STRUCT V4L2_EVENT_MOTION_DET(9)

💖 struct v4l2_event_motion_det(9) — motion detection event 💖

okay so bestie, this is a page straight outta the Kernel API Manual, and it's literally the lil struct that tells you motion got detected 👀✨ Think of it as the group chat notification that says "bestie… something moved" 🎀

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🌸 NAME 🌸

struct v4l2_event_motion_det — the motion detection event, periodt 💅

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✨ SYNOPSIS ✨

struct v4l2_event_motion_det {
    __u32 flags;
    __u32 frame_sequence;
    __u32 region_mask;
 };

no cap, that's the whole thing — three lil __u32 fields and she's iconic 👑

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🦋 Members 🦋

• flags — the vibe-check field 🫶 if V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ is set, then the frame_sequence field is valid. If it's not set… yeah, don't trust that number, bestie 😭
• frame_sequence — the frame sequence number associated with this event 🔥 so like, which frame got the motion moment 💫
• region_mask — which regions detected motion 🌈 it's giving "map of where the drama happened" 🗺️✨

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🎀 SEE ALSO 🎀

• Kernel file ./include/uapi/linux/videodev2.h
• struct v4l2_capability(9)
• struct v4l2_plane(9)
• struct v4l2_buffer(9)
• v4l2_timeval_to_ns(9)
• struct v4l2_exportbuffer(9)
• struct v4l2_selection(9)
• struct v4l2_plane_pix_format(9)
• struct v4l2_pix_format_mplane(9)
• struct v4l2_sdr_format(9)
• struct v4l2_meta_format(9)
• struct v4l2_format(9)
• struct v4l2_create_buffers(9)
• struct v4l2_remove_buffers(9)

like… that's the whole friend group, go read 'em all iykyk 💜

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ngl this one's short and sweet — but don't sleep on it, region_mask is doing main character work 🌟

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k byeee, this was brought to you from ./include/uapi/linux, dated October 2026 — stay iconic, bestie 🧚💖💅