diff --git a/libraries/test_data/src/test/assets/muxerdumps/mp4_with_0_orientation.mp4.dump b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_0_orientation.mp4.dump
new file mode 100644
index 0000000000..4c7c520cc0
--- /dev/null
+++ b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_0_orientation.mp4.dump
@@ -0,0 +1,26 @@
+seekMap:
+  isSeekable = true
+  duration = 0
+  getPosition(0) = [[timeUs=0, position=44]]
+  getPosition(1) = [[timeUs=0, position=44]]
+  getPosition(0) = [[timeUs=0, position=44]]
+  getPosition(0) = [[timeUs=0, position=44]]
+numberOfTracks = 1
+track 0:
+  total output bytes = 55
+  sample count = 1
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.9B2BF3
+    maxInputSize = 85
+    width = 12
+    height = 10
+    initializationData:
+      data = length 24, hash 7F12E259
+      data = length 5, hash 1B4D906
+  sample 0:
+    time = 0
+    flags = 536870913
+    data = length 55, hash A481CEF4
+tracksEnded = true
diff --git a/libraries/test_data/src/test/assets/muxerdumps/mp4_with_90_orientation.mp4.dump b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_90_orientation.mp4.dump
new file mode 100644
index 0000000000..2a5ad0b955
--- /dev/null
+++ b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_90_orientation.mp4.dump
@@ -0,0 +1,27 @@
+seekMap:
+  isSeekable = true
+  duration = 0
+  getPosition(0) = [[timeUs=0, position=44]]
+  getPosition(1) = [[timeUs=0, position=44]]
+  getPosition(0) = [[timeUs=0, position=44]]
+  getPosition(0) = [[timeUs=0, position=44]]
+numberOfTracks = 1
+track 0:
+  total output bytes = 55
+  sample count = 1
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.9B2BF3
+    maxInputSize = 85
+    width = 12
+    height = 10
+    rotationDegrees = 90
+    initializationData:
+      data = length 24, hash 7F12E259
+      data = length 5, hash 1B4D906
+  sample 0:
+    time = 0
+    flags = 536870913
+    data = length 55, hash A481CEF4
+tracksEnded = true
diff --git a/libraries/test_data/src/test/assets/muxerdumps/mp4_with_float_metadata.mp4.dump b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_float_metadata.mp4.dump
new file mode 100644
index 0000000000..55705bb18d
--- /dev/null
+++ b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_float_metadata.mp4.dump
@@ -0,0 +1,40 @@
+ftyp (28 bytes):
+  Data = length 20, hash EF896440
+mdat (71 bytes):
+  Data = length 55, hash 6B19F4A7
+moov (764 bytes):
+  mvhd (108 bytes):
+    Data = length 100, hash A5ADE288
+  meta (114 bytes):
+    hdlr (33 bytes):
+      Data = length 25, hash C39D0F5B
+    keys (37 bytes):
+      Data = length 29, hash 45F2DCDF
+    ilst (36 bytes):
+      Data = length 28, hash 2BFD5C32
+  trak (534 bytes):
+    tkhd (92 bytes):
+      Data = length 84, hash C25E979A
+    mdia (434 bytes):
+      mdhd (32 bytes):
+        Data = length 24, hash 50217AD
+      hdlr (44 bytes):
+        Data = length 36, hash A0852FF2
+      minf (350 bytes):
+        vmhd (20 bytes):
+          Data = length 12, hash EE830681
+        dinf (36 bytes):
+          Data = length 28, hash D535436B
+        stbl (286 bytes):
+          stsd (158 bytes):
+            Data = length 150, hash 2AD095C5
+          stts (24 bytes):
+            Data = length 16, hash E4FC6483
+          stsz (24 bytes):
+            Data = length 16, hash 50B7F5B9
+          stsc (28 bytes):
+            Data = length 20, hash 8F6E8285
+          co64 (24 bytes):
+            Data = length 16, hash E4EE4D2E
+          stss (20 bytes):
+            Data = length 12, hash EE911E03
diff --git a/libraries/test_data/src/test/assets/muxerdumps/mp4_with_frame_rate.mp4.dump b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_frame_rate.mp4.dump
