# v4l2h265enc Source: [https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2h265enc.html](https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2h265enc.html) The v4l2h265enc plugin uses V4L2 APIs for encoding of video stream. This plugin utilizes H265 video encoder to provide hardware accelerated H.265 (MPEG-H Part 2) encoding on platforms that support it and is based on [GstVideoEncoder](https://gstreamer.freedesktop.org/documentation/video/gstvideoencoder.html?gi-language=c) base class. ## Inheritance chain [GObject](https://docs.gtk.org/gobject/) → [GstObject](https://gstreamer.freedesktop.org/documentation/gstreamer/gstobject.html?gi-language=c) → [GstElement](https://gstreamer.freedesktop.org/documentation/gstreamer/gstelement.html?gi-language=c) → [GstVideoEncoder](https://gstreamer.freedesktop.org/documentation/video/gstvideoencoder.html?gi-language=c) → GstV4l2VideoEnc → v4l2h265enc The following tables provide information on pad templates and element properties of v4l2h265enc. For use cases, see [Camera and video encode](https://docs.qualcomm.com/doc/80-70014-50/topic/camera-and-video-encode.html) and [Slice-based encoding](https://docs.qualcomm.com/doc/80-70014-50/topic/slice-based-encoding.html). ## Pad configuration | Pad Name | Capabilities | Capabilities | Capabilities | | --- | --- | --- | --- | | SINK template: 'sink'

Availability: Always

Direction: sink

| video/x-raw | format: | { (string)NV12, (string)NV21 } | | SINK template: 'sink'

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: source

Availability: Always

Direction: source

| video/x-h265 | stream-format: | byte-stream | | | | | | | | | | | | | | | | ## Element configuration Table : Element properties of v4l2h265enc | Property | Description | | --- | --- | | capture-io-mode | Capture I/O mode (matches src pad)

flags: readable, writable

Enum "GstV4l2IOMode" Default: 0, "auto"
- (0): auto - GST_V4L2_IO_AUTO
- (1): rw - GST_V4L2_IO_RW
- (2): mmap - GST_V4L2_IO_MMAP
- (3): userptr - GST_V4L2_IO_USERPTR
- (4): dmabuf - GST_V4L2_IO_DMABUF
- (5): dmabuf-import - GST_V4L2_IO_DMABUF_IMPORT

| | device | Device location

flags: readable

String. Default: "/dev/video1"

| | device-fd | File descriptor of the device

flags: readable

Integer. Range: -1 - 2147483647 Default: -1

| | device-name | Name of the device

flags: readable

String. Default: null

| | extra-controls | Extra v4l2 controls (CIDs) for the device

flags: readable, writable

Boxed pointer of type "GstStructure"

| | min-force-key-unit-interval | Minimum interval between force-key unit requests in
nanoseconds

flags: readable, writable

Unsigned Integer64. Range: 0 - 18446744073709551615 Default:
0

| | name | The name of the object

flags: readable, writable, 0x2000

String. Default: "v4l2h265enc0"

| | output-io-mode | Output side I/O mode (matches sink pad)

flags: readable, writable

Enum "GstV4l2IOMode" Default: 0, "auto"
- (0): auto - GST_V4L2_IO_AUTO
- (1): rw - GST_V4L2_IO_RW
- (2): mmap - GST_V4L2_IO_MMAP
- (3): userptr - GST_V4L2_IO_USERPTR
- (4): dmabuf - GST_V4L2_IO_DMABUF
- (5): dmabuf-import - GST_V4L2_IO_DMABUF_IMPORT

| | parent | The parent of the object

flags: readable, writable, 0x2000

Object of type "GstObject"

| | qos | Handle Quality-of-Service events from downstream

flags: readable, writable

Boolean. Default: true

| The table lists the codec controls for H.265. For the general v4l2ctl user and codec controls, see [Table : v4l2ctl extra-controls – user controls](https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2h264enc.html#v4l2h264enc__table_ss2_ljc_fbc) and [Table : v4l2ctl extra-controls – codec controls](https://docs.qualcomm.com/doc/80-70014-50/topic/v4l2h264enc.html#v4l2h264enc__table_o4d_tjc_fbc). Table : v4l2ctl – H.265 codec controls | Control name | Control type | Parameters | | --- | --- | --- | | hevc\_minimum\_qp\_value | Integer |

