diff --git a/configure b/configure
index 90914752f1..77272948e3 100755
--- a/configure
+++ b/configure
@@ -2354,6 +2354,7 @@ CONFIG_EXTRA="
     cbs_av1
     cbs_h264
     cbs_h265
+    cbs_h266
     cbs_jpeg
     cbs_mpeg2
     cbs_vp9
@@ -2622,6 +2623,7 @@ threads_if_any="$THREADS_LIST"
 cbs_av1_select="cbs"
 cbs_h264_select="cbs"
 cbs_h265_select="cbs"
+cbs_h266_select="cbs"
 cbs_jpeg_select="cbs"
 cbs_mpeg2_select="cbs"
 cbs_vp9_select="cbs"
@@ -3158,6 +3160,7 @@ av1_qsv_decoder_select="qsvdec"
 aac_parser_select="adts_header"
 av1_parser_select="cbs_av1"
 h264_parser_select="atsc_a53 golomb h264dsp h264parse"
+h266_parser_select="cbs_h266"
 hevc_parser_select="hevcparse"
 mpegaudio_parser_select="mpegaudioheader"
 mpegvideo_parser_select="mpegvideo"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 4045c002b7..82cc9b8b93 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1098,6 +1098,7 @@ OBJS-$(CONFIG_GSM_PARSER)              += gsm_parser.o
 OBJS-$(CONFIG_H261_PARSER)             += h261_parser.o
 OBJS-$(CONFIG_H263_PARSER)             += h263_parser.o
 OBJS-$(CONFIG_H264_PARSER)             += h264_parser.o h264_sei.o h264data.o
+OBJS-$(CONFIG_H266_PARSER)             += h266_parser.o
 OBJS-$(CONFIG_HEVC_PARSER)             += hevc_parser.o hevc_data.o
 OBJS-$(CONFIG_IPU_PARSER)              += ipu_parser.o
 OBJS-$(CONFIG_JPEG2000_PARSER)         += jpeg2000_parser.o
diff --git a/libavcodec/h2645_parse.c b/libavcodec/h2645_parse.c
index 0f98b49fbe..2600371d3c 100644
--- a/libavcodec/h2645_parse.c
+++ b/libavcodec/h2645_parse.c
@@ -29,6 +29,7 @@
 #include "bytestream.h"
 #include "hevc.h"
 #include "h264.h"
+#include "h266.h"
 #include "h2645_parse.h"
 
 int ff_h2645_extract_rbsp(const uint8_t *src, int length,
@@ -146,6 +147,47 @@ nsc:
     return si;
 }
 
+static const char *h266_nal_type_name[64] = {
+    "TRAIL", //H266_NAL_TRAIL
+    "STSA", //H266_NAL_STSA
+    "RADL", //H266_NAL_RADL
+    "RASL", //H266_NAL_RASL
+    "RSV_VCL_4", //H266_NAL_RSV_VCL_4
+    "RSV_VCL_5", //H266_NAL_RSV_VCL_5
+    "RSV_VCL_6", //H266_NAL_RSV_VCL_6
+    "IDR_W_RAD", //H266_NAL_IDR_W_RADL
+    "IDR_N_LP", //H266_NAL_IDR_N_LP
+    "CRA_NUT", //H266_NAL_CRA_NUT
+    "GDR_NUT", //H266_NAL_GDR_NUT
+    "RSV_IRAP_11", //H266_NAL_RSV_IRAP_11
+    "OPI", //H266_NAL_OPI
+    "DCI", //H266_NAL_DCI
+    "VPS", //H266_NAL_VPS
+    "SPS", //H266_NAL_SPS
+    "PPS", //H266_NAL_PPS
+    "PREFIX_AP", //H266_NAL_PREFIX_APS
+    "SUFFIX_AP", //H266_NAL_SUFFIX_APS
+    "PH", //H266_NAL_PH
+    "AUD", //H266_NAL_AUD
+    "EOS_NUT", //H266_NAL_EOS_NUT
+    "EOB_NUT", //H266_NAL_EOB_NUT
+    "PREFIX_SE", //H266_NAL_PREFIX_SEI
+    "SUFFIX_SE", //H266_NAL_SUFFIX_SEI
+    "FD_NUT", //H266_NAL_FD_NUT
+    "RSV_NVCL_26", //H266_NAL_RSV_NVCL_26
+    "RSV_NVCL_27", //H266_NAL_RSV_NVCL_27
+    "UNSPEC_28", //H266_NAL_UNSPEC_28
+    "UNSPEC_29", //H266_NAL_UNSPEC_29
+    "UNSPEC_30", //H266_NAL_UNSPEC_30
+    "UNSPEC_31", //H266_NAL_UNSPEC_31
+};
+
+static const char *h266_nal_unit_name(int nal_type)
+{
+    av_assert0(nal_type >= 0 && nal_type < 32);
+    return h266_nal_type_name[nal_type];
+}
+
