diff --git a/lib/tlBakeApp/App.cpp b/lib/tlBakeApp/App.cpp
index 2e1c9ce94..93e8209a6 100644
--- a/lib/tlBakeApp/App.cpp
+++ b/lib/tlBakeApp/App.cpp
@@ -364,7 +364,7 @@ namespace tl
             _render->begin(_renderSize);
             _render->setOCIOOptions(_options.ocioOptions);
             _render->setLUTOptions(_options.lutOptions);
-            const auto videoData = _timeline->getVideo(_inputTime).get();
+            const auto videoData = _timeline->getVideo(_inputTime).future.get();
             _render->drawVideo(
                 { videoData },
                 { math::Box2i(0, 0, _renderSize.w, _renderSize.h) });
diff --git a/lib/tlTimeline/Player.cpp b/lib/tlTimeline/Player.cpp
index dd4418341..df6ae7cb5 100644
--- a/lib/tlTimeline/Player.cpp
+++ b/lib/tlTimeline/Player.cpp
@@ -220,10 +220,23 @@ namespace tl
                         // Clear requests.
                         if (clearRequests)
                         {
-                            p.timeline->cancelRequests();
-                            for (const auto& i : p.thread.compare)
+                            std::vector<std::vector<uint64_t> > ids;
+                            ids.resize(1 + p.thread.compare.size());
+                            for (const auto& i : p.thread.videoDataRequests)
                             {
-                                i->cancelRequests();
+                                for (size_t j = 0; j < i.second.size() && j < ids.size(); ++j)
+                                {
+                                    ids[j].push_back(i.second[j].id);
+                                }
+                            }
+                            for (const auto& i : p.thread.audioDataRequests)
+                            {
+                                ids[0].push_back(i.second.id);
+                            }
+                            p.timeline->cancelRequests(ids[0]);
+                            for (size_t i = 0; i < p.thread.compare.size(); ++i)
+                            {
+                                p.thread.compare[i]->cancelRequests(ids[i + 1]);
                             }
                             p.thread.videoDataRequests.clear();
                             p.thread.audioDataRequests.clear();
diff --git a/lib/tlTimeline/PlayerPrivate.cpp b/lib/tlTimeline/PlayerPrivate.cpp
index 5c2e390ea..4d3092786 100644
--- a/lib/tlTimeline/PlayerPrivate.cpp
+++ b/lib/tlTimeline/PlayerPrivate.cpp
@@ -386,8 +386,8 @@ namespace tl
                     videoDataRequestIt != videoDataRequestsIt->second.end();
                     ++videoDataRequestIt)
                 {
-                    ready &= videoDataRequestIt->valid() &&
-                        videoDataRequestIt->wait_for(std::chrono::seconds(0)) == std::future_status::ready;
+                    ready &= videoDataRequestIt->future.valid() &&
+                        videoDataRequestIt->future.wait_for(std::chrono::seconds(0)) == std::future_status::ready;
                 }
                 if (ready)
                 {
@@ -397,7 +397,7 @@ namespace tl
                         videoDataRequestIt != videoDataRequestsIt->second.end();
                         ++videoDataRequestIt)
                     {
-                        auto data = videoDataRequestIt->get();
+                        auto data = videoDataRequestIt->future.get();
                         data.time = time;
                         thread.videoDataCache[data.time].push_back(data);
                     }
@@ -413,10 +413,10 @@ namespace tl
             auto audioDataRequestsIt = thread.audioDataRequests.begin();
             while (audioDataRequestsIt != thread.audioDataRequests.end())
             {
-                if (audioDataRequestsIt->second.valid() &&
-                    audioDataRequestsIt->second.wait_for(std::chrono::seconds(0)) == std::future_status::ready)
+                if (audioDataRequestsIt->second.future.valid() &&
+                    audioDataRequestsIt->second.future.wait_for(std::chrono::seconds(0)) == std::future_status::ready)
                 {
-                    auto audioData = audioDataRequestsIt->second.get();
+                    auto audioData = audioDataRequestsIt->second.future.get();
                     audioData.seconds = audioDataRequestsIt->first;
                     {
                         std::unique_lock<std::mutex> lock(audioMutex.mutex);
diff --git a/lib/tlTimeline/PlayerPrivate.h b/lib/tlTimeline/PlayerPrivate.h
index 4a16f98e4..85153909d 100644
--- a/lib/tlTimeline/PlayerPrivate.h
+++ b/lib/tlTimeline/PlayerPrivate.h
@@ -118,12 +118,12 @@ namespace tl
                 CacheDirection cacheDirection = CacheDirection::Forward;
                 PlayerCacheOptions cacheOptions;
 
