Producer: decklink

Plugin Information

title: Blackmagic Design DeckLink Capture
media types: Audio Video
description: Capture video and audio using Blackmagic Design DeckLink SDI or Intensity HDMI cards.
version: 1
creator: Dan Dennedy
copyright: Copyright (C) 2011-2018 Meltytech, LLC
license: LGPL

Notes

Please ensure that you use a MLT profile that is compatible with a broadcast standard which the card you are using supports. If you must use an interlaced profile but wish to deinterlace or scale the input, then you must use the consumer producer, e.g.: melt -profile square_pal consumer:decklink: profile=dv_pal

Bugs

  • It is incompatible with the yadif deinterlacer.
  • Transport controls such as seeking has no affect.
  • External deck control is not implemented.
  • Only 8-bit Y’CbCr is supported at this time.

Parameters

argument

title: Card
type: integer
readonly: no
required: no
minimum: 0
default: 0
widget: spinner

channels

title: Audio channels
type: integer
readonly: no
required: no
minimum: 2
maximum: 16
default: 2
widget: spinner

buffer

title: Maximum buffer
description: There is a queue of frames between this plugin and its consumer. If the consumer has a little, intermittent delay then it reduces the risk of dropping a frame. However, this provides a maximum number of frames that can be buffered to prevent consuming memory unbounded in the case of frequent or sustained delays.
type: integer
readonly: no
required: no
minimum: 0
default: 25
unit: frames
widget: spinner

prefill

title: Initial buffer
description: Initially fill the buffer with a number of frames.
type: integer
readonly: no
required: no
minimum: 0
default: 25
unit: frames
widget: spinner

vanc

title: Vertical ancillary capture
description: Captures vertical ancillary data as image data and places it at the top of the visible/active image. You can either set the number of lines to capture or use -1 for automatic (32 lines) mode.
type: integer
readonly: no
required: no
minimum: -1
default: 0
unit: lines
widget: spinner

preview

title: Enable preview
description: Support preview monitoring when paused (speed = 0).
type: integer
readonly: no
required: no
minimum: 0
maximum: 1
default: 0
widget: checkbox

devices

title: Number of devices
type: integer
readonly: true
required: no
minimum: 0

device.*

title: Device model
description: The model name of each device that accepts input.
type: string
readonly: true
required: no

priority

title: Thread priority
description: Set the DeckLink thread's scheduling class to realtime and its priority.
type: integer
readonly: no
required: no
minimum: 1
maximum: 99
default: 20

vitc_in

title: Start timecode
description: The vertical interval timecode (VITC) in binary-coded decimal (BCD) format. It skips frames that has VITC timecode less then specified. After reaching first frame with timecode greater or equal then specified this property is reset to zero.
type: integer
readonly: no
required: no

bitdepth

title: Bitdepth for capturing
description: Enable capturing in 10-bit native SDI signal
type: integer
readonly: no
required: no
values:

  • 8
  • 10

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