ref: master
plugins/html5_video/lib/html5_video_plugin/ffmpeg.rb
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# Works for ffmpeg version 2.8.6-1~bpo8 shiped by Debian Jessie Backports # https://packages.debian.org/jessie-backports/ffmpeg # Add this line to your /etc/apt/sources.list: # deb http://http.debian.net/debian jessie-backports main # then: aptitude install ffmpeg class Html5VideoPlugin::Ffmpeg def run(*parameters) parameters = parameters.flatten cmd = ['ffmpeg'] + parameters.map do |p| p.kind_of?(Symbol) ? '-'+p.to_s : p.to_s end io = IO.popen({'LANG'=>'C.UTF-8'}, cmd, err: [:child, :out]) output = io.read io.close response = { error: { :code => 0, :message => '' }, parameters: parameters, output: output } if $?.exitstatus != 0 then if $?.exitstatus == 127 then throw 'There is no FFmpeg installed!' end response[:error][:code] = -1 response[:error][:message] = _('Unknow error') if match = /\n\s*([^\n]*): No such file or directory\s*\n/i.match(output) response[:error][:code] = 1 response[:error][:message] = _('No such file or directory "%s".') % match[1] elsif output =~ /At least one output file must be specified/i response[:error][:code] = 2 response[:error][:message] = _('No output defined.') elsif match = /\n\s*Unknown encoder[\s']+([^\s']+)/i.match(output) response[:error][:code] = 3 response[:error][:message] = _('Unknown encoder "%s".') % match[1] elsif output =~ /\n\s*Error while opening encoder for output/i response[:error][:code] = 4 response[:error][:message] = _('Error while opening encoder for output - maybe incorrect parameters such as bit rate, frame rate, width or height.') elsif match = /\n\s*Could not open '([^\s']+)/i.match(output) response[:error][:code] = 5 response[:error][:message] = _('Could not open "%s".') % match[1] elsif match = /\n\s*Unsupported codec (.*) for (.*) stream (.*)/i.match(output) response[:error][:code] = 6 response[:error][:message] = _('Unsupported codec %{codec} for %{act} stream %{id}.') % { :codec=>match[1], :act=>match[2], :id=>match[3] } elsif output =~ /Unable to find a suitable output format/i response[:error][:code] = 7 response[:error][:message] = _('Unable to find a suitable output format for %{file}.') % { :file=>parameters[-1] } elsif output =~ /Invalid data found when processing input/i response[:error][:code] = 8 response[:error][:message] = _('Invalid data found when processing input.') end end return response end def register_information response = self.run(:formats)[:output] @@version = /^\s*FFmpeg version ([0-9.]+)/i.match(response)[1] @@formats = {} response.split('--')[-1].strip.split("\n").each do |line| if pieces = / (.)(.) ([^\s]+)\s+([^\s].*)/.match(line) @@formats[pieces[3].to_sym] = { demux: ( pieces[1] == 'D' ), mux: ( pieces[2] == 'E' ), description: pieces[4].strip } end end response = self.run(:codecs)[:output] @@codecs = {} response.split('--')[-1].strip.split("\n").each do |line| if pieces = / (.)(.)(.)(.)(.)(.) ([^\s]+)\s+([^\s].