 static const char *hevc_nal_type_name[64] = {
     "TRAIL_N", // HEVC_NAL_TRAIL_N
     "TRAIL_R", // HEVC_NAL_TRAIL_R
@@ -289,6 +331,32 @@ static int get_bit_length(H2645NAL *nal, int skip_trailing_zeros)
  * @return AVERROR_INVALIDDATA if the packet is not a valid NAL unit,
  * 0 otherwise
  */
+static int h266_parse_nal_header(H2645NAL *nal, void *logctx)
+{
+    GetBitContext *gb = &nal->gb;
+
+    if (get_bits1(gb) != 0)     //forbidden_zero_bit
+        return AVERROR_INVALIDDATA;
+
+    if (get_bits1(gb) != 0)     //nuh_reserved_zero_bit
+        return AVERROR_INVALIDDATA;
+
+    nal->nuh_layer_id = get_bits(gb, 6);
+    nal->type = get_bits(gb, 5);
+    nal->temporal_id = get_bits(gb, 3) - 1;
+    if (nal->temporal_id < 0)
+        return AVERROR_INVALIDDATA;
+
+    if ((nal->type >= H266_NAL_IDR_W_RADL && nal->type <= H266_NAL_RSV_IRAP_11) && nal->temporal_id)
+        return AVERROR_INVALIDDATA;
+
+    av_log(logctx, AV_LOG_DEBUG,
+      "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n",
+           nal->type, h266_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id);
+
+    return 0;
+}
+
 static int hevc_parse_nal_header(H2645NAL *nal, void *logctx)
 {
     GetBitContext *gb = &nal->gb;
@@ -503,8 +571,9 @@ int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length,
 
         /* Reset type in case it contains a stale value from a previously parsed NAL */
         nal->type = 0;
-
-        if (codec_id == AV_CODEC_ID_HEVC)
+        if (codec_id == AV_CODEC_ID_H266)
+            ret = h266_parse_nal_header(nal, logctx);
+        else if (codec_id == AV_CODEC_ID_HEVC)
             ret = hevc_parse_nal_header(nal, logctx);
         else
             ret = h264_parse_nal_header(nal, logctx);
diff --git a/libavcodec/h266_parser.c b/libavcodec/h266_parser.c
new file mode 100644
index 0000000000..e472e51d59
--- /dev/null
+++ b/libavcodec/h266_parser.c
@@ -0,0 +1,284 @@
+/*
+ * h266 parser
+ *
+ * Copyright (C) 2029 Nuo Mi <nuomi2021@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "cbs.h"
+#include "cbs_h266.h"
+#include "internal.h"
+#include "parser.h"
+
+#define START_CODE 0x000001 ///< start_code_prefix_one_3bytes
+
+#define IS_SLICE(nut) (nut <= H266_NAL_RASL || (nut >= H266_NAL_IDR_W_RADL && nut <= H266_NAL_GDR_NUT))
+
+typedef struct H266ParserContext {
+    ParseContext pc;
+    CodedBitstreamContext *cbc;
+    CodedBitstreamFragment picture_unit;
+    int parsed_extradata;
+} H266ParserContext;
+
+static const enum AVPixelFormat pix_fmts_8bit[] = {
+    AV_PIX_FMT_GRAY8, AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P
+};
+
+static const enum AVPixelFormat pix_fmts_10bit[] = {
+    AV_PIX_FMT_GRAY10, AV_PIX_FMT_YUV420P10,
+    AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10
+};
+
+static int get_format(const H266RawSPS* sps)
+{
+    switch (sps->sps_bitdepth_minus8) {
+        case 0:
+            return pix_fmts_8bit[sps->sps_chroma_format_idc];
+        case 2:
+            return pix_fmts_10bit[sps->sps_chroma_format_idc];
+    }
+    return AV_PIX_FMT_NONE;
+}
+
+/**
+ * Find the end of the current frame in the bitstream.
