diff --git a/libavformat/isom.h b/libavformat/isom.h
index e326f4f27f..bbe395ee4b 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -220,6 +220,8 @@ typedef struct MOVStreamContext {
     MOVSbgp *rap_group;
     unsigned int sync_group_count;
     MOVSbgp *sync_group;
+    uint8_t *sgpd_sync;
+    uint32_t sgpd_sync_count;
 
     int nb_frames_for_fps;
     int64_t duration_for_fps;
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 6221bb0490..3127bdf23d 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -3130,6 +3130,62 @@ static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     return 0;
 }
 
+static int mov_read_sgpd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
+{
+    AVStream *st;
+    MOVStreamContext *sc;
+    uint8_t version;
+    uint32_t grouping_type;
+    uint32_t default_length;
+    av_unused uint32_t default_group_description_index;
+    uint32_t entry_count;
+
+    if (c->fc->nb_streams < 1)
+        return 0;
+    st = c->fc->streams[c->fc->nb_streams - 1];
+    sc = st->priv_data;
+
+    version = avio_r8(pb); /* version */
+    avio_rb24(pb); /* flags */
+    grouping_type = avio_rl32(pb);
+
+    /*
+     * This function only supports "sync" boxes, but the code is able to parse
+     * other boxes (such as "tscl", "tsas" and "stsa")
+     */
+    if (grouping_type != MKTAG('s','y','n','c'))
+        return 0;
+
+    default_length = version >= 1 ? avio_rb32(pb) : 0;
+    default_group_description_index = version >= 2 ? avio_rb32(pb) : 0;
+    entry_count = avio_rb32(pb);
+
+    av_freep(&sc->sgpd_sync);
+    sc->sgpd_sync_count = entry_count;
+    sc->sgpd_sync = av_calloc(entry_count, sizeof(*sc->sgpd_sync));
+    if (!sc->sgpd_sync)
+        return AVERROR(ENOMEM);
+
+    for (uint32_t i = 0; i < entry_count && !pb->eof_reached; i++) {
+        uint32_t description_length = default_length;
+        if (version >= 1 && default_length == 0)
+            description_length = avio_rb32(pb);
+        if (grouping_type == MKTAG('s','y','n','c')) {
+            const uint8_t nal_unit_type = avio_r8(pb) & 0x3f;
+            sc->sgpd_sync[i] = nal_unit_type;
+            description_length -= 1;
+        }
+        avio_skip(pb, description_length);
+    }
+
+    if (pb->eof_reached) {
+        av_log(c->fc, AV_LOG_WARNING, "reached eof, corrupted SGPD atom\n");
+        return AVERROR_EOF;
+    }
+
+    return 0;
+}
+
 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 {
     AVStream *st;
@@ -4375,6 +4431,7 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     av_freep(&sc->elst_data);
     av_freep(&sc->rap_group);
     av_freep(&sc->sync_group);
+    av_freep(&sc->sgpd_sync);
 
     return 0;
 }
@@ -7255,6 +7312,7 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
 { MKTAG('c','m','o','v'), mov_read_cmov },
 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
 { MKTAG('d','v','c','1'), mov_read_dvc1 },
+{ MKTAG('s','g','p','d'), mov_read_sgpd },
 { MKTAG('s','b','g','p'), mov_read_sbgp },
 { MKTAG('h','v','c','C'), mov_read_glbl },
 { MKTAG('u','u','i','d'), mov_read_uuid },
@@ -7715,6 +7773,7 @@ static int mov_read_close(AVFormatContext *s)
         av_freep(&sc->elst_data);
         av_freep(&sc->rap_group);
         av_freep(&sc->sync_group);
+        av_freep(&sc->sgpd_sync);
         av_freep(&sc->display_matrix);
         av_freep(&sc->index_ranges);