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• 400 Bad Request Error uploading paperclip videos

  5 mars 2017, par jalen201

  Im trying to upload videos with paperclip. When i hit the submit button i receive.

  RSolr::Error::Http - 400 Bad Request Error: 

  this is the migration

  class AddAttachmentVideoToPins < ActiveRecord::Migration
  
    def self.up
  
      change_table :pins do |t|
  
        t.attachment :video
  
      end
  
    end
  
  
  
    def self.down
  
      remove_attachment :pins, :video
  
    end
  
  end

  Heres the model

  class Pin < ApplicationRecord
  
    acts_as_votable
  
    belongs_to :user
  
    has_many :comments
  
  
  
    searchable do
  
      text :title, :boost => 5
  
      text :description
  
    end
  
  
  
    has_attached_file :image, styles: {medium: "300x300>" }
  
    validates_attachment_content_type :image, content_type: /\Aimage\/.*\z/
  
  
  
    has_attached_file :video, styles: {
  
      :medium => {
  
        :geometry => "640x480",
  
        :format => 'mp4'
  
      },
  
      :thumb => { 
  
        :geometry => "160x120", :format => 'jpeg', :time => 10 
  
      }
  
    },
  
    :processors => [:transcoder]
  
  
  
    validates_attachment_content_type :video, content_type:  /\Avideo\/.*\Z/

  also i added these 4 gems, and installed ffmpeg with homebrew

      gem 'paperclip', '~> 5.1'
  
  
  
      gem 'aws-sdk', '~> 2.8'
  
  
  
      gem 'paperclip-av-transcoder', '~> 0.6.4'
  
  
  
      gem 'paperclip-ffmpeg', '~> 1.2'

  lastly this is my controller, i added :video as a strong parameter.

  class PinsController < ApplicationController
  
  
  
    before_action :find_pin, only: [:show,:edit,:update,:destroy, :upvote]
  
    before_action :authenticate_user!, except: [:index,:show]
  
  
  
    def index
  
      @search = Pin.search do
  
        fulltext params[:search]
  
      end
  
      @pins = @search.results
  
    end
  
  
  
    def new
  
      @pin = current_user.pins.build
  
    end
  
  
  
    def show
  
      @comments = Comment.where(pin_id: @pin).order('created_at DESC')
  
    end
  
  
  
    def edit
  
      @lookup = User.all
  
    end
  
  
  
    def profile
  
      @users = User.all
  
      if User.find_by_username(params[:id])
  
        @username = params[:id]
  
        @user = User.find_by_username(params[:id])
  
      else
  
        redirect_to root_path
  
      end
  
      @user_pin = Pin.all.where('user_id = ?',       User.find_by_username(params[:id]).id)
  
    end
  
  
  
    def update
  
      if @pin.update(pin_params)
  
        redirect_to @pin, notice: "Pin was succesfully updated"
  
      else
  
        render 'edit'
  
      end
  
    end
  
  
  
    def destroy
  
      @pin.destroy
  
      redirect_to root_path       
  
    end
  
  
  
    def upvote
  
      @pin.upvote_by current_user
  
      redirect_to :back
  
    end
  
  
  
    def create
  
      @pin = current_user.pins.build (pin_params)
  
  
  
      if @pin.save
  
        redirect_to @pin , notice: "Succesfully created new pin"
  
      else
  
        render 'new'
  
      end
  
    end
  
  
  
    private
  
  
  
    def pin_params
  
      params.require(:pin).permit(:title, :description, :image, :video)
  
    end
  
  
  
    def find_pin
  
      @pin = Pin.find(params[:id])
  
    end
  
  end

  i added this in the view

  <%= video_tag @pin.video.url(:medium), controls: true, style: "max-width: 100%;" %>

  If anyone could help that would be greatly appreciated

• saving ffmpeg output in a file field in django using tempfiles

  27 janvier 2017, par StarLord

  I am trying to extract audio from video when uploaded, and store it in a different model.

  this is the task code :

  def set_metadata(input_file, video_id):
  
      """
  
      Takes the file path and video id, sets the metadata and audio
  
      :param input_file: file url or file path
  
      :param video_id: video id of the file
  
      :return: True
  
      """
  
