X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fmainwindow.cpp;h=4f6bc41d551c4182919539cb3810882f9e10e60d;hp=1a05907c9c1a4470be862fdf2691887411b915e3;hb=add091eb7183fb399db139f29f3a0b4c85bd4273;hpb=744aa24fc5a7084461e4e70595b96f1c3eac65e4

diff --git a/pv/mainwindow.cpp b/pv/mainwindow.cpp
index 1a05907c..4f6bc41d 100644
--- a/pv/mainwindow.cpp
+++ b/pv/mainwindow.cpp
@@ -74,6 +74,7 @@ using std::cerr;
 using std::endl;
 using std::list;
 using std::map;
+using std::max;
 using std::pair;
 using std::shared_ptr;
 using std::string;
@@ -257,7 +258,8 @@ void MainWindow::export_file(shared_ptr<OutputFormat> format,
 		const pv::util::Timestamp& start_time = view_->cursors()->first()->time();
 		const pv::util::Timestamp& end_time = view_->cursors()->second()->time();
 
-		const uint64_t start_sample = start_time.convert_to<double>() * samplerate;
+		const uint64_t start_sample =
+			std::max((double)0, start_time.convert_to<double>() * samplerate);
 		const uint64_t end_sample = end_time.convert_to<double>() * samplerate;
 
 		sample_range = std::make_pair(start_sample, end_sample);