diff --git a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Sniffer.java b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Sniffer.java
index c661e7be07..f8078353d2 100644
--- a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Sniffer.java
+++ b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Sniffer.java
@@ -57,6 +57,8 @@ import java.io.IOException;
         0x71742020, // qt[space][space], Apple QuickTime
         0x4d534e56, // MSNV, Sony PSP
         0x64627931, // dby1, Dolby Vision
+        0x69736d6c, // isml
+        0x70696666, // piff
       };
 
   /**