av1enc

AV1 Encoder.

Example launch line

 gst-launch-1.0 videotestsrc num-buffers=50 ! av1enc ! webmmux ! filesink location=av1.webm

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstVideoEncoder
                    ╰──av1enc

Implemented interfaces

Factory details

Authors: – Sean DuBois

Classification: – Codec/Encoder/Video

Rank – primary

Plugin – aom

Package – GStreamer Bad Plug-ins

Pad Templates

sink

video/x-raw:
         format: { I420, Y42B, Y444, YV12 }
      framerate: [ 0/1, 2147483647/1 ]
          width: [ 4, 2147483647 ]
         height: [ 4, 2147483647 ]

Presence – always

Direction – sink

Object type – GstPad

src

video/x-av1:

Presence – always

Direction – src

Object type – GstPad

Properties

buf-initial-sz 

“buf-initial-sz” guint

Decoder buffer initial size, expressed in units of time (milliseconds)

Flags : Read / Write

Default value : 4000

buf-optimal-sz 

“buf-optimal-sz” guint

Decoder buffer optimal size, expressed in units of time (milliseconds)

Flags : Read / Write

Default value : 5000

buf-sz 

“buf-sz” guint

Decoder buffer size, expressed in units of time (milliseconds)

Flags : Read / Write

Default value : 6000

cpu-used 

“cpu-used” gint

CPU Used. A Value greater than 0 will increase encoder speed at the expense of quality.

Flags : Read / Write

Default value : 0

drop-frame 

“drop-frame” guint

Temporal resampling configuration, drop frames as a strategy to meet its target data rate Set to zero (0) to disable this feature.

Flags : Read / Write

Default value : 0

end-usage 

“end-usage” Av1enc-end-usage-mode *

Rate control algorithm to use, indicates the end usage of this stream

Flags : Read / Write

Default value : vbr (0)

max-quantizer 

“max-quantizer” guint

Maximum (worst quality) quantizer

Flags : Read / Write

Default value : 0

min-quantizer 

“min-quantizer” guint

Minimum (best quality) quantizer

Flags : Read / Write

Default value : 0

overshoot-pct 

“overshoot-pct” guint

Rate control adaptation overshoot control

Flags : Read / Write

Default value : 25

resize-denominator 

“resize-denominator” guint

Frame resize denominator, assuming 8 as the numerator

Flags : Read / Write

Default value : 8

resize-kf-denominator 

“resize-kf-denominator” guint

Frame resize keyframe denominator, assuming 8 as the numerator

Flags : Read / Write

Default value : 8

resize-mode 

“resize-mode” Av1enc-resize-mode *

Frame resize mode

Flags : Read / Write

Default value : none (0)

row-mt 

“row-mt” gboolean

Enable row based multi-threading

Flags : Read / Write

Default value : true

superres-denominator 

“superres-denominator” guint

Frame super-resolution denominator, used only by SUPERRES_FIXED mode

Flags : Read / Write

Default value : 8

superres-kf-denominator 

“superres-kf-denominator” guint

Keyframe super-resolution denominator

Flags : Read / Write

Default value : 8

superres-kf-qthresh 

“superres-kf-qthresh” guint

Keyframe super-resolution qindex threshold, used only by SUPERRES_QTHRESH mode

Flags : Read / Write

Default value : 63

superres-mode 

“superres-mode” Av1enc-superres-mode *

It integrates upscaling after the encode/decode process

Flags : Read / Write

Default value : none (0)

superres-qthresh 

“superres-qthresh” guint

Frame super-resolution qindex threshold, used only by SUPERRES_QTHRESH mode

Flags : Read / Write

Default value : 63

target-bitrate 

“target-bitrate” guint

Target bitrate, in kilobits per second

Flags : Read / Write

Default value : 256

threads 

“threads” guint

Max number of threads to use encoding, set to 0 determine the approximate number of threads that the system schedule

Flags : Read / Write

Default value : 0

tile-columns 

“tile-columns” guint

Partition into separate vertical tile columns from image frame which can enable parallel encoding

Flags : Read / Write

Default value : 0

tile-rows 

“tile-rows” guint

Partition into separate horizontal tile rows from image frame which can enable parallel encoding

Flags : Read / Write

Default value : 0

undershoot-pct 

“undershoot-pct” guint

Rate control adaptation undershoot control

Flags : Read / Write

Default value : 25

Named constants

Av1enc-end-usage-mode

Members

vbr (0) – Variable Bit Rate Mode
cbr (1) – Constant Bit Rate Mode
cq (2) – Constrained Quality Mode
q (3) – Constant Quality Mode

Av1enc-resize-mode

Members

none (0) – No frame resizing allowed
fixed (1) – All frames are coded at the specified scale
random (2) – All frames are coded at a random scale

Av1enc-superres-mode

Members

none (0) – No frame superres allowed
fixed (1) – All frames are coded at the specified scale and super-resolved
random (2) – All frames are coded at a random scale and super-resolved
qthresh (3) – Superres scale for a frame is determined based on q_index

The results of the search are