= RTranscoder

• http://rtranscoder.rubyforge.org/
• Postmodern (postmodern.mod3 at gmail.com)

== DESCRIPTION:

A Rubyful interface to various transcoding utilities using the RProgram library.

No more must one have to provide a shell command in order to run ffmpeg or mencoder for one's transcoding needs. RTranscoder and RProgram have mapped all the command-line options of various transcoding utilities to Ruby classes and methods for your convenience.

== FEATURES/PROBLEMS:

• Supports FFmpeg.
• Supports MPlayer.
• Supports MEncoder.

== REQUIREMENTS:

• RProgram >= 0.1.3

== INSTALL:

$ sudo gem install rtranscoder

== EXAMPLES:

• Encode a video to FLV.

  require 'rtranscoder/ffmpeg'

  include RTranscoder

  FFmpeg.encode do |ffmpeg| ffmpeg.input = 'video.avi' ffmpeg.audio_sampling_rate = 22.050.kHz ffmpeg.audio_bitrate = 32 # kbit/s ffmpeg.video_frame_size = '320x240' ffmpeg.output_format = :flv ffmpeg.output = 'video.flv' end

  Equivalent to:

  $ ffmpeg -i video.avi -ar 22050 -ab 32 -f flv -s 320x240 video.flv

• Encode an input AVI file using the x264 codec.

  require 'rtranscoder/mencoder'

  include RTranscoder

  MEncoder.encode do |mencoder| mencoder.input = 'input.avi' mencoder.quiet = true

  x264 settings

  mencoder.output_video_codec = :x264 mencoder.x264enc.bitrate = 3000 mencoder.x264enc.nr = 2000

  faac settings

  mencoder.output_audio_codec = :faac mencoder.faac.br = 32 mencoder.faac.tns = true

  mencoder.output = 'output.mp4' end

  Equivalent to:

  $ mencoder input.avi -o output.mp4 -queit -ovc x264 -x264encopts bitrate=3000:nr=2000 -oac faac -faacopts br=32:tns

• Extract frames starting at 00:00:03 for 00:00:01.

  require 'rtranscoder/ffmpeg'

  include RTranscoder

  FFmpeg.encode do |ffmpeg| ffmpeg.input = 'video.flv' ffmpeg.disable_audio = true ffmpeg.record_start_time = '00:00:03' ffmpeg.record_for = '00:00:01' ffmpeg.fps = 1 ffmpeg.overwrite_output_files = true ffmpeg.video_frame_size = '320x240' ffmpeg.output = 'videothumbnail%d.jpg' end

  Or even simplier...

  require 'rtranscoder/ffmpeg'

  RTranscoder.thumbnail(:video => 'video.flv', :start => '00:00:03', :length => '00:00:01', :width => 320, :height => 240, :image => 'videothumbnail%d.jpg')

  Both are equivalent to:

  $ ffmpeg -i video.flv -an -ss 00:00:03 -t 00:00:01 -r 1 -y -s 320x240 videothumbnail%d.jpg

== LICENSE:

The MIT License

Copyright (c) 2008 Hal Brodigan

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.