vaapimpeg2enc

Encodes raw video streams into MPEG2 bitstreams.

Example launch line

  gst-launch-1.0 -ev videotestsrc num-buffers=60 ! timeoverlay ! vaapimpeg2enc ! matroskamux ! filesink location=test.mkv

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstVideoEncoder
                    ╰──GstVaapiEncode
                        ╰──vaapimpeg2enc

Implemented interfaces

Factory details

Authors: – Guangxin Xu

Classification: – Codec/Encoder/Video/Hardware

Rank – primary

Plugin – vaapi

Package – gstreamer-vaapi

Pad Templates

sink

video/x-raw:
         format: { NV12, YV12, I420 }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
 interlace-mode: progressive

video/x-raw(memory:VASurface):
         format: { NV12, YV12, I420 }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
 interlace-mode: progressive

Presence – always

Direction – sink

Object type – GstPad

src

video/mpeg:
    mpegversion: 2
   systemstream: false

Presence – always

Direction – src

Object type – GstPad

Properties

bitrate 

“bitrate” guint

The desired bitrate expressed in kbps (0: auto-calculate)

Flags : Read / Write

Default value : 0

default-roi-delta-qp 

“default-roi-delta-qp” gint

The default delta-qp to apply to each Region of Interest(lower value means higher-quality, higher value means lower-quality)

Flags : Read / Write

Default value : -10

keyframe-period 

“keyframe-period” guint

Maximal distance between two keyframes (0: auto-calculate)

Flags : Read / Write

Default value : 30

max-bframes 

“max-bframes” guint

Number of B-frames between I and P

Flags : Read / Write

Default value : 0

min-force-key-unit-interval 

“min-force-key-unit-interval” guint64

Minimum interval between force-keyunit requests in nanoseconds

Flags : Read / Write

Default value : 0

qos 

“qos” gboolean

Handle Quality-of-Service events from downstream

Flags : Read / Write

Default value : false

quality-level 

“quality-level” guint

Encoding Quality Level (lower value means higher-quality/slow-encode, higher value means lower-quality/fast-encode)

Flags : Read / Write

Default value : 4

quantizer 

“quantizer” guint

Constant quantizer (if rate-control mode is CQP)

Flags : Read / Write

Default value : 8

rate-control 

“rate-control” Vaapi-rate-control-mpeg2 *

Rate control mode

Flags : Read / Write

Default value : cqp (1)

target-percentage 

“target-percentage” guint

The desired target percentage of bitrate for variable rate controls.

Flags : Read / Write

Default value : 70

trellis 

“trellis” gboolean

The Trellis Quantization Method of Encoder

Flags : Read / Write

Default value : false

tune 

“tune” Vaapi-encoder-tune-mpeg2 *

Encoder tuning option

Flags : Read / Write

Default value : none (0)

Named constants

Vaapi-encoder-tune-mpeg2

Members

none (0) – None

Vaapi-rate-control-mpeg2

Members

cqp (1) – Constant QP
cbr (2) – Constant bitrate

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