diff --git a/libavcodec/vvc_mp4toannexb_bsf.c b/libavcodec/vvc_mp4toannexb_bsf.c
index 7011ae6a54221..c6c0e72022654 100644
--- a/libavcodec/vvc_mp4toannexb_bsf.c
+++ b/libavcodec/vvc_mp4toannexb_bsf.c
@@ -55,12 +55,15 @@ static int vvc_extradata_to_annexb(AVBSFContext *ctx)
     length_size = (( temp & 6) >> 1) + 1;
     ptl_present = temp & 1;
     if (ptl_present) {
-		int num_bytes_constraint_info;
-		int general_profile_idc;
-		int general_tier_flag;
-		int ptl_num_sub_profiles;
-		int temp3, temp4;
-		int temp2 = bytestream2_get_be16(&gb);
+        int num_bytes_constraint_info;
+        int general_profile_idc;
+        int general_tier_flag;
+        int general_level_idc;
+        int ptl_frame_only_constraint_flag;
+        int ptl_multi_layer_enabled_flag;
+        int ptl_num_sub_profiles;
+        int temp3, temp4, temp5;
+        int temp2 = bytestream2_get_be16(&gb);
         int ols_idx  = (temp2 >> 7) & 0x1ff;
         int num_sublayers  = (temp2 >> 4) & 0x7;
         int constant_frame_rate = (temp2 >> 2) & 0x3;
@@ -74,24 +77,37 @@ static int vvc_extradata_to_annexb(AVBSFContext *ctx)
         temp4 = bytestream2_get_byte(&gb);
         general_profile_idc = (temp4 >> 1) & 0x7f;
         general_tier_flag = (temp4) & 1;
+        general_level_idc = bytestream2_get_byte(&gb);
         av_log(ctx, AV_LOG_DEBUG,
             "general_profile_idc %d, num_sublayers %d num_bytes_constraint_info %d\n", general_profile_idc, num_sublayers, num_bytes_constraint_info);
-        for (i = 0; i < num_bytes_constraint_info; i++)
-            // unsigned int(1) ptl_frame_only_constraint_flag;
-            // unsigned int(1) ptl_multi_layer_enabled_flag;
+
+        temp5 = bytestream2_get_byte(&gb);
+        ptl_frame_only_constraint_flag = (temp5 >> 7) & 0x1;
+        ptl_multi_layer_enabled_flag   = (temp5 >> 6) & 0x1;
+        for (i = 0; i < num_bytes_constraint_info-1; i++) {
             // unsigned int(8*num_bytes_constraint_info - 2) general_constraint_info;
             bytestream2_get_byte(&gb);
-        /*for (i=num_sublayers - 2; i >= 0; i--)
-            unsigned int(1) ptl_sublayer_level_present_flag[i];
-        for (j=num_sublayers; j<=8 && num_sublayers > 1; j++)
-            bit(1) ptl_reserved_zero_bit = 0;
-        */
-        bytestream2_get_byte(&gb);
-        /*for (i=num_sublayers-2; i >= 0; i--)
-            if (ptl_sublayer_level_present_flag[i])
-                unsigned int(8) sublayer_level_idc[i]; */
-        ptl_num_sub_profiles = bytestream2_get_byte(&gb); // unsigned int(8) sublayer_level_idc;
+        }
 
+        if( num_sublayers > 1 )
+        {
+            int temp6 = bytestream2_get_byte(&gb);
+            uint8_t ptl_sublayer_level_present_flag[8] = {0};
+            uint8_t sublayer_level_idc[8] = {0};
+            for (i=num_sublayers - 2; i >= 0; i--){
+                ptl_sublayer_level_present_flag[i] = (temp6 >> (7 - (num_sublayers - 2 - i))) & 0x01;
+            }
+            // for (j=num_sublayers; j<=8 && num_sublayers > 1; j++)
+            //     bit(1) ptl_reserved_zero_bit = 0;
+            for (i=num_sublayers-2; i >= 0; i--)
+            {
+                if (ptl_sublayer_level_present_flag[i]) {
+                    sublayer_level_idc[i] = bytestream2_get_byte(&gb);
+                }
+            }
+        }
+
+        ptl_num_sub_profiles = bytestream2_get_byte(&gb);
         for (j=0; j < ptl_num_sub_profiles; j++) {
             // unsigned int(32) general_sub_profile_idc[j];
             bytestream2_get_be16(&gb);
@@ -192,7 +208,8 @@ static int vvc_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *out)
     AVPacket *in;
     GetByteContext gb;
 
-    int got_irap = 0;
+    int is_irap  = 0;
+    int added_extra = 0;
     int i, ret = 0;
 
     ret = ff_bsf_get_packet(ctx, &in);
@@ -207,10 +224,37 @@ static int vvc_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *out)
 
     bytestream2_init(&gb, in->data, in->size);
 
+    /* check if this packet contains an IRAP. The extradata will need to be added before any potential PH_NUT */
+    while (bytestream2_get_bytes_left(&gb)) {
+        uint32_t nalu_size = 0;
+        int      nalu_type;
+
+        if (bytestream2_get_bytes_left(&gb) < s->length_size) {
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+
+        for (i = 0; i < s->length_size; i++)
+            nalu_size = (nalu_size << 8) | bytestream2_get_byte(&gb);
+
+        if (nalu_size < 2 || nalu_size > bytestream2_get_bytes_left(&gb)) {
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+
+        nalu_type = (bytestream2_peek_be16(&gb) >> 3) & 0x1f;
+        is_irap   = nalu_type >= VVC_IDR_W_RADL && nalu_type <= VVC_RSV_IRAP_11;
+        if (is_irap) {
+          break;
+        }
+        bytestream2_seek(&gb, nalu_size, SEEK_CUR);
+    }
+
+    bytestream2_seek(&gb, 0, SEEK_SET);
     while (bytestream2_get_bytes_left(&gb)) {
         uint32_t nalu_size = 0;
         int      nalu_type;
-        int is_irap, add_extradata, extra_size, prev_size;
+        int add_extradata, extra_size, prev_size;
 
         if (bytestream2_get_bytes_left(&gb) < s->length_size) {
             ret = AVERROR_INVALIDDATA;
@@ -228,10 +272,9 @@ static int vvc_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *out)
         nalu_type = (bytestream2_peek_be16(&gb) >> 3) & 0x1f;
 
         /* prepend extradata to IRAP frames */
-        is_irap       = nalu_type >= 16 && nalu_type <= 23;
-        add_extradata = is_irap && !got_irap;
+        add_extradata = is_irap && nalu_type != VVC_AUD_NUT && !added_extra;
         extra_size    = add_extradata * ctx->par_out->extradata_size;
-        got_irap     |= is_irap;
+        added_extra  |= add_extradata;
 
         if (FFMIN(INT_MAX, SIZE_MAX) < 4ULL + nalu_size + extra_size) {
             ret = AVERROR_INVALIDDATA;