# qtismartvencbin The qtismartvencbin plugin uses machine learning and computer vision to reduce the video bandwidth. It can be used for surveillance, where only the small image areas are in motion. The bitrate reduction can be configured according to the quality requirements. The qtismartvencbin plugin implements the following: - A GStreamer bin that has a video encoder and integrates computer vision APIs. - The post-processed person-detection results from the machine learning pipeline. **Figure : qtismartvencbin architecture** The following tables provide information on pad templates and element properties of qtismartvencbin. For use cases, see [Smart codec](https://docs.qualcomm.com/doc/80-80021-50/topic/smart-codec.html). ## Pad configuration | **Pad Name** | **Capabilities** | **Capabilities** | **Capabilities** | | --- | --- | --- | --- | |
SINK template: 'sink'

Availability: Always

Direction: sink

| video/x-raw | format | {NV12} | |
SINK template: 'sink'

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

| video/x-raw(memory:GBM) | format | {NV12} | |
SINK template: 'sink'

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

| video/x-raw | format | {NV12} | |
SINK template: 'sink\_ctrl'

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

| video/x-raw(memory:GBM) | format | {NV12} | |
SINK template: 'sink\_ctrl'

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

Availability: Always

Direction: sink

| text/x-raw | format | {utf-8} | | SRC template: 'src'

Availability: Always

Direction: source

| video/x-h264 video/x-h265 | – | – | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ## Element configuration Table : Element properties of qtismartvencbin | Property | Description | | --- | --- | | async-handling | The bin handles the asynchronous state changes.

flags: readable, writable

Boolean. Default: false

| | default-gop | The default GOP length.

flags: readable, writable, changeable only in NULL or READY state

Unsigned Integer. Range: 0 - 4294967295 Default: 30

| | encoder | The encoder to use (callable only in NULL state).

flags: readable, writable, changeable only in NULL or READY state

Enum "GstBinEncoderType" Default: 0, "c2enc"
- (0): c2enc - Codec2 encoder.
- (1): omxenc - OMX encoder.
- (2): v4l2h264enc - V4L2 H264 encoder
- (3): v4l2h265enc - V4L2 H265 encoder

| | levels-override | The override framerate levels. For example:"LevelsOverride,fr\_static=16,fr\_low=4,fr\_medium=2,fr\_high=1;"

flags: readable, writable

string. Default: null

| | max-bitrate | The maximum bitrate in bits per second.

flags: readable, writable, changeable only in NULL or READY state

Unsigned Integer. Range: 0 - 4294967295 Default: 6000000

| | max-gop | The maximum GOP length.

flags: readable, writable, changeable only in NULL or READY state

Unsigned Integer. Range: 0 - 4294967295 Default: 600

| | message-forward | Forwards all children messages.

flags: readable, writable

Boolean. Default: false

| | name | The name of the object.

flags: readable, writable, 0x2000

String. Default: "videoencbin0"

| | parent | The parent of the object.

flags: readable, writable, 0x2000

Object of type "GstObject"

| | roi-quality-cfg | The ROI quality configuration. For example: "ROIQPs,car=2,person=1,tree=-2;"

flags: readable, writable

String. Default: null

| | smart-framerate | Enable/disable the smart framerate functionality.

flags: readable, writable, changeable only in NULL or READY state

Boolean. Default: true

| | smart-gop | Enable/disable the smart GOP functionality.

flags: readable, writable, changeable only in NULL or READY state

Boolean. Default: true

| Last Published: Mar 26, 2026 [Previous Topic qtirtspbin](https://docs.qualcomm.com/bundle/publicresource/80-80021-50/topics/qtirtspbin.md) [Next Topic Develop plugins using Qualcomm IM SDK](https://docs.qualcomm.com/bundle/publicresource/80-80021-50/topics/develop-plugins-for-sdk.md) Source: [https://docs.qualcomm.com/doc/80-80021-50/topic/qtismartvencbin.html](https://docs.qualcomm.com/doc/80-80021-50/topic/qtismartvencbin.html)