      # extract metadata
  
      command = [FFPROBE_BIN,
  
                 '-v', 'quiet',
  
                 '-print_format', 'json',
  
                 '-show_format',
  
                 '-show_streams',
  
                 '-select_streams', 'v:0',
  
                 input_file]
  
      output = sp.check_output(command)
  
      output = output.decode('utf-8')
  
      metadata_output = json.loads(output)
  
      video_instance = Video.objects.get(pk=video_id)
  
      stream = metadata_output['streams'][0]
  
      tot_frames_junk = int(stream['avg_frame_rate'].split("/")[0])
  
      tot_time_junk = int(stream['avg_frame_rate'].split("/")[1])
  
      # update the video model with newly acquired metadata
  
      video_instance.width = stream['width']
  
      video_instance.height = stream['height']
  
      video_instance.frame_rate = tot_frames_junk/tot_time_junk
  
      video_instance.duration = stream['duration']
  
      video_instance.total_frames = stream['nb_frames']
  
      video_instance.video_codec = stream['codec_name']
  
      video_instance.save()
  
  
  
      # extract audio
  
      tmpfile = temp.NamedTemporaryFile(suffix='.mp2')
  
      command = ['ffmpeg',
  
                 '-y',
  
                 '-i', input_file,
  
                 '-loglevel', 'quiet',
  
                 '-acodec', 'copy',
  
                 tmpfile.name]
  
      sp.check_output(command)
  
      audio_obj = Audio.objects.create(title='awesome', audio=tmpfile)
  
      audio_obj.save()

  I am passing video object id and the file path to the method. The file path is a url from azure storage.

  The part where I am processing for metadata, it works and the video object gets updated. But the audio model is not created.

  It throws this error :

  AttributeError("'_io.BufferedRandom' object has no attribute '_committed'",)

  at command :

  audio_obj = Audio.objects.create(title='awesome', audio=tmpfile)

  What am I doing wrong with the temp file.

• FPS drop in FFMPEG streaming processes to FB from production server

  30 janvier 2017, par Aakash Gupta

  I have made a rails app that can stream live videos to facebook rtmp server and deployed it on AWS. I have used nginx as web server. The major problem that I am encountering after viewing log files of FFMpeg processes is that sometimes the FPS of FFmpeg process starts to drop. In some cases, it remains stable at 25 FPS but in some cases, it remains at 25 only for sometime, and after that it starts to drop and sometimes it falls to even 3-4 FPS which is unacceptable during live streaming. As FFMpeg process is quite heavy, I would also like to share my CPU info as well.

  CPU information is :

  cat /proc/cpuinfo
processor   : 0
vendor_id   : GenuineIntel
cpu family  : 6
model       : 63
model name  : Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHz
stepping    : 2
microcode   : 0x25
cpu MHz     : 2400.070
cache size  : 30720 KB
physical id : 0
siblings    : 1
core id     : 0
cpu cores   : 1
apicid      : 0
initial apicid  : 0
fpu     : yes
fpu_exception   : yes
cpuid level : 13
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm xsaveopt fsgsbase bmi1 avx2 smep bmi2 erms invpcid
bogomips    : 4800.14
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

  FFMPEG log file with unstable fps : https://drive.google.com/open?id=0B1gtp1iXJppkUndFamk4M0lRYzA

  FFMPEG log file with stable fps : https://drive.google.com/open?id=0B1gtp1iXJppkMkVCZEJjYWJrVTA

  When FPS was stable, I also tried to run another parallel FFMpeg process from the same server which resulted in FPS dropping of both the processes to 13-14 FPS.

  I am currently using this FFMPEG command :

  ffmpeg -loop 1 -re -y -f image2 -i "image_path" -i "audio_path.aac" -acodec copy -bsf:a aac_adtstoasc -pix_fmt yuv420p -profile:v high -s 1280x720 -vb 400k -maxrate 400k -minrate 400k -bufsize 600k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 30 -t 14400 -strict -2 -f flv "rtmp_server_link"

  I never face this problem when I try to stream to FB using app on my localhost.

  So, my questions are :

  1. What can be the reason for this FPS drop ?
  2. Can upscaling production server help me fix this issue ?
  3. Can I run multiple FFMpeg processes for streaming from same server without performance drop ?

  Thanks in advance :)