# Camera dynamic parameters – update with gst-pipeline-app
Source: [https://docs.qualcomm.com/doc/80-88500-3/topic/48_Camera_dynamic_patametres___update_with_gst_pipeline_app.html](https://docs.qualcomm.com/doc/80-88500-3/topic/48_Camera_dynamic_patametres___update_with_gst_pipeline_app.html)
The Qualcomm gst-pipeline-app is the helper tool that exposes the same
capability as the GStreamer gst-launch-1.0 tool. It also provides an
option to set runtime properties for GST elements.
**Prerequisites**: Ensure that Weston is running.
To update the camera properties of the `qtiqmmfsrc` plug in at runtime and observe the changes on the display, do the following:
1. Run the following pipeline through
gst-pipeline-app.
- Linux
Ubuntu:
export XDG_RUNTIME_DIR=/run/user/root && gst-pipeline-app qtiqmmfsrc name=qmmf ! "video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1" ! waylandsink sync=false fullscreen=true enable-last-sample=falseCopy to clipboard
- Linux
Embedded:
export WAYLAND_DISPLAY=wayland-1 && export XDG_RUNTIME_DIR=/run/user/root && gst-pipeline-app qtiqmmfsrc name=qmmf ! "video/x-raw, format=NV12,width=1920,height=1080,framerate=30/1" ! waylandsink sync=false fullscreen=true enable-last-sample=falseCopy to clipboard
2. Type the name of the plug-in to be controlled.
qmmfCopy to clipboard
All the parameters that can be updated dynamically are displayed.
3. Choose the required option and provide inputs to on/off or set the appropriate value of that feature. The effect can be viewed on the live preview.
| **Feature** | **Action** |
| --- | --- |
| AF modes | Select af-mode |
| Exposure metering | Select ae-metering-mode |
| ISO setting | Select iso-mode |
| Manual exposure |
- Disable AE mode by selecting ae-mode and off.
- Select exposure-time.
|
| Digital zoom |
- Select zoom
- Check the selected to Sensor mode
`adb logcat | grep SelectedMode`
- Based on the selected sensor mode, adjust the input value to see the intended zoom effect.
**For example:**
If the selected sensor mode is 3840 x 2160
- Top-left zoom
- For 1x zoom, the input value should be <0,0,3840,2160>
- For 2x zoom, the sensor mode width and height should be divided by 2. So the input value would be <0,0,1920,1080>.
- Center zoom
For 2x zoom, specify the location(x,y) as the first 2 arguments. The input would be <960,540,1920,1080>. The (x,y) value is obtained by dividing the final resolution by 2. For a 2x zoom, the final resolution would be 1920 x 1080 and the center of the frame would be (960,540). |
| AWB modes | Select awb-mode |
| Dynamic exposure Tables | Select exposure-table
The input should be in the following format:
org.codeaurora.qcamera3.exposuretable, isValid=true,
sensitivityCorrectionFactor=1.0, kneeCount=1, gainKneeEntries=<1.0, 1.0,
32.0>, expTimeKneeEntries=(int)<10040, 33333333, 60000000>,
incrementPriorityKneeEntries=<1, 1, 1>, expIndexKneeEntries=<0.0,
274.2918, 434.8758>, thresAntiBandingMinExpTimePct=0.97;Copy to clipboard |
| Defog | Choose option: defog-table
The input should be in the following format:
org.quic.camera.defog, enable=true, algo_type=0, algo_decision_mode=1,
strength=1.0, convergence_speed=3, lp_color_comp_gain=1.0, abc_en=true,
acc_en=true, afsd_en=true, afsd_2a_en=true, defog_dark_thres=10,
defog_bright_thres=40, abc_gain=2.0, acc_max_dark_str=2.0,
acc_max_bright_str=2.0, dark_limit=255, bright_limit=0, dark_preserve=10,
bright_preserve=50, trig_params=<0.0, 1.0, 0, 1.5, 4.0, 100, 4.5, 8.0, 0, 0.0, 50.0, 0, 80.0, 450.0, 100, 510.0, 900.0,
0, 0.0, 2000.0, 0, 2300.0, 4500.0, 0, 5000.0, 8500.0, 100, 10000.0, 20000.0, 0, 0.0, 1.0, 100, 2.0, 64.0,
100>;Copy to clipboard |
| IR | Select infrared-mode |
| LTM (dynamic contrast) | Select ltm-data
The input should be in the following format:
org.quic.camera.ltmDynamicContrast, ltmDynamicContrastStrength=10.0,
ltmDarkBoostStrength=20.0, ltmBrightSupressStrength=30.0;Copy to clipboard |
| Automatic dynamic range compression (ADRC) | Can be enabled or disabled. |
| Advanced noise reduction (ANR) | Select ltm-data
The input should be in the following format:
org.quic.camera.anr_tuning, anr_intensity=50.0,
anr_motion_sensitivity=70.0;Copy to clipboard |
| Sharpness | Change sharpness value |
| Framerate | Change framerate value |
| Bit rate | Change bitrate value |
| IDR-interval | Change idr-interval value |
4. Verify zoom.
**Parent Topic:** [Multimedia use cases](https://docs.qualcomm.com/doc/80-88500-3/topic/28_Multimedia_use_cases.html)
Last Published: Sep 26, 2023
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