-                std::map<otime::RationalTime, std::vector<std::future<VideoData> > > videoDataRequests;
+                std::map<otime::RationalTime, std::vector<VideoRequest> > videoDataRequests;
                 std::map<otime::RationalTime, std::vector<VideoData> > videoDataCache;
 #if defined(TLRENDER_AUDIO)
                 std::unique_ptr<RtAudio> rtAudio;
 #endif // TLRENDER_AUDIO
-                std::map<int64_t, std::future<AudioData> > audioDataRequests;
+                std::map<int64_t, AudioRequest> audioDataRequests;
                 std::chrono::steady_clock::time_point cacheTimer;
                 std::chrono::steady_clock::time_point logTimer;
                 std::atomic<bool> running;
diff --git a/lib/tlTimeline/Timeline.cpp b/lib/tlTimeline/Timeline.cpp
index dacf67f6d..1591a49a7 100644
--- a/lib/tlTimeline/Timeline.cpp
+++ b/lib/tlTimeline/Timeline.cpp
@@ -251,15 +251,19 @@ namespace tl
             return _p->ioInfo;
         }
 
-        std::future<VideoData> Timeline::getVideo(
+        VideoRequest Timeline::getVideo(
             const otime::RationalTime& time,
             const io::Options& options)
         {
             TLRENDER_P();
+            (p.requestId)++;
             auto request = std::make_shared<Private::VideoRequest>();
+            request->id = p.requestId;
             request->time = time;
             request->options = options;
-            auto future = request->promise.get_future();
+            VideoRequest out;
+            out.id = p.requestId;
+            out.future = request->promise.get_future();
             bool valid = false;
             {
                 std::unique_lock<std::mutex> lock(p.mutex.mutex);
@@ -277,18 +281,22 @@ namespace tl
             {
                 request->promise.set_value(VideoData());
             }
-            return future;
+            return out;
         }
 
-        std::future<AudioData> Timeline::getAudio(
+        AudioRequest Timeline::getAudio(
             double seconds,
             const io::Options& options)
         {
             TLRENDER_P();
+            (p.requestId)++;
             auto request = std::make_shared<Private::AudioRequest>();
+            request->id = p.requestId;
             request->seconds = seconds;
             request->options = options;
-            auto future = request->promise.get_future();
+            AudioRequest out;
+            out.id = p.requestId;
+            out.future = request->promise.get_future();
             bool valid = false;
             {
                 std::unique_lock<std::mutex> lock(p.mutex.mutex);
@@ -306,26 +314,42 @@ namespace tl
             {
                 request->promise.set_value(AudioData());
             }
-            return future;
+            return out;
         }
 
-        void Timeline::cancelRequests()
+        void Timeline::cancelRequests(const std::vector<uint64_t>& ids)
         {
             TLRENDER_P();
-            std::list<std::shared_ptr<Private::VideoRequest> > videoRequests;
-            std::list<std::shared_ptr<Private::AudioRequest> > audioRequests;
-            {
-                std::unique_lock<std::mutex> lock(p.mutex.mutex);
-                videoRequests = std::move(p.mutex.videoRequests);
-                audioRequests = std::move(p.mutex.audioRequests);
-            }
-            for (auto& request : videoRequests)
+            std::unique_lock<std::mutex> lock(p.mutex.mutex);
             {
-                request->promise.set_value(VideoData());
+                auto i = p.mutex.videoRequests.begin();
+                while (i != p.mutex.videoRequests.end())
+                {
+                    const auto j = std::find(ids.begin(), ids.end(), (*i)->id);
+                    if (j != ids.end())
+                    {
+                        i = p.mutex.videoRequests.erase(i);
+                    }
+                    else
+                    {
+                        ++i;
+                    }
+                }
             }
-            for (auto& request : audioRequests)
             {
-                request->promise.set_value(AudioData());
+                auto i = p.mutex.audioRequests.begin();
+                while (i != p.mutex.audioRequests.end())
+                {
+                    const auto j = std::find(ids.begin(), ids.end(), (*i)->id);
+                    if (j != ids.end())
+                    {
+                        i = p.mutex.audioRequests.erase(i);
+                    }
+                    else
+                    {
+                        ++i;
+                    }
+                }
             }
         }
 
