title: readeia608
media types:
Video
description: Read EIA-608 Closed Caption codes from input video and write them to frame metadata.
version: Lavfi7.16.100
creator: libavfilter maintainers
description:
set from which line to scan for codes
type: integer
readonly: no
required: no
minimum: 0
default: 0
description:
set to which line to scan for codes
type: integer
readonly: no
required: no
minimum: 0
default: 0
description:
set minimal acceptable amplitude change for sync codes detection
type: float
readonly: no
required: no
minimum: 0.001
maximum: 1
default: 0.2
description:
set ratio of width reserved for sync code detection
type: float
readonly: no
required: no
minimum: 0.1
maximum: 0.7
default: 0.27
description:
set max peaks height difference for sync code detection
type: float
readonly: no
required: no
minimum: 0
maximum: 0.5
default: 0.1
description:
set max peaks period difference for sync code detection
type: float
readonly: no
required: no
minimum: 0
maximum: 0.5
default: 0.1
description:
set first two max start code bits differences
type: float
readonly: no
required: no
minimum: 0
maximum: 0.5
default: 0.02
description:
set min ratio of bits height compared to 3rd start code bit
type: float
readonly: no
required: no
minimum: 0.01
maximum: 1
default: 0.75
description:
set white color threshold
type: float
readonly: no
required: no
minimum: 0.1
maximum: 1
default: 0.35
description:
set black color threshold
type: float
readonly: no
required: no
minimum: 0
maximum: 0.5
default: 0.15
description:
check and apply parity bit
type: string
readonly: no
required: no
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