diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
index 7a2f98d7508a3..52da37e3c5807 100644
--- a/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
+++ b/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
@@ -969,11 +969,12 @@ void AppendPipeline::abort()
         }
         // Drain samples before source buffer state is reset
         if (m_appendState == AppendState::Sampling) {
-            GRefPtr<GstPad> appsrcPad = adoptGRef(gst_element_get_static_pad(m_appsrc.get(), "src"));
+            GST_DEBUG("ARRISEOS-43952");
+/*            GRefPtr<GstPad> appsrcPad = adoptGRef(gst_element_get_static_pad(m_appsrc.get(), "src"));
             if (appsrcPad) {
                 GRefPtr<GstQuery> query = adoptGRef(gst_query_new_drain());
                 gst_pad_peer_query(appsrcPad.get(), query.get());
-            }
+            }*/
             drainBusIfNeeded();
         }
     }
diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
index 9212cc2c064a3..c5ac8cca918dc 100644
--- a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
+++ b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
@@ -89,6 +89,15 @@
 #define MEDIA_MAX_FRAMERATE 60.0f
 #endif
 
+#if PLATFORM(EOS)
+   #define H264_MAX_SIZE 1920.0f
+#elif PLATFORM(EOS2008C)
+   #define H264_MAX_SIZE 3840.0f
+#elif PLATFORM(APOLLO)
+   #define H264_MAX_SIZE 4096.0f
+#else
+   #define H264_MAX_SIZE 7680.0f
+#endif
 static const char* dumpReadyState(WebCore::MediaPlayer::ReadyState readyState)
 {
     switch (readyState) {
@@ -1077,6 +1086,16 @@ bool MediaPlayerPrivateGStreamerMSE::supportsAllCodecs(const Vector<String>& cod
     return true;
 }
 
+bool MediaPlayerPrivateGStreamerMSE::isAnyCodecH264AndExceedSupportedSize(const Vector<String>& codecs, float width, float height)
+{
+    for (String codec : codecs) {
+        if(codec.startsWith("avc") && (width > H264_MAX_SIZE || height > H264_MAX_SIZE)) {
+            return true;
+        }
+    }
+    return false;
+}
+
 FloatSize MediaPlayerPrivateGStreamerMSE::naturalSize() const
 {
     if (!hasVideo())
@@ -1120,6 +1139,9 @@ MediaPlayer::SupportsType MediaPlayerPrivateGStreamerMSE::supportsType(const Med
     if (width > MEDIA_MAX_WIDTH || height > MEDIA_MAX_HEIGHT)
         return result;
 
+    if(isAnyCodecH264AndExceedSupportedSize(parameters.type.codecs(), width, height))
+        return result;
+
     float framerate = parameters.type.parameter("framerate"_s).toFloat(&ok);
     if (ok && framerate > MEDIA_MAX_FRAMERATE)
         return result;
diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h
index ba4b3a6991db2..ec2fa882b236b 100644
--- a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h
+++ b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h
@@ -88,6 +88,7 @@ class MediaPlayerPrivateGStreamerMSE : public MediaPlayerPrivateGStreamer {
 
     static bool supportsCodec(String codec);
     static bool supportsAllCodecs(const Vector<String>& codecs);
+    static bool isAnyCodecH264AndExceedSupportedSize(const Vector<String>& codecs, float width, float height);
 
 #if ENABLE(ENCRYPTED_MEDIA)
     void dispatchDecryptionStructure(GUniquePtr<GstStructure>&&) final;
diff --git a/Source/cmake/OptionsWPE.cmake b/Source/cmake/OptionsWPE.cmake
index 94917879a6c92..d1070d08bcbdc 100644
--- a/Source/cmake/OptionsWPE.cmake
+++ b/Source/cmake/OptionsWPE.cmake
@@ -178,6 +178,18 @@ if (ENABLE_CBCS)
     add_definitions(-DENABLE_CBCS=1)
 endif()
 
+if (PLATFORM_EOS)
+    add_definitions(-DWTF_PLATFORM_EOS=1)
+endif()
+
+if (PLATFORM_EOS2008C)
+    add_definitions(-DWTF_PLATFORM_EOS2008C=1)
+endif()
+
+if (PLATFORM_APOLLO)
+    add_definitions(-DWTF_PLATFORM_APOLLO=1)
+endif()
+
 add_definitions(-DBUILDING_WPE__=1)
 add_definitions(-DGETTEXT_PACKAGE="WPE")
 add_definitions(-DJSC_GLIB_API_ENABLED)