+ * @return the position of the first byte of the next frame, or END_NOT_FOUND
+ */
+static int find_frame_end(AVCodecParserContext *s, const uint8_t *buf,
+                               int buf_size)
+{
+    H266ParserContext *ctx = s->priv_data;
+    ParseContext       *pc = &ctx->pc;
+    int i;
+
+    for (i = 0; i < buf_size; i++) {
+        int nut;
+
+        pc->state64 = (pc->state64 << 8) | buf[i];
+
+        if (((pc->state64 >> 3 * 8) & 0xFFFFFF) != START_CODE)
+            continue;
+
+        nut = (pc->state64 >> (8 + 3)) & 0x1F;
+        // Beginning of access unit
+        if ((nut >= H266_NAL_OPI && nut <= H266_NAL_EOB_NUT && nut != H266_NAL_PH) ||
+            nut == H266_NAL_PREFIX_SEI ||
+            (nut >= 26 && nut <= 31)) {
+            if (pc->frame_start_found) {
+                pc->frame_start_found = 0;
+                return i - 5;
+            }
+        } else if (nut == H266_NAL_PH  || IS_SLICE(nut)) {
+            int sh_picture_header_in_slice_header_flag = buf[i] >> 7;
+
+            if (nut == H266_NAL_PH || sh_picture_header_in_slice_header_flag) {
+                if (!pc->frame_start_found) {
+                    pc->frame_start_found = 1;
+                } else { // First slice of next frame found
+                    pc->frame_start_found = 0;
+                    return i - 5;
+                }
+            }
+        }
+    }
+    return END_NOT_FOUND;
+}
+
+static int get_pict_type(const CodedBitstreamFragment *pu)
+{
+    int has_p = 0;
+    for (int i = 0; i < pu->nb_units; i++) {
+        CodedBitstreamUnit *unit = &pu->units[i];
+        if (IS_SLICE(unit->type)) {
+            const H266RawSlice *slice = unit->content;
+            uint8_t type = slice->header.sh_slice_type;
+            if (type == H266_SLICE_B) {
+                return AV_PICTURE_TYPE_B;
+            }
+            if (type == H266_SLICE_P) {
+                has_p = 1;
+            }
+        }
+    }
+    return has_p ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
+}
+
+/**
+ * Parse NAL units of found picture and decode some basic information.
+ *
+ * @param s parser context.
+ * @param avctx codec context.
+ * @param buf buffer with field/frame data.
+ * @param buf_size size of the buffer.
+ */
+static int parse_nal_units(AVCodecParserContext *ctx, const uint8_t *buf,
+                           int buf_size, AVCodecContext *avctx)
+{
+    H266ParserContext *s = ctx->priv_data;
+    CodedBitstreamFragment *pu = &s->picture_unit;
+    CodedBitstreamH266Context *h266 = s->cbc->priv_data;
+    const H266RawSPS *sps;
+    const H266RawPPS *pps;
+    const H266RawPH *ph;
+    int ret, num = 0, den = 0;
+
+    /* set some sane default values */
+    ctx->pict_type         = AV_PICTURE_TYPE_I;
+    ctx->key_frame         = 0;
+    ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
+
+    s->cbc->log_ctx = avctx;
+
+    if (avctx->extradata_size && !s->parsed_extradata) {
+        s->parsed_extradata = 1;
+
+        if ((ret = ff_cbs_read(s->cbc, pu, avctx->extradata, avctx->extradata_size)) < 0)
+            av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
+
+        ff_cbs_fragment_reset(pu);
+    }
+
+    if ((ret = ff_cbs_read(s->cbc, pu, buf, buf_size))< 0) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to parse picture unit.\n");
+        goto end;
+    }
+
+    sps = h266->active_sps;
+    pps = h266->active_pps;
+    ph = h266->active_ph;
+    if (!h266->active_pps || !h266->active_ph) {
+        av_log(avctx, AV_LOG_ERROR, "No pss or ph header available\n");
+        goto end;
+    }
+
+    ctx->key_frame = ph->ph_gdr_or_irap_pic_flag;
+
+    ctx->coded_width  = pps->pps_pic_width_in_luma_samples;
+    ctx->coded_height = pps->pps_pic_height_in_luma_samples;
