diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index 1e87dc6111..ba8e7babfb 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -227,7 +227,8 @@ static const UID mxf_d10_container_uls[] = {
     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 }, // D-10 525/50 NTSC 30mb/s
 };
 
-static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
+static const uint8_t product_uid[]          = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd,0x00,0x0c,0x00,0x02};
+static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff };
 static const uint8_t umid_ul[]              = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13 };
 
 /**
@@ -424,9 +425,9 @@ typedef struct MXFContext {
 
 static void mxf_write_uuid(AVIOContext *pb, enum MXFMetadataSetType type, int value)
 {
-    avio_write(pb, uuid_base, 12);
+    avio_write(pb, uuid_base, 10);
     avio_wb16(pb, type);
-    avio_wb16(pb, value);
+    avio_wb32(pb, value);
 }
 
 static void mxf_write_umid(AVFormatContext *s, int type)
@@ -797,7 +798,7 @@ static void mxf_write_identification(AVFormatContext *s)
 
     // write product uid
     mxf_write_local_tag(s, 16, 0x3C05);
-    mxf_write_uuid(pb, Identification, 2);
+    avio_write(pb, product_uid, 16);
 
     // modification date
     mxf_write_local_tag(s, 8, 0x3C06);
diff --git a/tests/ref/fate/copy-trac4914 b/tests/ref/fate/copy-trac4914
index 743dc8c055..0ed039bf37 100644
--- a/tests/ref/fate/copy-trac4914
+++ b/tests/ref/fate/copy-trac4914
@@ -1,4 +1,4 @@
-f5150fb82c1bb5a90906fce93dcc3f76 *tests/data/fate/copy-trac4914.mxf
+a0f68fa1d9ed5d3030d8244ea0b0299a *tests/data/fate/copy-trac4914.mxf
 561721 tests/data/fate/copy-trac4914.mxf
 #tb 0: 1001/30000
 #media_type 0: video
diff --git a/tests/ref/fate/mxf-d10-user-comments b/tests/ref/fate/mxf-d10-user-comments
index 64a2dec463..1b59beec7c 100644
--- a/tests/ref/fate/mxf-d10-user-comments
+++ b/tests/ref/fate/mxf-d10-user-comments
@@ -1,4 +1,4 @@
-6dc13ae283257e898e069e5041ac8435 *tests/data/fate/mxf-d10-user-comments.mxf_d10
+8c831b8e01aa4c86e98ab87930d06f3e *tests/data/fate/mxf-d10-user-comments.mxf_d10
 3782189 tests/data/fate/mxf-d10-user-comments.mxf_d10
 #extradata 0:       34, 0x716b05c4
 #tb 0: 1/25
@@ -13,8 +13,8 @@
 0,          3,          4,        1,   150000, 0x9bbe6feb, F=0x0
 [FORMAT]
 TAG:operational_pattern_ul=060e2b34.04010101.0d010201.01010900
-TAG:uid=adab4424-2f25-4dc7-92ff-29bd000c0000
-TAG:generation_uid=adab4424-2f25-4dc7-92ff-29bd000c0001
+TAG:uid=adab4424-2f25-4dc7-92ff-000c00000000
+TAG:generation_uid=adab4424-2f25-4dc7-92ff-000c00000001
 TAG:company_name=FATE-company
 TAG:product_name=FATE-test
 TAG:product_version_num=0.0.0.0.0
diff --git a/tests/ref/fate/mxf-opatom-user-comments b/tests/ref/fate/mxf-opatom-user-comments
index ec4fdff425..14a1cee1f2 100644
--- a/tests/ref/fate/mxf-opatom-user-comments
+++ b/tests/ref/fate/mxf-opatom-user-comments
@@ -1 +1 @@
-8475bebf3448a972ae89ba59309fd7d6
+d40b64e492133c74faa07e605eb65b2f
diff --git a/tests/ref/fate/mxf-reel_name b/tests/ref/fate/mxf-reel_name
index d50f0f6990..f3bafcc118 100644
--- a/tests/ref/fate/mxf-reel_name
+++ b/tests/ref/fate/mxf-reel_name
@@ -1 +1 @@
-ce49a0361d3f79106e1952d387eace51
+75e0ac14d5632d709bd805f1cacb1fbb
