1 files changed, 7 insertions, 0 deletions
diff --git a/dom/media/platforms/ffmpeg/FFmpegEncoderModule.cpp b/dom/media/platforms/ffmpeg/FFmpegEncoderModule.cpp
index b6e734268d..cb507a0810 100644
--- a/dom/media/platforms/ffmpeg/FFmpegEncoderModule.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegEncoderModule.cpp
@@ -20,6 +20,13 @@ bool FFmpegEncoderModule<V>::Supports(const EncoderConfig& aConfig) const {
   if (!CanLikelyEncode(aConfig)) {
     return false;
   }
+  // We only support L1T2 and L1T3 ScalabilityMode in VP8 and VP9 encoders via
+  // libvpx for now.
+  if ((aConfig.mScalabilityMode != ScalabilityMode::None)) {
+    if (aConfig.mCodec != CodecType::VP8 && aConfig.mCodec != CodecType::VP9) {
+      return false;
+    }
+  }
   return SupportsCodec(aConfig.mCodec) != AV_CODEC_ID_NONE;
 }