rspngenc

PNG encoder

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstVideoEncoder
                    ╰──rspngenc

Implemented interfaces

Factory details

Authors: – Natanael Mojica

Classification: – Encoder/Video

Rank – primary

Plugin – rspng

Package – gst-plugin-png

Pad Templates

sink

video/x-raw:
         format: { GRAY8, GRAY16_BE, RGB, RGBA }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

src

image/png:

Presence – always

Direction – src

Object type – GstPad

Properties

compression-level 

“compression-level” GstRsPngCompressionLevel *

Selects the compression algorithm to use

Flags : Read / Write

Default value : default (0)

filter 

“filter” GstRsPngFilterType *

Selects the filter type to applied

Flags : Read / Write

Default value : nofilter (0)

Named constants

GstRsPngCompressionLevel

Members

default (0) – Default: Use the default compression level.
fast (1) – Fast: A fast compression algorithm.
best (2) – Best: Uses the algorithm with the best results.
huffman (3) – Huffman: Huffman compression.
rle (4) – Rle: Rle compression.

GstRsPngFilterType

Members

nofilter (0) – NoFilter: No filtering applied to the output.
sub (1) – Sub: filter applied to each pixel.
up (2) – Up: Up filter similar to Sub.
avg (3) – Avg: The Average filter uses the average of the two neighboring pixels.
paeth (4) – Paeth: The Paeth filter computes a simple linear function of the three neighboring pixels.

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