new file mode 100644
index 0000000000..c87b866d6f
--- /dev/null
+++ b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_frame_rate.mp4.dump
@@ -0,0 +1,40 @@
+ftyp (28 bytes):
+  Data = length 20, hash EF896440
+mdat (71 bytes):
+  Data = length 55, hash 6B19F4A7
+moov (774 bytes):
+  mvhd (108 bytes):
+    Data = length 100, hash A5ADE288
+  meta (124 bytes):
+    hdlr (33 bytes):
+      Data = length 25, hash C39D0F5B
+    keys (47 bytes):
+      Data = length 39, hash 1747DBD0
+    ilst (36 bytes):
+      Data = length 28, hash 2BFD1C61
+  trak (534 bytes):
+    tkhd (92 bytes):
+      Data = length 84, hash C25E979A
+    mdia (434 bytes):
+      mdhd (32 bytes):
+        Data = length 24, hash 50217AD
+      hdlr (44 bytes):
+        Data = length 36, hash A0852FF2
+      minf (350 bytes):
+        vmhd (20 bytes):
+          Data = length 12, hash EE830681
+        dinf (36 bytes):
+          Data = length 28, hash D535436B
+        stbl (286 bytes):
+          stsd (158 bytes):
+            Data = length 150, hash 2AD095C5
+          stts (24 bytes):
+            Data = length 16, hash E4FC6483
+          stsz (24 bytes):
+            Data = length 16, hash 50B7F5B9
+          stsc (28 bytes):
+            Data = length 20, hash 8F6E8285
+          co64 (24 bytes):
+            Data = length 16, hash E4EE4D2E
+          stss (20 bytes):
+            Data = length 12, hash EE911E03
diff --git a/libraries/test_data/src/test/assets/muxerdumps/mp4_with_location.mp4.dump b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_location.mp4.dump
new file mode 100644
index 0000000000..de34b09a2d
--- /dev/null
+++ b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_location.mp4.dump
@@ -0,0 +1,35 @@
+ftyp (28 bytes):
+  Data = length 20, hash EF896440
+mdat (71 bytes):
+  Data = length 55, hash 6B19F4A7
+moov (688 bytes):
+  mvhd (108 bytes):
+    Data = length 100, hash A5ADE288
+  udta (38 bytes):
+    Data = length 30, hash 25372BB9
+  trak (534 bytes):
+    tkhd (92 bytes):
+      Data = length 84, hash C25E979A
+    mdia (434 bytes):
+      mdhd (32 bytes):
+        Data = length 24, hash 50217AD
+      hdlr (44 bytes):
+        Data = length 36, hash A0852FF2
+      minf (350 bytes):
+        vmhd (20 bytes):
+          Data = length 12, hash EE830681
+        dinf (36 bytes):
+          Data = length 28, hash D535436B
+        stbl (286 bytes):
+          stsd (158 bytes):
+            Data = length 150, hash 2AD095C5
+          stts (24 bytes):
+            Data = length 16, hash E4FC6483
+          stsz (24 bytes):
+            Data = length 16, hash 50B7F5B9
+          stsc (28 bytes):
+            Data = length 20, hash 8F6E8285
+          co64 (24 bytes):
+            Data = length 16, hash E4EE4D2E
+          stss (20 bytes):
+            Data = length 12, hash EE911E03
diff --git a/libraries/test_data/src/test/assets/muxerdumps/mp4_with_null_location.mp4.dump b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_null_location.mp4.dump
new file mode 100644
index 0000000000..e4f7d0d0fc
--- /dev/null
+++ b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_null_location.mp4.dump
@@ -0,0 +1,33 @@
+ftyp (28 bytes):
+  Data = length 20, hash EF896440
+mdat (71 bytes):
+  Data = length 55, hash 6B19F4A7
+moov (650 bytes):
+  mvhd (108 bytes):
+    Data = length 100, hash A5ADE288
+  trak (534 bytes):
+    tkhd (92 bytes):
+      Data = length 84, hash C25E979A
+    mdia (434 bytes):
+      mdhd (32 bytes):
+        Data = length 24, hash 50217AD
+      hdlr (44 bytes):
+        Data = length 36, hash A0852FF2
