amfh264enc

amfh264enc element encodes raw video stream into compressed H.264 bitstream via AMD AMF API.

Example launch line

gst-launch-1.0 videotestsrc num-buffers=100 ! amfh264enc ! h264parse ! mp4mux ! filesink location=encoded.mp4

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstVideoEncoder
                    ╰──GstAmfEncoder
                        ╰──amfh264enc

Implemented interfaces

Factory details

Authors: – Seungha Yang

Classification: – Codec/Encoder/Video/Hardware

Rank – primary

Plugin – amfcodec

Package – GStreamer Bad Plug-ins

Pad Templates

sink

video/x-raw(memory:D3D11Memory):
         format: NV12
          width: [ 128, 4096 ]
         height: [ 128, 4096 ]
video/x-raw:
         format: NV12
          width: [ 128, 4096 ]
         height: [ 128, 4096 ]

Presence – always

Direction – sink

Object type – GstPad

src

video/x-h264:
          width: [ 128, 4096 ]
         height: [ 128, 4096 ]
        profile: { (string)main, (string)high, (string)constrained-baseline, (string)baseline }
  stream-format: { (string)avc, (string)byte-stream }
      alignment: au

Presence – always

Direction – src

Object type – GstPad

Properties

adapter-luid 

“adapter-luid” gint64

DXGI Adapter LUID (Locally Unique Identifier) of associated GPU

Flags : Read

Default value : 0

aud 

“aud” gboolean

Use AU (Access Unit) delimiter

Flags : Read / Write

Default value : true

bitrate 

“bitrate” guint

Target bitrate in kbit/sec (0: USAGE default)

Flags : Read / Write

Default value : 0

cabac 

“cabac” gboolean

Enable CABAC entropy coding

Flags : Read / Write

Default value : true

gop-size 

“gop-size” gint

Number of pictures within a GOP (-1: USAGE default)

Flags : Read / Write

Default value : -1

max-bitrate 

“max-bitrate” guint

Maximum bitrate in kbit/sec (0: USAGE default)

Flags : Read / Write

Default value : 0

max-qp 

“max-qp” gint

Maximum allowed QP value (-1: USAGE default)

Flags : Read / Write

Default value : -1

min-qp 

“min-qp” gint

Minimum allowed QP value (-1: USAGE default)

Flags : Read / Write

Default value : -1

preset 

“preset” Amf-h264enc-preset *

Preset

Flags : Read / Write

Default value : default (-1)

qp-i 

“qp-i” guint

Constant QP for I frames

Flags : Read / Write

Default value : 22

qp-p 

“qp-p” guint

Constant QP for P frames

Flags : Read / Write

Default value : 22

rate-control 

“rate-control” Amf-h264enc-rate-control *

Rate Control Method

Flags : Read / Write

Default value : default (-1)

ref-frames 

“ref-frames” guint

Number of reference frames

Flags : Read / Write

Default value : 1

usage 

“usage” Amf-h264enc-usage *

Target usage

Flags : Read / Write

Default value : transcoding (0)

Named constants

Amf-h264enc-preset

Encoding quality presets

Members

default (-1) – Default, depends on USAGE
balanced (0) – Balanced
speed (1) – Speed
quality (2) – Quality

Amf-h264enc-rate-control

Rate control methods

Members

default (-1) – Default, depends on Usage
cqp (0) – Constant QP
cbr (1) – Constant Bitrate
vbr (2) – Peak Constrained VBR
lcvbr (3) – Latency Constrained VBR

Amf-h264enc-usage

Encoder usages

Members

transcoding (0) – Transcoding
ultra-low-latency (1) – Ultra Low Latency
low-latency (2) – Low Latency
webcam (3) – Webcam

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