ruby-on-rails – 从AWS Elastic Transcoder作业中检索文件和缩

我有一个rails应用程序,使用他们的CORS配置将视频上传到AWS S3存储桶,当完成此操作并创建rails视频对象时,会创建Elastic Transcoder作业以将视频编码为.mp4格式并生成缩略图图像,AWS SNS可以在作业完成时发送推送通知.

这个过程都运行良好,我在上传完成时收到SNS通知,但是我可以很好地获取视频网址,但通知只包含缩略图模式而不是实际文件名.

以下是我从AWS SNS收到的典型通知. NB.这是来自输出哈希

{"id"=>"1","presetId"=>"1351620000001-000040","key"=>"uploads/video/150/557874e9-4c67-40f0-8f98-8c59506647e5/IMG_0587.mp4","thumbnailPattern"=>"uploads/video/150/557874e9-4c67-40f0-8f98-8c59506647e5/{count}IMG_0587","rotate"=>"auto","status"=>"Complete","statusDetail"=>"The transcoding job is completed.","duration"=>10,"width"=>202,"height"=>360}

正如您在thumbnailPattern下看到的那样,只是要使用的文件模式,而不是创建的实际文件.

有谁知道我如何获得通过弹性转码器和SNS创建的文件的URLS？

transcoder.rb#=>保存视频时,我会创建一个新的转码器对象

class Transcoder < Video
  def initialize(video)
    @video = video
    @directory = "uploads/video/#{@video.id}/#{SecureRandom.uuid}/"
    @filename = File.basename(@video.file,File.extname(@video.file))
  end

  def create
    transcoder = AWS::ElasticTranscoder::Client.new(region: "us-east-1")
    options = {
      pipeline_id: CONFIG[:aws_pipeline_id],input: { 
        key: @video.file.split("/")[3..-1].join("/"),# slice off the amazon.com bit 
        frame_rate: "auto",resolution: 'auto',aspect_ratio: 'auto',interlaced: 'auto',container: 'auto' 
        },outputs: [
        {
          key: "#{@filename}.mp4",preset_id: '1351620000001-000040',rotate: "auto",thumbnail_pattern: "{count}#{@filename}"
        }
      ],output_key_prefix: "#{@directory}"
    }
    job = transcoder.create_job(options)
    @video.job_id = job.data[:job][:id]
    @video.save!
  end
end

VideosController #create

class VideosController < ApplicationController
  def create
    @video = current_user.videos.build(params[:video])
    respond_to do |format|
      if @video.save
        transcode = Transcoder.new(@video)
        transcode.create
        format.html { redirect_to videos_path,notice: 'Video was successfully uploaded.' }
        format.json { render json: @video,status: :created,location: @video }
        format.js 
      else
        format.html { render action: "new" }
        format.json { render json: @video.errors,status: :unprocessable_entity }
      end
    end
  end
end