diff --git a/lib/tlTimeline/Timeline.h b/lib/tlTimeline/Timeline.h
index 918b33791..3dc977f46 100644
--- a/lib/tlTimeline/Timeline.h
+++ b/lib/tlTimeline/Timeline.h
@@ -69,6 +69,20 @@ namespace tl
             const std::shared_ptr<system::Context>&,
             const Options& = Options());
 
+        //! Video request.
+        struct VideoRequest
+        {
+            uint64_t id = 0;
+            std::future<VideoData> future;
+        };
+
+        //! Audio request.
+        struct AudioRequest
+        {
+            uint64_t id = 0;
+            std::future<AudioData> future;
+        };
+
         //! Timeline.
         class Timeline : public std::enable_shared_from_this<Timeline>
         {
@@ -159,19 +173,17 @@ namespace tl
             ///@{
 
             //! Get video data.
-            std::future<VideoData> getVideo(
+            VideoRequest getVideo(
                 const otime::RationalTime&,
                 const io::Options& = io::Options());
 
             //! Get audio data.
-            std::future<AudioData> getAudio(
+            AudioRequest getAudio(
                 double seconds,
                 const io::Options& = io::Options());
 
             //! Cancel requests.
-            //!
-            //! \todo Change this to cancel only specific requests.
-            void cancelRequests();
+            void cancelRequests(const std::vector<uint64_t>&);
 
             ///@}
 
diff --git a/lib/tlTimeline/TimelinePrivate.h b/lib/tlTimeline/TimelinePrivate.h
index 1ee3353f7..bec70dd85 100644
--- a/lib/tlTimeline/TimelinePrivate.h
+++ b/lib/tlTimeline/TimelinePrivate.h
@@ -58,6 +58,7 @@ namespace tl
             memory::LRUCache<std::string, std::shared_ptr<io::IRead> > readCache;
             otime::TimeRange timeRange = time::invalidTimeRange;
             io::Info ioInfo;
+            uint64_t requestId = 0;
 
             struct VideoLayerData
             {
@@ -74,6 +75,7 @@ namespace tl
                 VideoRequest() {};
                 VideoRequest(VideoRequest&&) = default;
 
+                uint64_t id = 0;
                 otime::RationalTime time = time::invalidTime;
                 io::Options options;
                 std::promise<VideoData> promise;
@@ -95,6 +97,7 @@ namespace tl
                 AudioRequest() {};
                 AudioRequest(AudioRequest&&) = default;
 
