STRUCT V4L2_VP8_SEGMENT(9)

🎀 struct v4l2_vp8_segment(9) 🎀

okay so this is straight out of the Kernel API Manual, bestie — buckle up 💅

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✨ NAME ✨

struct v4l2_vp8_segment — the params for VP8 segment-based adjustments, iykyk 🦋

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🌸 SYNOPSIS 🌸

struct v4l2_vp8_segment {
    __s8 quant_update[4];
    __s8 lf_update[4];
    __u8 segment_probs[3];
    __u8 padding;
    __u32 flags;
 };

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💖 Members 💖

• quant_update — the update values for the segment quantizer, periodt.
• lf_update — update values for the loop filter level 🔥
• segment_probs — branch probabilities of the segment_id decoding tree. literally the vibes of the tree 🌈
• padding — a padding field. Should be zeroed by applications — no cap, zero it out 🙈
• flags — see V4L2_VP8_SEGMENT_FLAG_{} 👑

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🧚 Description 🧚

This structure is holding all the segment-based adjustments related parameters, and honestly? iconic.

For the deets, go look at the 'update_segmentation' part of the frame header syntax, and also section '9.3. Segment-Based Adjustments' of the VP8 specification — that's where the lore lives 📖✨

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💜 SEE ALSO 💜

• Kernel file ./include/uapi/linux/v4l2-controls.h
• enum v4l2_mpeg_video_av1_profile(9)
• enum v4l2_mpeg_video_av1_level(9)
• enum v4l2_stateless_h264_decode_mode(9)
• enum v4l2_stateless_h264_start_code(9)
• struct v4l2_ctrl_h264_sps(9)
• struct v4l2_ctrl_h264_pps(9)
• struct v4l2_ctrl_h264_scaling_matrix(9)
• struct v4l2_ctrl_h264_pred_weights(9)
• struct v4l2_h264_reference(9)
• struct v4l2_ctrl_h264_slice_params(9)
• struct v4l2_h264_dpb_entry(9)
• struct v4l2_ctrl_h264_decode_params(9)
• struct v4l2_ctrl_fwht_params(9)
• struct v4l2_vp8_loop_filter(9)
• struct v4l2_vp8_quantization(9)
• struct v4l2_vp8_entropy(9)
• struct v4l2_vp8_entropy_coder_state(9)
• struct v4l2_ctrl_vp8_frame(9)
• struct v4l2_ctrl_mpeg2_sequence(9)
• struct v4l2_ctrl_mpeg2_picture(9)
• struct v4l2_ctrl_mpeg2_quantisation(9)
• struct v4l2_ctrl_hevc_sps(9)
• struct v4l2_ctrl_hevc_pps(9)
• struct v4l2_hevc_dpb_entry(9)
• struct v4l2_hevc_pred_weight_table(9)
• struct v4l2_ctrl_hevc_slice_params(9)
• struct v4l2_ctrl_hevc_decode_params(9)
• struct v4l2_ctrl_hevc_scaling_matrix(9)
• struct v4l2_vp9_loop_filter(9)
• struct v4l2_vp9_quantization(9)
• struct v4l2_vp9_segmentation(9)
• struct v4l2_ctrl_vp9_frame(9)
• struct v4l2_vp9_mv_probs(9)
• struct v4l2_ctrl_vp9_compressed_hdr(9)
• struct v4l2_ctrl_av1_sequence(9)
• struct v4l2_ctrl_av1_tile_group_entry(9)
• enum v4l2_av1_warp_model(9)
• enum v4l2_av1_reference_frame(9)
• struct v4l2_av1_global_motion(9)
• enum v4l2_av1_frame_restoration_type(9)
• struct v4l2_av1_loop_restoration(9)
• struct v4l2_av1_cdef(9)
• enum v4l2_av1_segment_feature(9)
• struct v4l2_av1_segmentation(9)
• struct v4l2_av1_loop_filter(9)
• struct v4l2_av1_quantization(9)
• struct v4l2_av1_tile_info(9)
• enum v4l2_av1_frame_type(9)
• enum v4l2_av1_interpolation_filter(9)
• enum v4l2_av1_tx_mode(9)
• struct v4l2_ctrl_av1_frame(9)
• struct v4l2_ctrl_av1_film_grain(9)

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lowkey that's a whole friend group of references, go say hi to all of them 🫶

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and that's the whole page, bestie — sourced from ./include/uapi/linux, dated October 2026, slay 💅⭐