+      minf (350 bytes):
+        vmhd (20 bytes):
+          Data = length 12, hash EE830681
+        dinf (36 bytes):
+          Data = length 28, hash D535436B
+        stbl (286 bytes):
+          stsd (158 bytes):
+            Data = length 150, hash 2AD095C5
+          stts (24 bytes):
+            Data = length 16, hash E4FC6483
+          stsz (24 bytes):
+            Data = length 16, hash 50B7F5B9
+          stsc (28 bytes):
+            Data = length 20, hash 8F6E8285
+          co64 (24 bytes):
+            Data = length 16, hash E4EE4D2E
+          stss (20 bytes):
+            Data = length 12, hash EE911E03
diff --git a/libraries/test_data/src/test/assets/muxerdumps/mp4_with_string_metadata.mp4.dump b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_string_metadata.mp4.dump
new file mode 100644
index 0000000000..fd86685c6e
--- /dev/null
+++ b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_string_metadata.mp4.dump
@@ -0,0 +1,40 @@
+ftyp (28 bytes):
+  Data = length 20, hash EF896440
+mdat (71 bytes):
+  Data = length 55, hash 6B19F4A7
+moov (778 bytes):
+  mvhd (108 bytes):
+    Data = length 100, hash A5ADE288
+  meta (128 bytes):
+    hdlr (33 bytes):
+      Data = length 25, hash C39D0F5B
+    keys (37 bytes):
+      Data = length 29, hash 45F2DCDF
+    ilst (50 bytes):
+      Data = length 42, hash F4AA183B
+  trak (534 bytes):
+    tkhd (92 bytes):
+      Data = length 84, hash C25E979A
+    mdia (434 bytes):
+      mdhd (32 bytes):
+        Data = length 24, hash 50217AD
+      hdlr (44 bytes):
+        Data = length 36, hash A0852FF2
+      minf (350 bytes):
+        vmhd (20 bytes):
+          Data = length 12, hash EE830681
+        dinf (36 bytes):
+          Data = length 28, hash D535436B
+        stbl (286 bytes):
+          stsd (158 bytes):
+            Data = length 150, hash 2AD095C5
+          stts (24 bytes):
+            Data = length 16, hash E4FC6483
+          stsz (24 bytes):
+            Data = length 16, hash 50B7F5B9
+          stsc (28 bytes):
+            Data = length 20, hash 8F6E8285
+          co64 (24 bytes):
+            Data = length 16, hash E4EE4D2E
+          stss (20 bytes):
+            Data = length 12, hash EE911E03
diff --git a/libraries/test_data/src/test/assets/muxerdumps/mp4_with_xmp.mp4.dump b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_xmp.mp4.dump
new file mode 100644
index 0000000000..a467f0d716
--- /dev/null
+++ b/libraries/test_data/src/test/assets/muxerdumps/mp4_with_xmp.mp4.dump
@@ -0,0 +1,35 @@
+ftyp (28 bytes):
+  Data = length 20, hash EF896440
+mdat (71 bytes):
+  Data = length 55, hash 6B19F4A7
+moov (650 bytes):
+  mvhd (108 bytes):
+    Data = length 100, hash A5ADE288
+  trak (534 bytes):
+    tkhd (92 bytes):
+      Data = length 84, hash C25E979A
+    mdia (434 bytes):
+      mdhd (32 bytes):
+        Data = length 24, hash 50217AD
+      hdlr (44 bytes):
+        Data = length 36, hash A0852FF2
+      minf (350 bytes):
+        vmhd (20 bytes):
+          Data = length 12, hash EE830681
+        dinf (36 bytes):
+          Data = length 28, hash D535436B
+        stbl (286 bytes):
+          stsd (158 bytes):
+            Data = length 150, hash 2AD095C5
+          stts (24 bytes):
+            Data = length 16, hash E4FC6483
+          stsz (24 bytes):
+            Data = length 16, hash 50B7F5B9
+          stsc (28 bytes):
+            Data = length 20, hash 8F6E8285
+          co64 (24 bytes):
+            Data = length 16, hash E4EE4D2E
+          stss (20 bytes):
+            Data = length 12, hash EE911E03
+uuid (2853 bytes):
+  Data = length 2845, hash 52AF0F9D