diff --git a/Source/WebCore/platform/graphics/gstreamer/eme/CDMProxyThunder.cpp b/Source/WebCore/platform/graphics/gstreamer/eme/CDMProxyThunder.cpp
index e6e12e8131d9a..00e75ae0afb6e 100644
--- a/Source/WebCore/platform/graphics/gstreamer/eme/CDMProxyThunder.cpp
+++ b/Source/WebCore/platform/graphics/gstreamer/eme/CDMProxyThunder.cpp
@@ -90,8 +90,7 @@ bool CDMProxyThunder::decrypt(CDMProxyThunder::DecryptionContext& input)
 
     GST_TRACE("decrypting");
     // Decrypt cipher.
-    OpenCDMError errorCode = opencdm_gstreamer_session_decrypt(session->get(), input.dataBuffer, input.subsamplesBuffer, input.numSubsamples,
-        input.ivBuffer, input.keyIDBuffer, 0);
+    OpenCDMError errorCode = opencdm_gstreamer_session_decrypt_buffer(session->get(), input.dataBuffer, input.caps.get());
     if (errorCode) {
         GST_ERROR("decryption failed, error code %X", errorCode);
         return false;
diff --git a/Source/WebCore/platform/graphics/gstreamer/eme/CDMProxyThunder.h b/Source/WebCore/platform/graphics/gstreamer/eme/CDMProxyThunder.h
index ad544364a483b..7c1ff0129ed17 100644
--- a/Source/WebCore/platform/graphics/gstreamer/eme/CDMProxyThunder.h
+++ b/Source/WebCore/platform/graphics/gstreamer/eme/CDMProxyThunder.h
@@ -52,6 +52,7 @@ class CDMProxyThunder final : public CDMProxy, public CanMakeWeakPtr<CDMProxyThu
         GstBuffer* ivBuffer;
         GstBuffer* dataBuffer;
         GstBuffer* subsamplesBuffer;
+        GRefPtr<GstCaps> caps;
         size_t numSubsamples;
         WeakPtr<CDMProxyDecryptionClient> cdmProxyDecryptionClient;
     };
diff --git a/Source/WebCore/platform/graphics/gstreamer/eme/WebKitThunderDecryptorGStreamer.cpp b/Source/WebCore/platform/graphics/gstreamer/eme/WebKitThunderDecryptorGStreamer.cpp
index f8a5e4c2e8a14..cdf18c4743c60 100644
--- a/Source/WebCore/platform/graphics/gstreamer/eme/WebKitThunderDecryptorGStreamer.cpp
+++ b/Source/WebCore/platform/graphics/gstreamer/eme/WebKitThunderDecryptorGStreamer.cpp
@@ -155,6 +155,13 @@ static bool decrypt(WebKitMediaCommonEncryptionDecrypt* decryptor, GstBuffer* iv
         return false;
     }
 
+    GRefPtr<GstPad> sinkpad = adoptGRef(gst_element_get_static_pad(reinterpret_cast<GstElement*>(self), "sink"));
+    GRefPtr<GstCaps> caps = adoptGRef(gst_pad_get_current_caps(sinkpad.get()));
+
+    GstStructure *capstruct = gst_caps_get_structure(caps.get(), 0);
+    const gchar* capsinfo = gst_structure_get_string(capstruct, "original-media-type");
+    GST_DEBUG_OBJECT(self, "CAPS %p - Stream Type = %s", caps.get(), capsinfo);
+
     CDMProxyThunder::DecryptionContext context = { };
     context.keyIDBuffer = keyIDBuffer;
     context.ivBuffer = ivBuffer;
@@ -162,6 +169,7 @@ static bool decrypt(WebKitMediaCommonEncryptionDecrypt* decryptor, GstBuffer* iv
     context.numSubsamples = subsampleCount;
     context.subsamplesBuffer = subsampleCount ? subsamplesBuffer : nullptr;
     context.cdmProxyDecryptionClient = webKitMediaCommonEncryptionDecryptGetCDMProxyDecryptionClient(decryptor);
+    context.caps = caps;
     bool result = priv->cdmProxy->decrypt(context);
 
     return result;