fix initialization of m_next_frame_time

Author: jw098

SerialPrograms/Source/CommonFramework/Recording/StreamHistoryTracker_SaveFrames.cpp

@@ -216,6 +216,7 @@ StreamHistoryTracker::StreamHistoryTracker(
     , m_has_video(has_video)
     , m_target_fps(get_target_fps())
     , m_frame_interval(1000000 / m_target_fps)
+    , m_next_frame_time(WallClock::min())
 {
     m_worker = Thread([this]{ worker_loop(); });
 }
@@ -249,7 +250,7 @@ void StreamHistoryTracker::on_frame(std::shared_ptr<const VideoFrame> frame){
     //    cout << "on_frame() = " << m_frames.size() << endl;
 
         // Initialize on first frame
-        if (m_next_frame_time == WallClock{}){
+        if (m_next_frame_time == WallClock::min()){
             m_next_frame_time = frame->timestamp;
         }
 

SerialPrograms/Source/CommonFramework/Recording/StreamHistoryTracker_SaveFrames.h

@@ -75,13 +75,13 @@ class StreamHistoryTracker{
     const bool m_has_video;
     size_t m_target_fps;
     std::chrono::microseconds m_frame_interval;
+    WallClock m_next_frame_time;
 
     //  We use shared_ptr here so it's fast to snapshot when we need to copy
     //  everything asynchronously.
     std::deque<std::shared_ptr<AudioBlock>> m_audio;
     std::deque<std::shared_ptr<const VideoFrame>> m_frames;
     std::deque<CompressedVideoFrame> m_compressed_frames;
-    WallClock m_next_frame_time;
 
     Thread m_worker;
     std::atomic<bool> m_stopping{false};