*)/.match(line) @@codecs[pieces[7].to_sym] = { decode: ( pieces[1] == 'D' ), encode: ( pieces[2] == 'E' ), draw_horiz_band: ( pieces[4] == 'S' ), direct_rendering: ( pieces[5] == 'D' ), wf_trunc: ( pieces[6] == 'T' ), type: ( if pieces[3] == 'V'; :video elsif pieces[3] == 'A'; :audio elsif pieces[3] == 'S'; :subtitle else :unknown; end ), description: pieces[8].strip } end end { version: @@version, formats: @@formats, codecs: @@codecs } end def timestr_to_secs str return nil if ! /^[0-9]{2}:[0-9]{2}:[0-9]{2}$/.match str t = str.split(':').map(&:to_i) t[0]*60*60 + t[1]*60 + t[2] end def get_stream_info(stream_str) stream_info = { :type => 'undefined' } stream_info[:type] = 'video' if / Video:/.match(stream_str) stream_info[:type] = 'audio' if / Audio:/.match(stream_str) { id: [ /^\s*Stream ([^:(]+)/ ], codec: [ / (?:Audio|Video):\s*([^,\s]+)/x ], bitrate: [ / ([0-9]+) kb\/s\b/ , :to_i ], frequency: [ / ([0-9]+) Hz\b/ , :to_i ], channels: [ / ([0-9]+) channels\b/ , :to_i ], framerate: [ / ([0-9.]+) (fps|tbr)\b/ , :to_f ], size: [ / ([0-9]+x[0-9]+)[, ]/ ], }.each do |att, params| re = params[0] method = params[1] || :strip if match = re.match(stream_str) then stream_info[att] = match[1].send(method) end end if stream_info[:size] size_array = stream_info[:size].split('x').map{|s| s.to_i} stream_info[:size] = { :w=>size_array[0], :h=>size_array[1] } end stream_info end def webdir_for_original_video(video) webdir = File.dirname(video) +'/web' Dir.mkdir(webdir) if ! File.exist?(webdir) webdir end def valid_abrate_for_web(info) if brate = info.audio_stream[0][:bitrate] brate = 8 if brate < 8 (brate>128)? 128 : brate else 48 end end def valid_vbrate_for_web(info) if brate = info.video_stream[0][:bitrate] || info[:global_bitrate] brate = 128 if brate < 128 (brate>1024)? 1024 : brate else 400 end end def valid_size_for_web(info) orig_size = info.video_stream[0][:size] if info.video_stream[0][:size][:w] > 640 h = 640.0 / (orig_size[:w].to_f/orig_size[:h].to_f) { :w=>640, :h=>h.to_i } else { :w=>orig_size[:w].to_i, :h=>orig_size[:h].to_i } end end def validate_conversion_conf_for_web(conf, file_type) conf = conf.clone if conf[:abrate].nil? || conf[:vbrate].nil? || conf[:size].nil? info = get_video_info(conf[:in]) if info[:error][:code] == 0 conf[:abrate] ||= valid_abrate_for_web info conf[:vbrate] ||= valid_vbrate_for_web info conf[:size] ||= valid_size_for_web info end end result_dir = webdir_for_original_video conf[:in] size_str = "#{conf[:size][:w]}x#{conf[:size][:h]}" unless conf[:file_name] conf[:file_name] = "#{size_str}_#{conf[:vbrate]}.#{file_type}" end conf[:out] = result_dir+'/'+conf[:file_name] conf end public def get_video_info(file) response = self.run :i, file if response[:error][:code] == 2 # No output is not an error on this context response[:error][:code] = 0 response[:error][:message] = _('Success.') end response[:metadata] = {} { author: /\n\s*author[\t ]*:([^\n]*)\n/i, title: /\n\s*title[\t ]*:([^\n]*)\n/i, comment: /\n\s*comment[\t ]*:([^\n]*)\n/i }.each do |att, re| if match = re.match(response[:output]) then response[:metadata][att] = match[1].strip end end { type: /\nInput #0, ([a-z0-9]+), from/, duration: /\n\s*Duration:[\t ]*([0-9:]+)[^\n]* bitrate:/, global_bitrate: /\n\s*Duration:[^\n]* bitrate:[\t ]*([0-9]+)/ }.each do |att, re| if match = re.match(response[:output]) then response[att] = match[1].strip end end response[:duration] = timestr_to_secs response[:duration] response[:global_bitrate] = response[:global_bitrate].to_i response[:streams] = [] response[:output].split("\n").grep(/^\s*Stream /).each do |stream| response[:streams] << get_stream_info(stream) end def response.video_stream self[:streams].select {|s| s[:type] == 'video' } end def response.audio_stream self[:streams].select {|s| s[:type] == 'audio' } end return response end def convert2ogv(conf) conf[:type] = :OGV