从 AWS Elastic Transcoder 作业中检索文件和缩略图 url

http://docs.aws.amazon.com/elastictranscoder/latest/developerguide/create-job.html#create-job-exampleshttp://docs.aws.amazon.com/elastictranscoder/latest/developerguide/notifications.html因为您的缩略图的基本路径/名称是已知的，并且序列号将始终从 00001 开始，您可以从那里迭代以确定在作业完成时是否存在/有多少缩略图存在.确保对 S3 中的对象使用 HEAD 请求来确定它们的存在；它比执行 LIST 请求大约便宜 10 倍.I have a rails app which uploads videos to an AWS S3 bucket using their CORS configuration, when this is completed and the rails video object is created an Elastic Transcoder job is created to encode the video to .mp4 format and generate a thumbnail image, AWS SNS is enabled to send push notifications when the job is complete.The process all works nicely and I receive a SNS notification when the upload is complete, however I can fetch the video url just fine but the notification only contains the thumbnail pattern rather than the actual filename.Below is a typical notification I receive from AWS SNS. NB. This is from the outputs hash{"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}As you can see under thumbnailPattern is just the filepattern to use, and not the actual file created.Does anyone know how I can get the URLS to the files created over elastic transcoder and SNS?transcoder.rb # => I create a new transcoder object when a video has been savedclass 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! endendVideosController #createclass 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 endend 解决方案 It doesn't appear that the actual name of the thumbnails are passed back, either from SNS notifications or from the request response upon creation of a job:http://docs.aws.amazon.com/elastictranscoder/latest/developerguide/create-job.html#create-job-exampleshttp://docs.aws.amazon.com/elastictranscoder/latest/developerguide/notifications.htmlBecause the base path/name of your thumbnails is known, and the sequence number will always start at 00001, you can iterate from there to determine if/how many of the thumbnails exist upon job completion. Ensure you use HEAD requests against the objects in S3 to determine their presence; its about 10x cheaper than doing a LIST request. 这篇关于从 AWS Elastic Transcoder 作业中检索文件和缩略图 url的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 1403页，肝出来的..