564aeb7df580] Unable to find a suitable output format for '/tmp/dcdc7c452102ec2b9255973f59b40ee320181004-23173-fx7vzi20181004-23173-zurkvx'
  
  /tmp/dcdc7c452102ec2b9255973f59b40ee320181004-23173-fx7vzi20181004-23173-zurkvx: Invalid argument
  
  ):
  
  F, [2018-10-04T19:13:02.028565 #23173] FATAL -- : [c267e57b-7e06-4624-be1c-0d9aa4b71e00]   
  
  F, [2018-10-04T19:13:02.028730 #23173] FATAL -- : [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip-ffmpeg (1.2.0) lib/paperclip_processors/ffmpeg.rb:175:in `rescue in make'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip-ffmpeg (1.2.0) lib/paperclip_processors/ffmpeg.rb:171:in `make'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/processor.rb:34:in `make'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:533:in `block in post_process_style'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:532:in `each'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:532:in `reduce'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:532:in `post_process_style'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:519:in `post_process_styles'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:512:in `block (2 levels) in post_process'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/callbacks.rb:131:in `run_callbacks'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/callbacks.rb:38:in `run_paperclip_callbacks'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:510:in `block in post_process'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/callbacks.rb:97:in `run_callbacks'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/callbacks.rb:38:in `run_paperclip_callbacks'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:509:in `post_process'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:465:in `post_process_file'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/attachment.rb:113:in `assign'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] paperclip (5.2.1) lib/paperclip/has_attached_file.rb:66:in `block in define_setter'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activemodel (5.1.5) lib/active_model/attribute_assignment.rb:46:in `public_send'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activemodel (5.1.5) lib/active_model/attribute_assignment.rb:46:in `_assign_attribute'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activemodel (5.1.5) lib/active_model/attribute_assignment.rb:40:in `block in _assign_attributes'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activemodel (5.1.5) lib/active_model/attribute_assignment.rb:39:in `each'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activemodel (5.1.5) lib/active_model/attribute_assignment.rb:39:in `_assign_attributes'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activerecord (5.1.5) lib/active_record/attribute_assignment.rb:26:in `_assign_attributes'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activemodel (5.1.5) lib/active_model/attribute_assignment.rb:33:in `assign_attributes'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activerecord (5.1.5) lib/active_record/core.rb:337:in `initialize'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activerecord (5.1.5) lib/active_record/inheritance.rb:66:in `new'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activerecord (5.1.5) lib/active_record/inheritance.rb:66:in `new'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activeadmin (1.1.0) lib/active_admin/resource_controller/data_access.rb:130:in `build_new_resource'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activeadmin (1.1.0) lib/active_admin/resource_controller/data_access.rb:116:in `build_resource'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] inherited_resources (1.8.0) lib/inherited_resources/actions.rb:31:in `create'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/abstract_controller/base.rb:186:in `process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_controller/metal/rendering.rb:30:in `process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/callbacks.rb:131:in `run_callbacks'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/abstract_controller/callbacks.rb:19:in `process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_controller/metal/rescue.rb:20:in `process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/notifications.rb:166:in `block in instrument'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/notifications.rb:166:in `instrument'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_controller/metal/params_wrapper.rb:252:in `process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] searchkick (3.0.0) lib/searchkick/logging.rb:209:in `process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activerecord (5.1.5) lib/active_record/railties/controller_runtime.rb:22:in `process_action'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/abstract_controller/base.rb:124:in `process'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionview (5.1.5) lib/action_view/rendering.rb:30:in `process'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_controller/metal.rb:189:in `dispatch'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_controller/metal.rb:253:in `dispatch'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/routing/route_set.rb:49:in `dispatch'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/routing/route_set.rb:31:in `serve'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/journey/router.rb:50:in `block in serve'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/journey/router.rb:33:in `each'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/journey/router.rb:33:in `serve'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/routing/route_set.rb:844:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] omniauth (1.8.1) lib/omniauth/strategy.rb:190:in `call!'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] omniauth (1.8.1) lib/omniauth/strategy.rb:168:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] omniauth (1.8.1) lib/omniauth/strategy.rb:190:in `call!'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] omniauth (1.8.1) lib/omniauth/strategy.rb:168:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] omniauth (1.8.1) lib/omniauth/strategy.rb:190:in `call!'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] omniauth (1.8.1) lib/omniauth/strategy.rb:168:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] warden (1.2.7) lib/warden/manager.rb:36:in `block in call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] warden (1.2.7) lib/warden/manager.rb:35:in `catch'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] warden (1.2.7) lib/warden/manager.rb:35:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] rack (2.0.5) lib/rack/etag.rb:25:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] rack (2.0.5) lib/rack/conditional_get.rb:38:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] rack (2.0.5) lib/rack/head.rb:12:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] rack (2.0.5) lib/rack/session/abstract/id.rb:232:in `context'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] rack (2.0.5) lib/rack/session/abstract/id.rb:226:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/cookies.rb:613:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activerecord (5.1.5) lib/active_record/migration.rb:556:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/callbacks.rb:26:in `block in call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/callbacks.rb:97:in `run_callbacks'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/callbacks.rb:24:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/debug_exceptions.rb:59:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] web-console (3.5.1) lib/web_console/middleware.rb:135:in `call_app'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] web-console (3.5.1) lib/web_console/middleware.rb:28:in `block in call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] web-console (3.5.1) lib/web_console/middleware.rb:18:in `catch'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] web-console (3.5.1) lib/web_console/middleware.rb:18:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] railties (5.1.5) lib/rails/rack/logger.rb:36:in `call_app'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] railties (5.1.5) lib/rails/rack/logger.rb:24:in `block in call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/tagged_logging.rb:69:in `block in tagged'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/tagged_logging.rb:26:in `tagged'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/tagged_logging.rb:69:in `tagged'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] railties (5.1.5) lib/rails/rack/logger.rb:24:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] request_store (1.4.0) lib/request_store/middleware.rb:19:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/request_id.rb:25:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] rack (2.0.5) lib/rack/method_override.rb:22:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] rack (2.0.5) lib/rack/runtime.rb:22:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] activesupport (5.1.5) lib/active_support/cache/strategy/local_cache_middleware.rb:27:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/executor.rb:12:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] actionpack (5.1.5) lib/action_dispatch/middleware/static.rb:125:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] rack (2.0.5) lib/rack/sendfile.rb:111:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] railties (5.1.5) lib/rails/engine.rb:522:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] puma (3.11.2) lib/puma/configuration.rb:225:in `call'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] puma (3.11.2) lib/puma/server.rb:624:in `handle_request'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] puma (3.11.2) lib/puma/server.rb:438:in `process_client'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] puma (3.11.2) lib/puma/server.rb:302:in `block in run'
  
  [c267e57b-7e06-4624-be1c-0d9aa4b71e00] puma (3.11.2) lib/puma/thread_pool.rb:120:in `block in spawn_thread'