+                uint64_t id = 0;
                 double seconds = -1.0;
                 io::Options options;
                 std::promise<AudioData> promise;
diff --git a/tests/tlTimelineTest/TimelineTest.cpp b/tests/tlTimelineTest/TimelineTest.cpp
index 9d5788dac..8c7ff6754 100644
--- a/tests/tlTimelineTest/TimelineTest.cpp
+++ b/tests/tlTimelineTest/TimelineTest.cpp
@@ -134,27 +134,27 @@ namespace tl
             // Get video from the timeline.
             const otime::TimeRange& timeRange = timeline->getTimeRange();
             std::vector<timeline::VideoData> videoData;
-            std::vector<std::future<timeline::VideoData> > videoFutures;
+            std::vector<timeline::VideoRequest> videoRequests;
             for (size_t i = 0; i < static_cast<size_t>(timeRange.duration().value()); ++i)
             {
-                videoFutures.push_back(timeline->getVideo(otime::RationalTime(i, 24.0)));
+                videoRequests.push_back(timeline->getVideo(otime::RationalTime(i, 24.0)));
             }
             io::Options ioOptions;
             ioOptions["Layer"] = "1";
             for (size_t i = 0; i < static_cast<size_t>(timeRange.duration().value()); ++i)
             {
-                videoFutures.push_back(timeline->getVideo(otime::RationalTime(i, 24.0), ioOptions));
+                videoRequests.push_back(timeline->getVideo(otime::RationalTime(i, 24.0), ioOptions));
             }
             while (videoData.size() < static_cast<size_t>(timeRange.duration().value()) * 2)
             {
-                auto i = videoFutures.begin();
-                while (i != videoFutures.end())
+                auto i = videoRequests.begin();
+                while (i != videoRequests.end())
                 {
-                    if (i->valid() &&
-                        i->wait_for(std::chrono::seconds(0)) == std::future_status::ready)
+                    if (i->future.valid() &&
+                        i->future.wait_for(std::chrono::seconds(0)) == std::future_status::ready)
                     {
-                        videoData.push_back(i->get());
-                        i = videoFutures.erase(i);
+                        videoData.push_back(i->future.get());
+                        i = videoRequests.erase(i);
                     }
                     else
                     {
@@ -162,25 +162,25 @@ namespace tl
                     }
                 }
             }
-            TLRENDER_ASSERT(videoFutures.empty());
+            TLRENDER_ASSERT(videoRequests.empty());
 
             // Get audio from the timeline.
             std::vector<timeline::AudioData> audioData;
-            std::vector<std::future<timeline::AudioData> > audioFutures;
+            std::vector<timeline::AudioRequest> audioRequests;
             for (size_t i = 0; i < static_cast<size_t>(timeRange.duration().rescaled_to(1.0).value()); ++i)
             {
-                audioFutures.push_back(timeline->getAudio(i));
+                audioRequests.push_back(timeline->getAudio(i));
             }
             while (audioData.size() < static_cast<size_t>(timeRange.duration().rescaled_to(1.0).value()))
             {
-                auto i = audioFutures.begin();
-                while (i != audioFutures.end())
+                auto i = audioRequests.begin();
+                while (i != audioRequests.end())
                 {
-                    if (i->valid() &&
-                        i->wait_for(std::chrono::seconds(0)) == std::future_status::ready)
+                    if (i->future.valid() &&
+                        i->future.wait_for(std::chrono::seconds(0)) == std::future_status::ready)
                     {
-                        audioData.push_back(i->get());
-                        i = audioFutures.erase(i);
+                        audioData.push_back(i->future.get());
+                        i = audioRequests.erase(i);
                     }
                     else
                     {
@@ -188,26 +188,35 @@ namespace tl
                     }
                 }
             }
-            TLRENDER_ASSERT(audioFutures.empty());
+            TLRENDER_ASSERT(audioRequests.empty());
 
             // Cancel requests.
             videoData.clear();
-            videoFutures.clear();
+            videoRequests.clear();
             audioData.clear();
-            audioFutures.clear();
+            audioRequests.clear();
             for (size_t i = 0; i < static_cast<size_t>(timeRange.duration().value()); ++i)
             {
-                videoFutures.push_back(timeline->getVideo(otime::RationalTime(i, 24.0)));
+                videoRequests.push_back(timeline->getVideo(otime::RationalTime(i, 24.0)));
             }
             for (size_t i = 0; i < static_cast<size_t>(timeRange.duration().value()); ++i)
             {
-                videoFutures.push_back(timeline->getVideo(otime::RationalTime(i, 24.0), ioOptions));
+                videoRequests.push_back(timeline->getVideo(otime::RationalTime(i, 24.0), ioOptions));
             }
             for (size_t i = 0; i < static_cast<size_t>(timeRange.duration().rescaled_to(1.0).value()); ++i)
             {
-                audioFutures.push_back(timeline->getAudio(i));
+                audioRequests.push_back(timeline->getAudio(i));
             }
-            timeline->cancelRequests();
+            std::vector<uint64_t> ids;
+            for (const auto& i : videoRequests)
+            {
+                ids.push_back(i.id);
+            }
+            for (const auto& i : audioRequests)
+            {
+                ids.push_back(i.id);
+            }
+            timeline->cancelRequests(ids);
         }
 
         void TimelineTest::_separateAudio()