diff --git a/packager/media/base/container_names.cc b/packager/media/base/container_names.cc
index a07a026a26..78d028c8ac 100644
--- a/packager/media/base/container_names.cc
+++ b/packager/media/base/container_names.cc
@@ -1736,11 +1736,14 @@ MediaContainerName DetermineContainerFromFormatName(
     return CONTAINER_EAC3;
   } else if (base::EqualsCaseInsensitiveASCII(format_name, "webm")) {
     return CONTAINER_WEBM;
-  } else if (base::EqualsCaseInsensitiveASCII(format_name, "m4a") ||
-             base::EqualsCaseInsensitiveASCII(format_name, "m4v") ||
+  } else if (base::EqualsCaseInsensitiveASCII(format_name, "cmfa") ||
+             base::EqualsCaseInsensitiveASCII(format_name, "cmft") ||
+             base::EqualsCaseInsensitiveASCII(format_name, "cmfv") ||
+             base::EqualsCaseInsensitiveASCII(format_name, "m4a") ||
              base::EqualsCaseInsensitiveASCII(format_name, "m4s") ||
-             base::EqualsCaseInsensitiveASCII(format_name, "mp4") ||
-             base::EqualsCaseInsensitiveASCII(format_name, "mov")) {
+             base::EqualsCaseInsensitiveASCII(format_name, "m4v") ||
+             base::EqualsCaseInsensitiveASCII(format_name, "mov") ||
+             base::EqualsCaseInsensitiveASCII(format_name, "mp4")) {
     return CONTAINER_MOV;
   } else if (base::EqualsCaseInsensitiveASCII(format_name, "ts") ||
              base::EqualsCaseInsensitiveASCII(format_name, "mpeg2ts")) {
diff --git a/packager/media/base/container_names_unittest.cc b/packager/media/base/container_names_unittest.cc
index f4d065fda5..a9abb7516b 100644
--- a/packager/media/base/container_names_unittest.cc
+++ b/packager/media/base/container_names_unittest.cc
@@ -92,6 +92,9 @@ TEST(ContainerNamesTest, FromFormatName) {
   EXPECT_EQ(CONTAINER_MOV, DetermineContainerFromFormatName("mov"));
   EXPECT_EQ(CONTAINER_MOV, DetermineContainerFromFormatName("mp4"));
   EXPECT_EQ(CONTAINER_MOV, DetermineContainerFromFormatName("Mp4"));
+  EXPECT_EQ(CONTAINER_MOV, DetermineContainerFromFormatName("cmfa"));
+  EXPECT_EQ(CONTAINER_MOV, DetermineContainerFromFormatName("cmft"));
+  EXPECT_EQ(CONTAINER_MOV, DetermineContainerFromFormatName("cmfv"));
   EXPECT_EQ(CONTAINER_MPEG2TS, DetermineContainerFromFormatName("ts"));
   EXPECT_EQ(CONTAINER_MPEG2TS, DetermineContainerFromFormatName("mpeg2ts"));
   EXPECT_EQ(CONTAINER_UNKNOWN, DetermineContainerFromFormatName("cat"));