Module AvfilterSource

This module provides an API to AVfilter.

Sourcetype config
Sourcetype valued_arg = [
  1. | `String of string
  2. | `Int of int
  3. | `Int64 of int64
  4. | `Float of float
  5. | `Rational of Avutil.rational
]
Sourcetype args = [
  1. | `Flag of string
  2. | `Pair of string * valued_arg
]
Sourcetype ('a, 'b) av = {
  1. audio : 'a;
  2. video : 'b;
}
Sourcetype ('a, 'b) io = {
  1. inputs : 'a;
  2. outputs : 'b;
}
Sourcetype ('a, 'b, 'c) pad

(attached/unattached, audio/video, input/output) pad

Sourcetype ('a, 'b) pads = (('a, [ `Audio ], 'b) pad list, ('a, [ `Video ], 'b) pad list) av
Sourcetype flag = [
  1. | `Dynamic_inputs
  2. | `Dynamic_outputs
  3. | `Slice_threads
  4. | `Support_timeline_generic
  5. | `Support_timeline_internal
]
Sourcetype 'a filter = {
  1. name : string;
  2. description : string;
  3. options : Avutil.Options.t;
  4. flags : flag list;
  5. io : (('a, [ `Input ]) pads, ('a, [ `Output ]) pads) io;
}
Sourcetype 'a input = 'a Avutil.frame -> unit
Sourcetype 'a context
Sourcetype 'a output = {
  1. context : 'a context;
  2. handler : unit -> 'a Avutil.frame;
}
Sourcetype 'a entries = (string * 'a) list
Sourcetype inputs = ([ `Audio ] input entries, [ `Video ] input entries) av
Sourcetype outputs = ([ `Audio ] output entries, [ `Video ] output entries) av
Sourcetype t = (inputs, outputs) io
Sourceval time_base : _ context -> Avutil.rational
Sourceval frame_rate : [ `Video ] context -> Avutil.rational
Sourceval width : [ `Video ] context -> int
Sourceval height : [ `Video ] context -> int
Sourceval sample_aspect_ratio : [ `Video ] context -> Avutil.rational
Sourceval pixel_format : [ `Video ] context -> Avutil.Pixel_format.t
Sourceval channels : [ `Audio ] context -> int
Sourceval channel_layout : [ `Audio ] context -> Avutil.Channel_layout.t
Sourceval sample_rate : [ `Audio ] context -> int
Sourceval sample_format : [ `Audio ] context -> Avutil.Sample_format.t
Sourceval set_frame_size : [ `Audio ] context -> int -> unit
Sourceexception Exists
Sourceval filters : [ `Unattached ] filter list

Filter list.

Sourceval find : string -> [ `Unattached ] filter
Sourceval find_opt : string -> [ `Unattached ] filter option
Sourceval abuffer : [ `Unattached ] filter

Buffers (input).

Sourceval buffer : [ `Unattached ] filter
Sourceval abuffersink : [ `Unattached ] filter

Sinks (output).

Sourceval buffersink : [ `Unattached ] filter
Sourceval pad_name : (_, _, _) pad -> string

Pad name.

Sourceval init : unit -> config

Initiate a filter graph configuration.

Sourceval attach : ?args:args list -> name:string -> [ `Unattached ] filter -> config -> [ `Attached ] filter

Attach a filter to a filter graph configuration. Raises Exists if there is already a filter by that name in the graph. Number of inputs or outputs can change from the filter's specifications, in particular if the filter has the `Dynamic_input or `Dynamic_output flag set.

Link two filter pads.

Sourcetype ('a, 'b, 'c) parse_node = {
  1. node_name : string;
  2. node_args : args list option;
  3. node_pad : ('a, 'b, 'c) pad;
}

Parse a graph described by a string and attach outputs/inputs to it.

Sourcetype ('a, 'b) parse_av = (('a, [ `Audio ], 'b) parse_node list, ('a, [ `Video ], 'b) parse_node list) av
Sourcetype 'a parse_io = (('a, [ `Input ]) parse_av, ('a, [ `Output ]) parse_av) io
Sourceval parse : [ `Unattached ] parse_io -> string -> config -> [ `Attached ] parse_io
Sourceval launch : config -> t

Check validity and configure all the links and formats in the graph and return its outputs and outputs.

Sourcemodule Utils : sig ... end