Skip to main content
Version: 2.2.5

Source / Conversion

ffmpeg.decode.audio​

Decode a source's audio content

Type:

(?id : string?, source(audio=ffmpeg.copy('a), 'b)) -> source(audio=pcm('c))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.decode.audio")
  • (unlabeled) (of type source(audio=ffmpeg.copy('a), 'b))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.decode.audio_video​

Decode a source's audio and video content

Type:

(?id : string?, source(audio=ffmpeg.copy('b), video=ffmpeg.copy('a))) ->
source(audio=pcm('c), video=canvas('d))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.decode.audio_video")
  • (unlabeled) (of type source(audio=ffmpeg.copy('b), video=ffmpeg.copy('a)))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.decode.video​

Decode a source's video content

Type:

(?id : string?, source(video=ffmpeg.copy('a), 'b)) ->
source(video=canvas('c))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.decode.video")
  • (unlabeled) (of type source(video=ffmpeg.copy('a), 'b))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.encode.audio​

Encode a source's audio content

Type:

(?id : string?, format(audio=pcm('a), 'b), source(audio=pcm('a), 'c)) ->
source(audio=ffmpeg.copy('d))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.encode.audio")
  • (unlabeled) (of type format(audio=pcm('a), 'b))
  • (unlabeled) (of type source(audio=pcm('a), 'c))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.encode.audio_video​

Encode a source's audio and video content

Type:

(?id : string?, format(audio=pcm('a), video=canvas('b), 'c),
 source(audio=pcm('a), video=canvas('b))) -> source(audio=ffmpeg.copy('d),
video=ffmpeg.copy('e))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.encode.audio_video")
  • (unlabeled) (of type format(audio=pcm('a), video=canvas('b), 'c))
  • (unlabeled) (of type source(audio=pcm('a), video=canvas('b)))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.encode.video​

Encode a source's video content

Type:

(?id : string?, format(video=canvas('a), 'b), source(video=canvas('a), 'c)) ->
source(video=ffmpeg.copy('d))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.encode.video")
  • (unlabeled) (of type format(video=canvas('a), 'b))
  • (unlabeled) (of type source(video=canvas('a), 'c))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.raw.decode.audio​

Decode a source's audio content

Type:

(?id : string?, source(audio=ffmpeg.audio.raw('a), 'b)) ->
source(audio=pcm('c))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.raw.decode.audio")
  • (unlabeled) (of type source(audio=ffmpeg.audio.raw('a), 'b))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.raw.decode.audio_video​

Decode a source's audio and video content

Type:

(?id : string?, source(audio=ffmpeg.audio.raw('b),
 video=ffmpeg.video.raw('a))) -> source(audio=pcm('c), video=canvas('d))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.raw.decode.audio_video")
  • (unlabeled) (of type source(audio=ffmpeg.audio.raw('b), video=ffmpeg.video.raw('a)))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.raw.decode.video​

Decode a source's video content

Type:

(?id : string?, source(video=ffmpeg.video.raw('a), 'b)) ->
source(video=canvas('c))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.raw.decode.video")
  • (unlabeled) (of type source(video=ffmpeg.video.raw('a), 'b))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.raw.encode.audio​

Encode a source's audio content

Type:

(?id : string?, format(audio=ffmpeg.audio.raw('a), 'b), source(audio=pcm('c),
 'd)) -> source(audio=ffmpeg.audio.raw('a))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.raw.encode.audio")
  • (unlabeled) (of type format(audio=ffmpeg.audio.raw('a), 'b))
  • (unlabeled) (of type source(audio=pcm('c), 'd))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.raw.encode.audio_video​

Encode a source's audio and video content

Type:

(?id : string?, format(audio=ffmpeg.audio.raw('a),
 video=ffmpeg.video.raw('b), 'c), source(audio=pcm('e), video=canvas('d))) ->
source(audio=ffmpeg.audio.raw('a), video=ffmpeg.video.raw('b))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.raw.encode.audio_video")
  • (unlabeled) (of type format(audio=ffmpeg.audio.raw('a), video=ffmpeg.video.raw('b), 'c))
  • (unlabeled) (of type source(audio=pcm('e), video=canvas('d)))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

ffmpeg.raw.encode.video​

Encode a source's video content

Type:

