Class: Wco::Newsvideo

Inherits:
Object
  • Object
show all
Includes:
Mongoid::Document, Mongoid::Timestamps, Utils
Defined in:
app/models/wco/newsvideo.rb

Constant Summary collapse

PAGE_PARAM_NAME = 
'newsvideos_page'

Instance Method Summary collapse

Methods included from Utils

#export, included

Instance Method Details

#do_split ⇒ Object 



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# File 'app/models/wco/newsvideo.rb', line 57

def do_split
  @newsvideo = self

  sentences = PragmaticSegmenter::Segmenter.new(text: @newsvideo.body).segment
  phrases = sentences_to_phrases(sentences)

  phrases.each_with_index do |phrase, idx|
    newspartial = Wco::Newspartial.new body: phrase, newsvideo: @newsvideo, slug: "#{sprintf("%02d", idx)}0"
    newspartial.save!
  end
end

#generate ⇒ Object 



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# File 'app/models/wco/newsvideo.rb', line 70

def generate
  @newsvideo = self
  workdir    = Rails.root.join('tmp', @newsvideo.id.to_s)
  partials   = @newsvideo.newspartials.order_by(slug: :asc).to_a

  ## put together config, first thing
  cmd = "cd #{Rails.root.join('tmp')} ; rm -rf #{@newsvideo.id} ; mkdir -p #{@newsvideo.id} ; cd #{@newsvideo.id} ; "
  partials.each_with_index do |_part, idx|
    cmd = "#{cmd} echo \"file 'synced_#{idx}.mp4'\" >> syncedlist.txt ; "
  end
  puts "+++ config cmd:"
  puts cmd
  out = `#{cmd}`
  puts! out, 'out'

  ## get base files locally
  cmd = "cd #{workdir} ; "
  partials.each_with_index do |part, idx|
    cmd = "#{cmd} wget -nc -O newspartial_#{idx}.webm #{part.video.video.url} ; "
    cmd = "#{cmd} [ -f newspartial_#{idx}.mp4 ] || ffmpeg -y -i newspartial_#{idx}.webm -r 24 -pix_fmt yuv420p newspartial_#{idx}.mp4 ; "
    cmd = "#{cmd} wget -nc -O newspartial_#{idx}.wav #{part.audio.url} ; "
  end
  puts "+++ base files cmd:"
  puts cmd
  out = `#{cmd}`
  puts! out, 'out'

  ## Sync each newspartial's sound to its video, then we'll merge those clips
  partials.each_with_index do |_part, idx|
    cmd = <<~AOL
      cd #{workdir} ;
      rm -f synced_#{idx}.mp4 ;
      ffmpeg -y -i newspartial_#{idx}.mp4 -i newspartial_#{idx}.wav \
        -map 0:v:0 \
        -map 1:a:0 \
        -c:v libx264 \
        -pix_fmt yuv420p \
        -c:a aac \
        -shortest \
        synced_#{idx}.mp4 ;
    AOL
    puts "+++ per-partial #{idx} sync cmd:"
    puts cmd
    out = `#{cmd}`
    puts! out, 'out'
  end

  ## merge synced newspartials into combined_base
  cmd = <<~AOL
    cd #{workdir} ;
    rm -f combined_base.mp4 ;
    ffmpeg -y -f concat -safe 0 -i syncedlist.txt -c:v libx264 -pix_fmt yuv420p \
      -c:a aac \
      -vsync cfr \
      -af "aresample=async=1:first_pts=0" \
      combined_base.mp4 ;
  AOL
  puts "+++ synced concat cmd:"
  puts cmd
  out = `#{cmd}`
  puts! out, 'out'




  ## overlays
  if @newsvideo.newsoverlays.length > 0
    ## get overlays
    cmd = "cd #{Rails.root.join('tmp', @newsvideo.id)} ; "
    @newsvideo.newsoverlays.each_with_index do |overlay, idx|
      cmd = "#{cmd} wget -nc -O overlay_#{idx}.mp4 #{overlay.video.video.url} ; "
    end
    puts "+++ overlays cmd:"
    puts cmd
    out = `#{cmd}`
    puts! out, 'out'

    ##  combine overlays
    nn = @newsvideo.newsoverlays.map { |ol| ol.start_at_ms }
    puts! nn, 'nn'
    ffmpeg_cmd = [ "ffmpeg -y -i combined_base.mp4 \\" ]
    nn.each_with_index do |ms, idx|
      ffmpeg_cmd.push " -i overlay_#{idx}.mp4 \\"
    end
    ffmpeg_cmd.push "-filter_complex \"\\"

    nn.each_with_index do |ms, idx|
      ffmpeg_cmd.push "[#{idx+1}:v]setpts=PTS-STARTPTS+#{ms.to_f/1000}/TB[v#{idx+1}]; \\"
    end

    curr_s = "0:v"
    n = nil
    nn.each_with_index do |ms, idx|
      n = idx+1
      ffmpeg_cmd.push "[#{curr_s}][v#{n}]overlay=0:0:eof_action=pass[tmp#{n}]#{idx+1<nn.length ? ';' : ''} \\"
      curr_s = "tmp#{n}"
    end
    ffmpeg_cmd.push " \" -map \"[#{curr_s}]\" -map 0:a? -c:v libx264 -c:a copy combined_fin.mp4 "
    ffmpeg_cmd = ffmpeg_cmd.join("\n")
    puts "+++ ffmpeg_cmd:"
    puts ffmpeg_cmd

    ## combine overlays 2
    cmd = <<~AOL
      cd #{Rails.root.join('tmp', @newsvideo.id)} ;
      rm -f combined_fin.mp4 ;
      #{ffmpeg_cmd} ;
    AOL
    puts "+++ ffmpeg cmd 2:"
    puts cmd
    out = `#{cmd}`
    puts! out, 'out'
  else
    cmd = `cd #{workdir} ; mv combined_base.mp4 combined_fin.mp4`
  end

  ## upload the video.
  @video = Wco::Video.new name: @newsvideo.title
  video_path = Rails.root.join("tmp", @newsvideo.id, "combined_fin.mp4")
  @video.video = File.open(video_path)
  flag = @video.save
  if !flag
    puts "Could not create video:"
    puts @video.errors.full_messages.join(", ")
  end

  @newsvideo.update( generated_video: @video )
end

#name ⇒ Object 



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# File 'app/models/wco/newsvideo.rb', line 14

def name ; title ; end

#newsoverlays ⇒ Object 



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# File 'app/models/wco/newsvideo.rb', line 53

def newsoverlays
  Wco::Newsoverlay.where( newsvideo_id: self.id )
end

#newspartials ⇒ Object 



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# File 'app/models/wco/newsvideo.rb', line 42

def newspartials
  Wco::Newspartial.where( newsvideo_id: self.id )
end

#sentences_to_phrases(sentences) ⇒ Object 



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# File 'app/models/wco/newsvideo.rb', line 199

def sentences_to_phrases sentences
  phrases = []
  current_phrase = []

  current_word_count = 0

  sentences.each do |sentence|
    words_in_sentence = sentence.split.size

    # If adding this sentence exceeds the limit, start a new phrase
    if current_word_count + words_in_sentence > Wco::Newspartial::MAX_WORDS
      phrases << current_phrase.join(" ")
      current_phrase = []
      current_word_count = 0
    end

    current_phrase << sentence
    current_word_count += words_in_sentence
  end

  # Add the last phrase if any
  phrases << current_phrase.join(" ") unless current_phrase.empty?
end

#to_s ⇒ Object 



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# File 'app/models/wco/newsvideo.rb', line 15

def to_s
  title
end