diff --git a/tests/ref/fate/mxf-user-comments b/tests/ref/fate/mxf-user-comments
index 5fcdc5806a..b4c78744b0 100644
--- a/tests/ref/fate/mxf-user-comments
+++ b/tests/ref/fate/mxf-user-comments
@@ -1 +1 @@
-956f653cd75e1a319569caec9df81b4f
+620ae205fefbb6dba74418f357a62c36
diff --git a/tests/ref/fate/time_base b/tests/ref/fate/time_base
index 28815d0828..fd6cac53fc 100644
--- a/tests/ref/fate/time_base
+++ b/tests/ref/fate/time_base
@@ -1 +1 @@
-78ac0348027b75d73acb8bea14e67a59
+d408aba82d62a90ed7f46a1999b014f1
diff --git a/tests/ref/lavf/mxf b/tests/ref/lavf/mxf
index 21bf2be513..3f0c74818a 100644
--- a/tests/ref/lavf/mxf
+++ b/tests/ref/lavf/mxf
@@ -1,9 +1,9 @@
-8938d5c4a396ff1b24d10d4f917ae1c9 *tests/data/lavf/lavf.mxf
+9ec1ad83b3400de11ca2f70b3b2d4c4d *tests/data/lavf/lavf.mxf
 526393 tests/data/lavf/lavf.mxf
 tests/data/lavf/lavf.mxf CRC=0x8dddfaab
-93ea2cfdf5dda7fffdc0d2fdcfb6a9a4 *tests/data/lavf/lavf.mxf
+546eb8c864c0d76c6a9d5303701e9031 *tests/data/lavf/lavf.mxf
 561721 tests/data/lavf/lavf.mxf
 tests/data/lavf/lavf.mxf CRC=0x96ff1b48
-87bdf844ae34bcc758e44419e80177a0 *tests/data/lavf/lavf.mxf
+5bd0ce691510e6fae969886c32ad7a14 *tests/data/lavf/lavf.mxf
 526393 tests/data/lavf/lavf.mxf
 tests/data/lavf/lavf.mxf CRC=0x8dddfaab
diff --git a/tests/ref/lavf/mxf_d10 b/tests/ref/lavf/mxf_d10
index 47ef244cb1..4644c3424d 100644
--- a/tests/ref/lavf/mxf_d10
+++ b/tests/ref/lavf/mxf_d10
@@ -1,3 +1,3 @@
-7f16902e28718c2a92bc082400a1c6ee *tests/data/lavf/lavf.mxf_d10
+74269c0a64b19269b127f64f3ce7fa6a *tests/data/lavf/lavf.mxf_d10
 5332013 tests/data/lavf/lavf.mxf_d10
 tests/data/lavf/lavf.mxf_d10 CRC=0x6c74d488
diff --git a/tests/ref/lavf/mxf_dv25 b/tests/ref/lavf/mxf_dv25
index 92509cf1f4..5022f1f62d 100644
--- a/tests/ref/lavf/mxf_dv25
+++ b/tests/ref/lavf/mxf_dv25
@@ -1,3 +1,3 @@
-106e33eb1634595623f0334e92204b65 *tests/data/lavf/lavf.mxf_dv25
+3339def72599c79ad5860c6860cc3123 *tests/data/lavf/lavf.mxf_dv25
 3834413 tests/data/lavf/lavf.mxf_dv25
 tests/data/lavf/lavf.mxf_dv25 CRC=0xbdaf7f52
diff --git a/tests/ref/lavf/mxf_dvcpro50 b/tests/ref/lavf/mxf_dvcpro50
index 2d569b0553..5be1b6875e 100644
--- a/tests/ref/lavf/mxf_dvcpro50
+++ b/tests/ref/lavf/mxf_dvcpro50
@@ -1,3 +1,3 @@
-3d5a303c22666996700f0e8f6e4cb938 *tests/data/lavf/lavf.mxf_dvcpro50
+8494122b2a8e8e5998ace60d4d508d46 *tests/data/lavf/lavf.mxf_dvcpro50
 7431213 tests/data/lavf/lavf.mxf_dvcpro50
 tests/data/lavf/lavf.mxf_dvcpro50 CRC=0xe3bbe4b4
diff --git a/tests/ref/lavf/mxf_opatom b/tests/ref/lavf/mxf_opatom
index e5c5276835..75f85b604e 100644
--- a/tests/ref/lavf/mxf_opatom
+++ b/tests/ref/lavf/mxf_opatom
@@ -1,3 +1,3 @@
-b2da9e38d692fd1866101ebae273bfc0 *tests/data/lavf/lavf.mxf_opatom
+215ea72602bfeb70e99fc9d79fef073c *tests/data/lavf/lavf.mxf_opatom
 4717625 tests/data/lavf/lavf.mxf_opatom
 tests/data/lavf/lavf.mxf_opatom CRC=0xb13ba2f8
diff --git a/tests/ref/lavf/mxf_opatom_audio b/tests/ref/lavf/mxf_opatom_audio
index 97362e7aa4..0e034991c0 100644
--- a/tests/ref/lavf/mxf_opatom_audio
+++ b/tests/ref/lavf/mxf_opatom_audio
@@ -1,3 +1,3 @@
-c356a3fdd49a1e015961678e837c12bb *tests/data/lavf/lavf.mxf_opatom_audio
+633b6d373009416f214edcf456208580 *tests/data/lavf/lavf.mxf_opatom_audio
 102969 tests/data/lavf/lavf.mxf_opatom_audio
 tests/data/lavf/lavf.mxf_opatom_audio CRC=0xd155c6ff
