From 20064d9681c6828d482e91de59add4e8e00ecdcf Mon Sep 17 00:00:00 2001
From: Trey Moen <50057480+greatgitsby@users.noreply.github.com>
Date: Sat, 12 Sep 2026 20:46:51 -0700
Subject: [PATCH] cabana: show placeholder for unresolved timestamps (#38870)

---
 openpilot/tools/cabana/ui/widgets/videowidget.cc | 15 ++++++++++-----
 openpilot/tools/cabana/ui/widgets/videowidget.h  |  2 +-
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/openpilot/tools/cabana/ui/widgets/videowidget.cc b/openpilot/tools/cabana/ui/widgets/videowidget.cc
index 0896951bab..7860a95138 100644
--- a/openpilot/tools/cabana/ui/widgets/videowidget.cc
+++ b/openpilot/tools/cabana/ui/widgets/videowidget.cc
@@ -147,8 +147,13 @@ void VideoWidget::drawPlaybackController() {
   const char *play_icon = can->isPaused() ? icon::PLAY : icon::PAUSE;
   const char *play_tooltip = can->isPaused() ? "Play" : "Pause";
   const char *loop_icon = getReplay() && getReplay()->loop() ? icon::REPEAT : icon::REPEAT_1;
-  const std::string time_text = slider_ ? formatTime(can->currentSec(), true) + " / " + formatTime(slider_->maximum() / slider_->factor)
-                                        : formatTime(can->currentSec(), true);
+  const bool timestamps_resolved = can->liveStreaming()
+                                     ? msgs_received_
+                                     : can->beginDateTime() != std::chrono::system_clock::time_point{};
+  const std::string time_text = timestamps_resolved
+                                  ? (slider_ ? formatTime(can->currentSec(), true) + " / " + formatTime(slider_->maximum() / slider_->factor)
+                                             : formatTime(can->currentSec(), true))
+                                  : "--:--.-- / --:--.--";
   const char *time_tooltip = settings.absolute_time ? "Elapsed time" : "Absolute time";
 
   std::vector<ToolbarItem> items;
@@ -161,14 +166,14 @@ void VideoWidget::drawPlaybackController() {
   } else {
     items.push_back(toolbarAction("fast-forward", icon::FAST_FORWARD, "Seek forward", []() { can->seekTo(can->currentSec() + 1); }));
   }
-  if (slider_ || msgs_received_) {
+  if (slider_ || timestamps_resolved) {
     // a mono font: with proportional digits the time changed width as it ticked and the items after it moved
-    pushMonoFont(ImGui::GetFontSize());
+    pushMonoFont(ImGui::GetStyle().FontSizeBase);
     const float time_width = ImGui::CalcTextSize(time_text.c_str()).x;
     popMonoFont();
     items.push_back({time_width,
                      [&]() {
-                       pushMonoFont(ImGui::GetFontSize());
+                       pushMonoFont(ImGui::GetStyle().FontSizeBase);
                        ImGui::AlignTextToFramePadding();
                        ImGui::TextUnformatted(time_text.c_str());
                        popMonoFont();
diff --git a/openpilot/tools/cabana/ui/widgets/videowidget.h b/openpilot/tools/cabana/ui/widgets/videowidget.h
index 1abdbdbe71..94b50dbf3f 100644
--- a/openpilot/tools/cabana/ui/widgets/videowidget.h
+++ b/openpilot/tools/cabana/ui/widgets/videowidget.h
@@ -112,7 +112,7 @@ private:
   std::string speed_text_;
   int speed_index_ = -1;  // checked entry of the speed menu
   bool skip_to_end_enabled_ = true;
-  bool msgs_received_ = false;  // the time is blank until the live stream delivers its first messages
+  bool msgs_received_ = false;  // live-stream timestamps resolve when the first messages arrive
   double thumbnail_display_time_ = -1;
   std::unique_ptr<Slider> slider_;
   std::unique_ptr<TabBar> camera_tab_;