holoer.blogg.se - Ffmpeg filter graph

For the sake of argument lets leave it at 3. So basically what I'm trying to do is as follows: Try as I might, I simply can't seem to wrap my head around the syntax for applying multiple video filters in sequence with ffmpeg. Release a new version, update the version number in version.rb, and then runīundle exec rake release, which will create a git tag for the version, push To install this gem onto your local machine, run bundle exec rake install. Prompt that will allow you to experiment. You can also run bin/console for an interactive to_s, ' -map ', SoundtrackVideo, ' -map ', SoundtrackAudio, ' -map ', " ", ) end private def create_filter_graph graph ( outputs: ' CommentaryTrack ', chains: ) end # You can easily encapsulate a group of filters with private methods, forĭef mono_mix ) ] end end DevelopmentĪfter checking out the repo, run bin/setup to install dependencies.

SoundtrackVideo = ' 1:v ' SoundtrackAudio = ' 1:a ' CommentaryAudio = ' 2:a ' def initialize ( media_container_path, commentary_audio_path, output_path ) = media_container_path = commentary_audio_path = output_path end def call filter_graph = create_filter_graph spawn ( ' ffmpeg ', ' -i ', , ' -i ', , ' -filter_complex ', filter_graph. Soundtrack = ' c ' DuckedSoundtrack = ' r ' # ffmpeg notation To make the commentary more audible, with "duck" the soundtrackĬlass AddCommentary include FFmpeg :: Filters :: Helper # Surround-sound prefixes # commentary track mixed into the rear speakers (for a nice Statler and Waldorf # new audio stream will contain a copy of the film's soundtrack, with the Usage # This class adds an additional audio stream to a given multimedia file. Or install it yourself as: $ gem install ffmpeg-filter_graph

Track inpads and outpats, to ensure that outpads are used, and inpads exist.Īdd this line to your application's Gemfile: gem ' ffmpeg-filter_graph '.

Single string you can pass as the argument to ffmpeg's -filter_complex In a sense, this gem is really a "string factory", as it's main output is a

The purpose of this gem is to help you create complex filter-graphs for FFmpeg.