+    ctx->width        = pps->pps_pic_width_in_luma_samples  - pps->pps_conf_win_left_offset - pps->pps_conf_win_right_offset;
+    ctx->height       = pps->pps_pic_height_in_luma_samples - pps->pps_conf_win_top_offset  - pps->pps_conf_win_bottom_offset;
+    ctx->pict_type    = get_pict_type(pu);
+    ctx->format       = get_format(sps);
+    avctx->profile  = sps->profile_tier_level.general_profile_idc;
+    avctx->level    = sps->profile_tier_level.general_level_idc;
+
+
+
+    if(sps->sps_ptl_dpb_hrd_params_present_flag && sps->sps_timing_hrd_params_present_flag) {
+        num = sps->sps_general_timing_hrd_parameters.num_units_in_tick;
+        den = sps->sps_general_timing_hrd_parameters.time_scale;
+    } else {
+        av_log(avctx, AV_LOG_INFO, "No sps_timing_hrd_params_present_flag in sps, the fps may not right.\n");
+        goto end;
+    }
+    if (num != 0 && den != 0)
+        av_reduce(&avctx->framerate.den, &avctx->framerate.num,
+                  num, den, 1 << 30);
+end:
+
+    ff_cbs_fragment_reset(pu);
+    s->cbc->log_ctx = NULL;
+    return 0;
+}
+
+static int h266_parser_parse(AVCodecParserContext *s, AVCodecContext *avctx,
+                      const uint8_t **poutbuf, int *poutbuf_size,
+                      const uint8_t *buf, int buf_size)
+{
+    int next;
+    H266ParserContext *ctx = s->priv_data;
+    ParseContext *pc = &ctx->pc;
+    int is_dummy_buf = !buf_size;
+    const uint8_t *dummy_buf = buf;
+
+    if (avctx->extradata && !ctx->parsed_extradata) {
+        av_log(avctx, AV_LOG_INFO, "extra data is not supported yet.\n");
+        return AVERROR_PATCHWELCOME;
+    }
+
+    if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
+        next = buf_size;
+    } else {
+        next = find_frame_end(s, buf, buf_size);
+        if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
+            *poutbuf      = NULL;
+            *poutbuf_size = 0;
+            return buf_size;
+        }
+    }
+
+    is_dummy_buf &= (dummy_buf == buf);
+
+    if (!is_dummy_buf)
+        parse_nal_units(s, buf, buf_size, avctx);
+
+    *poutbuf      = buf;
+    *poutbuf_size = buf_size;
+    return next;
+
+}
+
+static const CodedBitstreamUnitType decompose_unit_types[] = {
+    H266_NAL_TRAIL,
+    H266_NAL_STSA,
+    H266_NAL_RADL,
+    H266_NAL_RASL,
+    H266_NAL_IDR_W_RADL,
+    H266_NAL_IDR_N_LP,
+    H266_NAL_CRA_NUT,
+    H266_NAL_GDR_NUT,
+    H266_NAL_VPS,
+    H266_NAL_SPS,
+    H266_NAL_PPS,
+    H266_NAL_PH,
+    H266_NAL_AUD,
+};
+
+static av_cold int h266_parser_init(AVCodecParserContext *ctx)
+{
+    H266ParserContext *s = ctx->priv_data;
+    int ret;
+
+    ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_VVC, NULL);
+    if (ret < 0)
+        return ret;
+
+    s->cbc->decompose_unit_types    = (CodedBitstreamUnitType *)decompose_unit_types;
+    s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
+
+    return 0;
+}
+
+static void h266_parser_close(AVCodecParserContext *ctx)
+{
+    H266ParserContext *s = ctx->priv_data;
+
+    ff_cbs_fragment_free(&s->picture_unit);
+    ff_cbs_close(&s->cbc);
+    av_freep(&s->pc.buffer);
+}
+
+AVCodecParser ff_h266_parser = {
+    .codec_ids      = { AV_CODEC_ID_VVC },
+    .priv_data_size = sizeof(H266ParserContext),
+    .parser_init    = h266_parser_init,
+    .parser_close   = h266_parser_close,
+    .parser_parse   = h266_parser_parse,
+};
diff --git a/libavcodec/parsers.c b/libavcodec/parsers.c
index 83271d95a3..155aec71aa 100644
--- a/libavcodec/parsers.c
+++ b/libavcodec/parsers.c
@@ -49,6 +49,7 @@ extern AVCodecParser ff_gsm_parser;
 extern AVCodecParser ff_h261_parser;
 extern AVCodecParser ff_h263_parser;
 extern AVCodecParser ff_h264_parser;
+extern AVCodecParser ff_h266_parser;
 extern AVCodecParser ff_hevc_parser;
 extern AVCodecParser ff_ipu_parser;
 extern AVCodecParser ff_jpeg2000_parser;
