--- a/dom/media/mediasource/TrackBuffersManager.cpp
+++ b/dom/media/mediasource/TrackBuffersManager.cpp
@@ -95,17 +95,17 @@ TrackBuffersManager::TrackBuffersManager
   , mParser(ContainerParser::CreateForMIMEType(aType))
   , mProcessedInput(0)
   , mTaskQueue(aParentDecoder->GetDemuxer()->GetTaskQueue())
   , mParentDecoder(new nsMainThreadPtrHolder<MediaSourceDecoder>(aParentDecoder, false /* strict */))
   , mEnded(false)
   , mVideoEvictionThreshold(Preferences::GetUint("media.mediasource.eviction_threshold.video",
                                                  100 * 1024 * 1024))
   , mAudioEvictionThreshold(Preferences::GetUint("media.mediasource.eviction_threshold.audio",
-                                                 12 * 1024 * 1024))
+                                                 20 * 1024 * 1024))
   , mEvictionState(EvictionState::NO_EVICTION_NEEDED)
   , mMonitor("TrackBuffersManager")
 {
   MOZ_ASSERT(NS_IsMainThread(), "Must be instanciated on the main thread");
 }
 
 TrackBuffersManager::~TrackBuffersManager()
 {