/usr/share/mlt/decklink/consumer_decklink.yml is in libmlt-data 6.0.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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type: consumer
identifier: decklink
title: Blackmagic Design DeckLink Output
version: 2
copyright: Copyright (C) 2011 Daniel R. Dennedy
license: LGPL
language: en
creator: Dan Dennedy
tags:
- Audio
- Video
description: >
Output audio and video using Blackmagic Design DeckLink SDI or Intensity
HDMI cards.
notes: >
Please ensure that you use a MLT profile that is compatible with a broadcast
standard which the card you are using supports.
bugs:
- Only internal keying is supported at this time.
- Only 8-bit Y'CbCr or RGBA (key) is supported at this time.
parameters:
- identifier: argument
title: Card
type: integer
readonly: no
required: no
mutable: no
default: 0
minimum: 0
widget: spinner
- identifier: preroll
title: Pre-roll Count
type: integer
description: >
This controls the amount of buffering in the DeckLink driver/library.
Increase this if you get video tearing or choppy audio. However, as
you increase the amount, you increase the risk of audio and video
becoming out of synchronization.
readonly: no
required: no
mutable: no
default: 3
minimum: 2
unit: frames
widget: spinner
- identifier: keyer
title: Enable Keyer
type: integer
description: >
Keying is the process of compositing MLT output over a live SDI input.
The alpha channel of the MLT video controls the transparent areas, and
the keyer supports alpha-blending. You can not control the compositing
rectangle. Rather, the entire MLT output overlays the entire video
input. Therefore, you must use MLT's compositing services to control
the size and position. The value 1 enables the internal keyer, the
value 2 enables the external keyer, and the value 0 disables it.
readonly: no
required: no
mutable: no
default: 0
minimum: 0
maximum: 2
- identifier: keyer_level
title: Key Opacity
type: float
description: >
This controls the level of blending between the key and the input video.
1 is fully opaque and something near 0 is transparent. However, absolute
0 is considered as "not supplied" and also fully opaque. 0.5 is an
evenly balanced blending of the key and input video.
readonly: no
required: no
mutable: no
minimum: 0
maximum: 1
default: 1
widget: slider
- identifier: devices
title: Number of devices
type: integer
readonly: yes
minimum: 0
- identifier: device.*
title: Device model
description: The model name of each device that provides output.
type: string
readonly: yes
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