我正在使用 carrierwave 将电影上传到 amazon s3，效果非常好。

现在我想在上传时或上传后给电影加水印，我不知道，最好的方法是什么？

我试过这个:

movie_controller.rb Action 上传视频

movie = FFMPEG::Movie.new(@vid.video.url)

puts "........................................"
puts movie.inspect

if @vid.save

只是为了查明视频是否是从 stremio 中捕获的。

但后来我得到了找不到电影的错误，问题是它没有在 amazon s3 存储桶中查找，它在我的本地服务器上查找

No such file or directory - the file '/uploads/tmp/1462954331-3471-8766/VID-20160424-WA0013.mp4' does not exist

解决方案是什么？或者我应该在载波 uploader 中执行此操作？

更新:

当我在 .save 操作之后执行此操作时，它会查看 amazon s3 存储桶 .. 但还会说电影不存在。但如果我直接在浏览器中调用它，它就会显示出来。

更新代码:

#Laedt ein Video hoch
def uploadMovie
  @user = User.find_by_id session[:user_id]
  #Holt alle Channels für die er eine Berechtigung hat (Eingeloggter user)
  @user = User.find_by_id session[:user_id]
  @knowledgeproviderList = @user.knowledgeprovider
  @channels = Channel.where(knowledgeprovider_id:     @knowledgeproviderList.pluck(:id))
  @vid = Movie.new(movies_params)
  @channel = Channel.find(params[:vid][:channel_id])
  @vid.channel = @channel

  #Fügt dem Movie einen Tag hinzu
  createTag params
  createCategory params



  if @vid.save
    flash[:notice] = t("flash.saved")

    #movie = FFMPEG::Movie.new(@vid.video.url)

    #puts "........................................"
    #puts movie.inspect

    redirect_to :action => :add
   else
     redirect_to :action => :add
  end
 end

更新错误:

movie = FFMPEG::Movie.new(@vid.video.current_path)

options = {watermark: "mages/header.png", resolution: "640x360", watermark_filter: { position: "RT", padding_x: 10, padding_y: 10 } }
movie.transcode("movie.flv", options)

更新: 在 uploader 中添加代码:

  process :watermark_movie

     def watermark_movie
       if self.file.path
             options = {watermark: "images/header.png", resolution: "640x360", watermark_filter: { position: "RT", padding_x: 10, padding_y: 10 } }
             self.model.file = FFMPEG::Movie.new(self.file.path).transcode("#{root}/#{cache_dir}/#{self.cache_id}/file.mp4", options)
        end
      end

错误:

multi_json (1.12.0) lib/multi_json/adapter.rb:19:in `load'
multi_json (1.12.0) lib/multi_json.rb:122:in `load'
streamio-ffmpeg (2.0.0) lib/ffmpeg/movie.rb:28:in `initialize'
app/uploaders/movie_uploader.rb:40:in `new'
app/uploaders/movie_uploader.rb:40:in `watermark_movie'
carrierwave (0.11.2) lib/carrierwave/uploader/processing.rb:84:in `block in process!'
carrierwave (0.11.2) lib/carrierwave/uploader/processing.rb:76:in `each'
carrierwave (0.11.2) lib/carrierwave/uploader/processing.rb:76:in `process!'
carrierwave_backgrounder (0.4.2) lib/backgrounder/delay.rb:14:in `process!'
carrierwave (0.11.2) lib/carrierwave/uploader/callbacks.rb:18:in `block in with_callbacks'
carrierwave (0.11.2) lib/carrierwave/uploader/callbacks.rb:18:in `each'
carrierwave (0.11.2) lib/carrierwave/uploader/callbacks.rb:18:in `with_callbacks'
carrierwave (0.11.2) lib/carrierwave/uploader/cache.rb:134:in `cache!'
carrierwave (0.11.2) lib/carrierwave/mount.rb:329:in `cache'
carrierwave (0.11.2) lib/carrierwave/mount.rb:163:in `video='
carrierwave (0.11.2) lib/carrierwave/orm/activerecord.rb:39:in `video='
activerecord (4.2.1) lib/active_record/attribute_assignment.rb:54:in `public_send'
activerecord (4.2.1) lib/active_record/attribute_assignment.rb:54:in `_assign_attribute'
activerecord (4.2.1) lib/active_record/attribute_assignment.rb:41:in `block in assign_attributes'
actionpack (4.2.1) lib/action_controller/metal/strong_parameters.rb:183:in `each_pair'
actionpack (4.2.1) lib/action_controller/metal/strong_parameters.rb:183:in `each_pair'
activerecord (4.2.1) lib/active_record/attribute_assignment.rb:35:in `assign_attributes'
activerecord (4.2.1) lib/active_record/core.rb:559:in `init_attributes'
activerecord (4.2.1) lib/active_record/core.rb:281:in `initialize'
activerecord (4.2.1) lib/active_record/inheritance.rb:61:in `new'
activerecord (4.2.1) lib/active_record/inheritance.rb:61:in `new'
app/controllers/movies_controller.rb:71:in `uploadMovie'
actionpack (4.2.1) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.2.1) lib/abstract_controller/base.rb:198:in `process_action'
actionpack (4.2.1) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.2.1) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (4.2.1) lib/active_support/callbacks.rb:117:in `call'
activesupport (4.2.1) lib/active_support/callbacks.rb:117:in `call'
activesupport (4.2.1) lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
activesupport (4.2.1) lib/active_support/callbacks.rb:505:in `call'
activesupport (4.2.1) lib/active_support/callbacks.rb:505:in `call'
activesupport (4.2.1) lib/active_support/callbacks.rb:92:in `_run_callbacks'
activesupport (4.2.1) lib/active_support/callbacks.rb:776:in `_run_process_action_callbacks'
activesupport (4.2.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (4.2.1) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (4.2.1) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (4.2.1) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (4.2.1) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (4.2.1) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.2.1) lib/active_support/notifications.rb:164:in `instrument'
actionpack (4.2.1) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (4.2.1) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
activerecord (4.2.1) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (4.2.1) lib/abstract_controller/base.rb:137:in `process'
actionview (4.2.1) lib/action_view/rendering.rb:30:in `process'
actionpack (4.2.1) lib/action_controller/metal.rb:196:in `dispatch'
actionpack (4.2.1) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
actionpack (4.2.1) lib/action_controller/metal.rb:237:in `block in action'
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:74:in `call'
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:43:in `serve'
actionpack (4.2.1) lib/action_dispatch/journey/router.rb:43:in `block in serve'
actionpack (4.2.1) lib/action_dispatch/journey/router.rb:30:in `each'
actionpack (4.2.1) lib/action_dispatch/journey/router.rb:30:in `serve'
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:819:in `call'
rack (1.6.4) lib/rack/etag.rb:24:in `call'
rack (1.6.4) lib/rack/conditionalget.rb:38:in `call'
rack (1.6.4) lib/rack/head.rb:13:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/flash.rb:260:in `call'
rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/cookies.rb:560:in `call'
activerecord (4.2.1) lib/active_record/query_cache.rb:36:in `call'
activerecord (4.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call'
activerecord (4.2.1) lib/active_record/migration.rb:378:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.2.1) lib/active_support/callbacks.rb:88:in `call'
activesupport (4.2.1) lib/active_support/callbacks.rb:88:in `_run_callbacks'
activesupport (4.2.1) lib/active_support/callbacks.rb:776:in `_run_call_callbacks'
activesupport (4.2.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (4.2.1) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
web-console (2.3.0) lib/web_console/middleware.rb:20:in `block in call'
web-console (2.3.0) lib/web_console/middleware.rb:18:in `catch'
web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.2.1) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.1) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.1) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.1) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.1) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.1) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
rack (1.6.4) lib/rack/runtime.rb:18:in `call'
activesupport (4.2.1) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
actionpack (4.2.1) lib/action_dispatch/middleware/static.rb:113:in `call'
rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
railties (4.2.1) lib/rails/engine.rb:518:in `call'
railties (4.2.1) lib/rails/application.rb:164:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
rack (1.6.4) lib/rack/content_length.rb:15:in `call'
rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service'
/home/felix/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service'
/home/felix/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run'
/home/felix/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'