conf[:vbrate] ||= 600 parameters = [ :i, conf[:in], :y, :'b:v', "#{conf[:vbrate]}k", :f, 'ogg', :acodec, 'libvorbis', :vcodec, 'libtheora' ] parameters << :s << "#{conf[:size][:w]}x#{conf[:size][:h]}" if conf[:size] parameters << :'b:a' << "#{conf[:abrate]}k" if conf[:abrate] # Vorbis dá pau com -ar 8000Hz ??? parameters << :r << conf[:fps] if conf[:fps] parameters << conf[:out] response = self.run parameters response[:conf] = conf response end def convert2mp4(conf) conf[:type] = :MP4 conf[:vbrate] ||= 600 parameters = [ :i, conf[:in], :y, :'b:v', "#{conf[:vbrate]}k", :preset, 'slow', :f, 'mp4', :acodec, 'aac', :vcodec, 'libx264', :strict, '-2' ] parameters << :s << "#{conf[:size][:w]}x#{conf[:size][:h]}" if conf[:size] parameters << :'b:a' << "#{conf[:abrate]}k" if conf[:abrate] parameters << :r << conf[:fps] if conf[:fps] parameters << conf[:out] response = self.run parameters response[:conf] = conf response end def convert2webm(conf) conf[:type] = :WEBM conf[:vbrate] ||= 600 parameters = [ :i, conf[:in], :y, :'b:v', "#{conf[:vbrate]}k", :f, 'webm', :acodec, 'libvorbis', :vcodec, 'libvpx' ] parameters << :s << "#{conf[:size][:w]}x#{conf[:size][:h]}" if conf[:size] parameters << :'b:a' << "#{conf[:abrate]}k" if conf[:abrate] parameters << :r << conf[:fps] if conf[:fps] parameters << conf[:out] response = self.run parameters response[:conf] = conf response end def make_ogv_for_web(conf) conf = validate_conversion_conf_for_web conf, :ogv convert2ogv(conf) end def make_mp4_for_web(conf) conf = validate_conversion_conf_for_web conf, :mp4 convert2mp4(conf) end def make_webm_for_web(conf) conf = validate_conversion_conf_for_web conf, :webm convert2webm(conf) end # video_thumbnail creates 2 preview images on the sub directory web # from the video file parent dir. This preview images are six concatenated # frames in one image each. The frames have fixed dimension. The bigger # preview has frames with in 160x120, and smaller has frames whit in 107x80. # Use this helper only on the original movie to have only one "web" sub-dir. def video_thumbnail(video) result_dir = webdir_for_original_video video info = get_video_info(video) if info[:duration] < 15 pos = 1 duration = info[:duration] - 2 frate = ( 7.0 / duration ).ceil else pos = ( info[:duration] / 2.5 ).ceil duration = 7 frate = 1 end response = self.run :i, video, :ss, pos, :t, duration, :r, frate, :s, '320x240', result_dir+'/f%d.png' img_names = [ '/preview_160x120.jpg', '/preview_107x80.jpg' ] if response[:error][:code] == 0 imgs = (2..7).map { |num| img = result_dir+"/f#{num}.png" File.exists?(img) ? img : nil }.compact if imgs.size != 6 Rails.logger.error "Problem to create thumbs for video #{video} ???" end imgs = Magick::ImageList.new *imgs imgs.montage{ self.geometry='160x120+0+0' self.tile="1x#{imgs.size}" self.frame = "0x0+0+0" }.write result_dir+img_names[0] imgs.montage{ self.geometry='107x80+0+0' self.tile="1x#{imgs.size}" self.frame = "0x0+0+0" }.write result_dir+img_names[1] end f_num = 1 while File.exists? result_dir+"/f#{f_num}.png" do File.delete result_dir+"/f#{f_num}.png" f_num += 1 end if response[:error][:code] == 0 return { big: '/web'+img_names[0], thumb: '/web'+img_names[1] } else return response end end def version @@version ||= register_information[:version] end def formats @@formats ||= register_information[:formats] end def codecs @@codecs ||= register_information[:codecs] end end |