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→Software trigger command
<code>v4l2-ctl --set-selection=target=crop,top=0,left=0,width=$WIDTH,height=$HEIGHT</code>
<code>v4l2-ctl --set-selection=target=crop,top=0,left=0,width=$WIDTH,height=$HEIGHT</code>
Note: This method is not applicable to Raspberry Pi 5.
The maximum frame rate will be adjusted automatically after setting ROI.
The maximum frame rate will be adjusted automatically after setting ROI.
===== Set ROI =====
===== Set ROI =====
<code>v4l2-ctl --set-selection=target=crop,top=0,left=0,width=$WIDTH,height=$HEIGHT</code>
<code>v4l2-ctl --set-ctrl roi_x=0</code>
<code>v4l2-ctl --set-ctrl roi_y=0</code>
<code>v4l2-ctl --set-fmt-video=width=$WIDTH,height=$HEIGHT</code>
===== Set Framerate =====
===== Set Framerate =====
===== Set ROI and Framerate =====
===== Set ROI and Framerate =====
<code>v4l2-ctl --set-selection=target=crop,top=0,left=0,width=$WIDTH,height=$HEIGHT</code>
<code>v4l2-ctl --set-ctrl roi_x=0</code>
<code>v4l2-ctl --set-ctrl roi_y=0</code>
<code>v4l2-ctl --set-fmt-video=width=$WIDTH,height=$HEIGHT</code>
<code>v4l2-ctl --set-ctrl frame_rate=$FPS</code>
<code>v4l2-ctl --set-ctrl frame_rate=$FPS</code>