provides a more straight forward API to filters.

The API is intended for advanced use if you want to use filter commands. Then, we apply the expected input to the filter and return the pair (s, set_volume) of source and function. The filter instance has a process_command, which we use to create the set_volume function. Here’s an example:ĭef dynamic_volume(s) = def mkfilter(graph) = filter = (graph) def set_volume(v) = ignore( filter.process_command( 'volume', '#')) end s = (graph, s) t_input(s) s = filter.output s = (graph, s) (s, set_volume) end (mkfilter) end let (s, set_volume) = dynamic_volume(s)įirst, we instantiate a volume filter via. Conversely, sources can be created from them using and .įilters are configured within the closure of a function. * (unlabeled) : (default: None)įilters input and output are abstract values of type and. For instance: Ffmpeg filter: Add echoing to the audio. If enabled, the filters should appear as operators, prefixed with ffmpeg.filter. They are enabled in liquidsoap when compiled with the optional ffmpeg-avfilter. FFmpeg filters provide audio and video filters that can be used to transform content using the ffmpeg library.

Ffmpeg filter streams at input