min=1

max=51

step=1

value=1; this is the default value

flags=execute-on-write

| | hevc\_maximum\_qp\_value | Integer |

min=1

max=51

step=1

value=51; this is the default value

flags=execute-on-write

| | hevc\_i\_frame\_qp\_value | Integer |

min=1

max=51

step=1

value=20; this is the default value

flags=execute-on-write

| | hevc\_p\_frame\_qp\_value | Integer |

min=1

max=51

step=1

value=20; this is the default value

flags=execute-on-write

| | hevc\_b\_frame\_qp\_value | Integer |

min=1

max=51

step=1

value=20; this is the default value

flags=execute-on-write

| | hevc\_hierarchical\_coding\_type | Menu |

min=0

max=1

value=1 (P)
- 0: B
- 1: P; this is the default value

flags=execute-on-write

| | hevc\_hierarchical\_coding\_layer | Integer |

min=0

max=5

step=1

value=0; this is the default value

flags=execute-on-write

| | hevc\_profile | Menu |

min=0

max=2

default=0

value=0 (Main)
- 0: Main; this is the default value
- 1: Main Still Picture
- 2: Main 10

flags=execute-on-write

| | hevc\_level | Menu |

min=0

max=7

value=7 (5)
- 0: 1
- 1: 2
- 2: 2.1
- 3: 3
- 4: 3.1
- 5: 4
- 6: 4.1
- 7: 5; this is the default value

flags=execute-on-write

| | hevc\_hierarchical\_lay\_0\_bitrate | Integer |

min=1

max=100000000

step=1

value=20000000; this is the default value

flags=execute-on-write

| | hevc\_hierarchical\_lay\_1\_bitrate | Integer |

min=1

max=100000000

step=1

default=20000000; this is the default value

flags=execute-on-write

| | hevc\_hierarchical\_lay\_2\_bitrate | Integer |

min=1

max=100000000

step=1

value=20000000; this is the default value

flags=execute-on-write

| | hevc\_hierarchical\_lay\_3\_bitrate | Integer |

min=1

max=100000000

step=1

value=20000000; this is the default value

flags=execute-on-write

| | hevc\_hierarchical\_lay\_4\_bitrate | Integer |

min=1

max=100000000

step=1

value=20000000; this is the default value

flags=execute-on-write

| | hevc\_hierarchical\_lay\_5\_bitrate | Integer |

min=1

max=100000000

step=1

value=20000000; this is the default value

flags=execute-on-write

| | hevc\_i\_frame\_minimum\_qp\_value | Integer |

min=1

max=51

step=1

value=1; this is the default value

flags=execute-on-write

| | hevc\_i\_frame\_maximum\_qp\_value | Integer |

min=1

max=51

step=1

value=51; this is the default value

flags=execute-on-write

| | hevc\_p\_frame\_minimum\_qp\_value | Integer |

min=1

max=51

step=1

value=1; this is the default value

flags=execute-on-write

| | hevc\_p\_frame\_maximum\_qp\_value | Integer |

min=1

max=51

step=1

value=51; this is the default value

flags=execute-on-write

| | hevc\_b\_frame\_minimum\_qp\_value | Integer |

min=1

max=51

step=1

value=1; this is the default value

flags=execute-on-write

| | hevc\_b\_frame\_maximum\_qp\_value | Integer |

min=1

max=51

step=1

value=51; this is the default value

flags=execute-on-write

| **Parent Topic:** [Qualcomm GST plugins](https://docs.qualcomm.com/doc/80-70014-50/topic/qim-sdk-plugins.html) Last Published: Oct 27, 2025 [Previous Topic v4l2h264enc](https://docs.qualcomm.com/bundle/publicresource/80-70014-50/topics/v4l2h264enc.md) [Next Topic v4l2vp9dec](https://docs.qualcomm.com/bundle/publicresource/80-70014-50/topics/v4l2vp9dec.md)