diff --git a/lib/tlTimeline/Player.cpp b/lib/tlTimeline/Player.cpp
index 3b52d482..88114bdc 100644
--- a/lib/tlTimeline/Player.cpp
+++ b/lib/tlTimeline/Player.cpp
@@ -198,6 +198,7 @@ namespace tl
                         const auto t0 = std::chrono::steady_clock::now();
 
                         // Get mutex protected values.
+                        std::vector<std::shared_ptr<Timeline> > compare;
                         bool clearRequests = false;
                         bool clearCache = false;
                         {
@@ -205,7 +206,7 @@ namespace tl
                             p.thread.playback = p.mutex.playback;
                             p.thread.currentTime = p.mutex.currentTime;
                             p.thread.inOutRange = p.mutex.inOutRange;
-                            p.thread.compare = p.mutex.compare;
+                            compare = p.mutex.compare;
                             p.thread.compareTime = p.mutex.compareTime;
                             p.thread.ioOptions = p.mutex.ioOptions;
                             p.thread.videoLayer = p.mutex.videoLayer;
@@ -224,6 +225,7 @@ namespace tl
                         {
                             p.clearRequests();
                         }
+                        p.thread.compare = compare;
 
                         // Clear the cache.
                         if (clearCache)
diff --git a/lib/tlTimeline/Player.h b/lib/tlTimeline/Player.h
index 9944ae31..3695dc3a 100644
--- a/lib/tlTimeline/Player.h
+++ b/lib/tlTimeline/Player.h
@@ -98,7 +98,7 @@ namespace tl
             static std::shared_ptr<Player> create(
                 const std::shared_ptr<Timeline>&,
                 const std::shared_ptr<system::Context>&,
-                const PlayerOptions & = PlayerOptions());
+                const PlayerOptions& = PlayerOptions());
 
             //! Get the context.
             const std::weak_ptr<system::Context>& getContext() const;
diff --git a/lib/tlTimeline/PlayerPrivate.cpp b/lib/tlTimeline/PlayerPrivate.cpp
index 79fde7b7..9f962e86 100644
--- a/lib/tlTimeline/PlayerPrivate.cpp
+++ b/lib/tlTimeline/PlayerPrivate.cpp
@@ -298,10 +298,11 @@ namespace tl
                                 if (j == thread.videoDataRequests.end())
                                 {
                                     //std::cout << this << " video request: " << time << std::endl;
-                                    thread.videoDataRequests[time].clear();
+                                    auto& request = thread.videoDataRequests[time];
+                                    request.clear();
                                     io::Options ioOptions2 = thread.ioOptions;
                                     ioOptions2["Layer"] = string::Format("{0}").arg(thread.videoLayer);
-                                    thread.videoDataRequests[time].push_back(timeline->getVideo(time, ioOptions2));
+                                    request.push_back(timeline->getVideo(time, ioOptions2));
                                     for (size_t i = 0; i < thread.compare.size(); ++i)
                                     {
                                         const otime::RationalTime time2 = timeline::getCompareTime(
@@ -313,8 +314,7 @@ namespace tl
                                             arg(i < thread.compareVideoLayers.size() ?
                                                 thread.compareVideoLayers[i] :
                                                 thread.videoLayer);
-                                        thread.videoDataRequests[time].push_back(
-                                            thread.compare[i]->getVideo(time2, ioOptions2));
+                                        request.push_back(thread.compare[i]->getVideo(time2, ioOptions2));
                                     }
                                 }
                             }
@@ -335,10 +335,11 @@ namespace tl
                                 if (j == thread.videoDataRequests.end())
                                 {
                                     //std::cout << this << " video request: " << time << std::endl;
-                                    thread.videoDataRequests[time].clear();
+                                    auto& request = thread.videoDataRequests[time];
+                                    request.clear();
                                     io::Options ioOptions2 = thread.ioOptions;
                                     ioOptions2["Layer"] = string::Format("{0}").arg(thread.videoLayer);
-                                    thread.videoDataRequests[time].push_back(timeline->getVideo(time, ioOptions2));
+                                    request.push_back(timeline->getVideo(time, ioOptions2));
                                     for (size_t i = 0; i < thread.compare.size(); ++i)
                                     {
                                         const otime::RationalTime time2 = timeline::getCompareTime(
@@ -350,8 +351,7 @@ namespace tl
                                             arg(i < thread.compareVideoLayers.size() ?
                                                 thread.compareVideoLayers[i] :
                                                 thread.videoLayer);
-                                        thread.videoDataRequests[time].push_back(
-                                            thread.compare[i]->getVideo(time2, ioOptions2));
+                                        request.push_back(thread.compare[i]->getVideo(time2, ioOptions2));
                                     }
                                 }
                             }
@@ -436,14 +436,15 @@ namespace tl
                 if (ready)
                 {
                     const otime::RationalTime time = videoDataRequestsIt->first;
-                    thread.videoDataCache[time].clear();
+                    auto& videoDataCache = thread.videoDataCache[time];
+                    videoDataCache.clear();
                     for (auto videoDataRequestIt = videoDataRequestsIt->second.begin();
                         videoDataRequestIt != videoDataRequestsIt->second.end();
                         ++videoDataRequestIt)
                     {
-                        auto data = videoDataRequestIt->future.get();
-                        data.time = time;
-                        thread.videoDataCache[data.time].push_back(data);
+                        auto videoData = videoDataRequestIt->future.get();
+                        videoData.time = time;
+                        videoDataCache.push_back(videoData);
                     }
                     videoDataRequestsIt = thread.videoDataRequests.erase(videoDataRequestsIt);
                 }