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• 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.

• ffmpeg disconnects from the HTTP server

  29 janvier 2017, par Frédéric Lopes

  I am facing to a problem that I cannot solve for days now and cannot find any answer over internet..

  I am currently working on a live streaming & IoT project through internet in order to access to indoor items and see through a webcam. I am using Node.js for the server side and using a mpeg1video decoder working with WebSocket (https://github.com/phoboslab/jsmpeg).

  All the server side (HTTP + WebSocket server) and client side are working properly (I see the clients connecting and waiting for sockets) but when I try to stream a video (or a camera) ffmpeg is not keeping the connection with my HTTP server, the connection is established but it is disconnected 1 second after being connected... Here is the terminal outputs gathered :

  if( process.argv.length < 4 ) {
  
      console.log(
  
          'Usage: \n' +
  
          'node stream-server.js [ ]'
  
      );
  
      process.exit();
  
  }
  
  
  
  var STREAM_PORT = process.argv[2] || 8080,
  
          WEBSOCKET_PORT = process.argv[3] || 8081,
  
          STREAM_MAGIC_BYTES = 'jsmp'; // Must be 4 bytes
  
  
  
  var width = 320,
  
          height = 240;
  
  
  
  // Websocket Server
  
  var socketServer = new (require('ws').Server)({port: WEBSOCKET_PORT});
  
  socketServer.on('connection', function(socket) {
  
      // Send magic bytes and video size to the newly connected socket
  
      // struct { char magic[4]; unsigned short width, height;}
  
      var streamHeader = new Buffer(8);
  
      streamHeader.write(STREAM_MAGIC_BYTES);
  
      streamHeader.writeUInt16BE(width, 4);
  
      streamHeader.writeUInt16BE(height, 6);
  
      socket.send(streamHeader, {binary:true});
  
  
  
      console.log('New WebSocket Connection ('+socketServer.clients.length+' total)');
  
  
  
      socket.on('close', function(code, message){
  
          console.log( 'Disconnected WebSocket ('+socketServer.clients.length+' total)' );
  
      });
  
  });
  
  
  
  socketServer.broadcast = function(data, opts) {
  
      for( var i in this.clients ) {
  
          if (this.clients[i].readyState == 1) {
  
              this.clients[i].send(data, opts);
  
          }
  
          else {
  
              console.log( 'Error: Client ('+i+') not connected.' );
  
          }
  
      }
  
  };
  
  
  
  // HTTP Server to accept incomming MPEG Stream
  
  var streamConnected = false;
  
  var streamServer = require('http').createServer(function(request, response) {
  
      response.connection.setTimeout(0);
  
      if(streamConnected) {
  
          response.end();
  
          return;
  
      }
  
      streamConnected = true;
  
  
  
      var params = request.url.substr(1).split('/');
  
  
  
      width = (params[0] || 320)|0;
  
      height = (params[1] || 240)|0;
  
  
  
      console.log(
  
          'Stream Connected: ' + request.socket.remoteAddress +
  
          ':' + request.socket.remotePort + ' size: ' + width + 'x' + height
  
      );
  
  
  
      request.on('data', function(data){
  
          socketServer.broadcast(data, {binary:true});
  
      });
  
  
  
      request.on('close', function(data){
  
          console.log("Stream disconnected");
  
          streamConnected = false;
  
      });
  
  
  
  }).listen(STREAM_PORT);
  
  
  
  console.log('Listening for MPEG Stream on http://127.0.0.1:'+STREAM_PORT+'/<width>/<height>');
  
  console.log('Awaiting WebSocket connections on ws://127.0.0.1:'+WEBSOCKET_PORT+'/');
  
  </height></width>

  Once the server running, I am using the command line to send my video to the http server :

  ffmpeg -f mp4 -i in.mp4 -f mpeg1video -r 30 http://127.0.0.1:8080

  Unfortunatelly, the connection is established for 1 seconde maximum and it disconnects right after.. I tried everything to keep it even setting a timeout to the request of ffmpeg.

  Thank you for those who are going to help me with this issue !

  UPDATE : Outputs gathered on the terminal

  1st is the output generated by ffmpeg :

  MacBook-Pro-de-Frederic: ffmpeg -f mp4 -i in.mp4 -f mpeg1video -r 30 http://127.0.0.1:8080
  
  ffmpeg version 3.2.2 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
    configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
  
    libavutil      55. 34.100 / 55. 34.100
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.100 / 57. 56.100
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.25.101
  
    Duration: 00:00:13.29, start: 0.000000, bitrate: 490 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 300x198 [SAR 1:1 DAR 50:33], 489 kb/s, 22.73 fps, 22.73 tbr, 16k tbn, 45.45 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Output #0, mpeg1video, to 'http://127.0.0.1:8080':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.56.100
  
      Stream #0:0(und): Video: mpeg1video, yuv420p, 300x198 [SAR 1:1 DAR 50:33], q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.64.101 mpeg1video
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> mpeg1video (native))
  
  Press [q] to stop, [?] for help
  
  frame=  398 fps=0.0 q=7.2 Lsize=     540kB time=00:00:13.23 bitrate= 334.2kbits/s dup=96 drop=0 speed=49.7x    
  
  video:540kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%

  2nd output, the prints of the Node.js script :

  MacBook-Pro-de-Frederic: node stream-server.js 8080 8081
  
  Listening for MPEG Stream on http://127.0.0.1:8080/<width>/<height>
  
  Awaiting WebSocket connections on ws://127.0.0.1:8081/
  
  New WebSocket Connection (1 total)
  
  Stream Connected: ::ffff:127.0.0.1:52444 size: 320x240
  
  Stream disconnected
  
  </height></width>

  As you can see, my server receives the stream from ffmpeg but is disconnected right after.. Thus, I cannot do any stream and I don’t understand why because there is not any error that appears..

  UPDATE 2 : TESTED ON RASPBERRYPI MODEL B+

  I tested all the code hereabove on raspberry pi (after 5h installing ffmpeg..) and launch the encoding with the terminal command hereafter and it works perfectly ! I am still wondering why it is not working properly on Mac ? Maybe a problem of compatibility between OSX and FFMPEG ? If someone has an answer or an idea of the solution to the problem on Macintosh, let me know !

  raspivid -t 0 -w 320 -h 240 -fps 20 -vf -o - | ffmpeg -y -i pipe:0 -s 320x240 -f video4linux2 -f mpeg1video -b 400k -r 30 http://127.0.0.1:8080

  Configuration used : Macbook Pro updated running Node.js 6.9.2 & ffmpeg 3.2.2.

  Frederic

• 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