(?id : string?, format(video=ffmpeg.video.raw('a), 'b),
 source(video=canvas('c), 'd)) -> source(video=ffmpeg.video.raw('a))

Arguments:

  • id (of type string?, which defaults to "ffmpeg.raw.encode.video")
  • (unlabeled) (of type format(video=ffmpeg.video.raw('a), 'b))
  • (unlabeled) (of type source(video=canvas('c), 'd))

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

mean​

Produce mono audio by taking the mean of all audio channels.

Type:

(?id : string?, ?normalize : bool, source(audio=pcm('a), 'b)) ->
source(audio=pcm(mono), 'b)
where 'b is a set of tracks to be muxed into a source

Arguments:

  • id (of type string?, which defaults to "mean"): Force the value of the track ID.
  • normalize (of type bool, which defaults to true): Divide the output volume by the number of channels.
  • (unlabeled) (of type source(audio=pcm('a), 'b) where 'b is a set of tracks to be muxed into a source)

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

stereo​

Convert any pcm audio source into a stereo source.

Type:

(?id : string?, source(audio=pcm('a), 'b)) -> source(audio=pcm(stereo), 'b)
where 'b is a set of tracks to be muxed into a source

Arguments:

  • id (of type string?, which defaults to "stereo")
  • (unlabeled) (of type source(audio=pcm('a), 'b) where 'b is a set of tracks to be muxed into a source)

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

stereo.left​

Extract the left channel of a stereo source

Type:

(?id : string?, source(audio=pcm(stereo), 'a)) -> source(audio=pcm(mono), 'a)
where 'a is a set of tracks to be muxed into a source

Arguments:

  • id (of type string?, which defaults to "stereo.left")
  • (unlabeled) (of type source(audio=pcm(stereo), 'a) where 'a is a set of tracks to be muxed into a source): Source to extract from

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

stereo.right​

Extract the right channel of a stereo source

Type:

(?id : string?, source(audio=pcm(stereo), 'a)) -> source(audio=pcm(mono), 'a)
where 'a is a set of tracks to be muxed into a source

Arguments:

  • id (of type string?, which defaults to "stereo.right")
  • (unlabeled) (of type source(audio=pcm(stereo), 'a) where 'a is a set of tracks to be muxed into a source): Source to extract from

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

swap​

Swap two channels of a stereo source.

Type:

(?string?, source(audio=pcm(stereo), 'a)) -> source(audio=pcm(stereo), 'a)
where 'a is a set of tracks to be muxed into a source

Arguments:

  • (unlabeled) (of type string?, which defaults to "swap")
  • (unlabeled) (of type source(audio=pcm(stereo), 'a) where 'a is a set of tracks to be muxed into a source)

Methods:

  • buffered (of type () -> [string * float]): Length of buffered data.
  • duration (of type () -> float): Estimation of the duration of the current track.
  • elapsed (of type () -> float): Elapsed time in the current track.
  • fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
  • id (of type () -> string): Identifier of the source.
  • is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
  • is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
  • is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
  • last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
  • log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source's log level, from 1 to 5.
  • on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
  • on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
  • on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
  • on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source's final ID is set.
  • remaining (of type () -> float): Estimation of remaining time in the current track.
  • seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
  • self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
  • skip (of type () -> unit): Skip to the next track.
  • time (of type () -> float): Get a source's time, based on its assigned clock.

track.audio.stereo.left​

Extract the left channel of a stereo track

Type:

(?id : string?, pcm(stereo)) -> pcm(mono)

Arguments:

  • id (of type string?, which defaults to "track.audio.stereo.left")
  • (unlabeled) (of type pcm(stereo)): Track to extract from

track.audio.stereo.right​

Extract the right channel of a stereo track

Type:

(?id : string?, pcm(stereo)) -> pcm(mono)

Arguments:

  • id (of type string?, which defaults to "track.audio.stereo.right")
  • (unlabeled) (of type pcm(stereo)): Track to extract from