更新 -- 电影 uploader

# encoding: utf-8
class MovieUploader < CarrierWave::Uploader::Base

  # Include RMagick or MiniMagick support:
  # include CarrierWave::RMagick
  include CarrierWave::MiniMagick
  include CarrierWave::Video
  include CarrierWave::Video::Thumbnailer
  include CarrierWave::Backgrounder::Delay

  require 'rubygems'
  require 'streamio-ffmpeg'

  # Choose what kind of storage to use for this uploader:
  storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  process :watermark_movie

  def watermark_movie
    puts "ssssssssssssssssssssssssssssssssss"
    puts self.file.inspect

    if self.file.path
      options = {watermark: "http://felix-hohlwegler.de/holz-soft/include/designs/design13/images/header.png", resolution: "640x360", watermark_filter: { position: "RT", padding_x: 10, padding_y: 10 } }
      self.model.file = FFMPEG::Movie.new(self.file.path).transcode("#{root}/#{cache_dir}/#{self.cache_id}/file.mp4", options)
    end
  end

  version :thumb do
    process thumbnail: [{format: 'png', quality: 10, size: 1200, strip: false, seek: 10, 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


  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
   def extension_white_list
     %w(mov avi mkv mpeg mpeg2 mp4 3gp)
   end
end

最佳答案

我们在处理音频的应用程序中做了类似的事情。显然，我们不使用视频或水印，但我们使用 streamio-ffmpeg 进行一些转码。

与其在 Controller 中编写与水印相关的代码，不如将该功能移至 uploader 。例如，我们的 convert_to_mp3 方法可能是您的水印方法。看起来这可能会解决您的问题。

# encoding: utf-8
require 'streamio-ffmpeg'

class FileUploader < CarrierWave::Uploader::Base

  # Choose what kind of storage to use for this uploader:
  storage :fog

  before :store, :remember_cache_id
  after :store, :delete_tmp_dir

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  # Process files as they are uploaded:
  process :convert_to_mp3

  def convert_to_mp3
    if self.file.path
      if self.file.extension == 'm4a' || self.file.extension == 'wav' || self.file.extension == 'aac'
        self.model.file = FFMPEG::Movie.new(self.file.path).transcode("#{root}/#{cache_dir}/#{self.cache_id}/file.mp3", options_string)
      end
    end
  end

  def options_string
    if self.file.extension == 'm4a'
      "-acodec libmp3lame -write_xing 0"
    elsif self.file.extension == 'aac'
      "-acodec libmp3lame -write_xing 0"
    elsif self.file.extension == 'wav'
      "-acodec libmp3lame -write_xing 0"
    end
  end


  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  def extension_white_list
    %w(mp3 m4a wav)
  end

  def cache_id
    @cache_id
  end

  def remember_cache_id(new_file)
    @cache_id_was = cache_id
  end

  def delete_tmp_dir(new_file)
    # make sure we don't delete other things accidentally by checking the name pattern
    if @cache_id_was.present? && @cache_id_was =~ /\A[\d]{8}\-[\d]{4}\-[\d]+\-[\d]{4}\z/
      FileUtils.rm_rf(File.join(root, cache_dir, @cache_id_was))
    end
  end

end

关于ruby-on-rails - Rails 在上传时使用 stremio-ffmpeg gem 给电影加水印，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37156802/