diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index f3501da6b3..2e8dd05ab4 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -281,6 +281,7 @@ static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x
 static const uint8_t mxf_random_index_pack_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
 static const uint8_t mxf_sony_mpeg4_extradata[]            = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
 static const uint8_t mxf_avid_project_name[]               = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
+static const uint8_t mxf_jp2k_rsiz[]                       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
 
 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
 
@@ -1000,6 +1001,12 @@ static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int
             descriptor->extradata_size = size;
             avio_read(pb, descriptor->extradata, size);
         }
+        if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
+            uint32_t rsiz = avio_rb16(pb);
+            if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
+                rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
+                descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
+        }
         break;
     }
     return 0;