diff --git a/aegisub/src/ass_dialogue.cpp b/aegisub/src/ass_dialogue.cpp
index 28d40fb7c..a55298b67 100644
--- a/aegisub/src/ass_dialogue.cpp
+++ b/aegisub/src/ass_dialogue.cpp
@@ -418,11 +418,7 @@ void AssDialogue::ProcessParameters(AssDialogueBlockOverride::ProcessParametersC
 
 bool AssDialogue::CollidesWith(AssDialogue *target) {
 	if (!target) return false;
-	int a = Start.GetMS();
-	int b = End.GetMS();
-	int c = target->Start.GetMS();
-	int d = target->End.GetMS();
-	return ((a < c) ? (c < b) : (a < d));
+	return ((Start < target->Start) ? (target->Start < End) : (Start < target->End));
 }
 
 wxString AssDialogue::GetStrippedText() const {
diff --git a/aegisub/src/ass_file.cpp b/aegisub/src/ass_file.cpp
index 6e9b92450..467a8db04 100644
--- a/aegisub/src/ass_file.cpp
+++ b/aegisub/src/ass_file.cpp
@@ -282,7 +282,7 @@ bool AssFile::CanSave() {
 		curdiag = dynamic_cast<AssDialogue*>(*cur);
 		if (curdiag) {
 			// Timed?
-			if (curdiag->Start.GetMS() != 0 || curdiag->End.GetMS() != 0) return false;
+			if (curdiag->Start != 0 || curdiag->End != 0) return false;
 
 			// Overrides?
 			curdiag->ParseASSTags();
diff --git a/aegisub/src/ass_karaoke.cpp b/aegisub/src/ass_karaoke.cpp
index b56fa8a1f..50bf2d5f8 100644
--- a/aegisub/src/ass_karaoke.cpp
+++ b/aegisub/src/ass_karaoke.cpp
@@ -65,7 +65,7 @@ void AssKaraoke::SetLine(AssDialogue *line, bool auto_split) {
 
 	syls.clear();
 	Syllable syl;
-	syl.start_time = line->Start.GetMS();
+	syl.start_time = line->Start;
 	syl.duration = 0;
 	syl.tag_type = "\\k";
 
@@ -133,7 +133,7 @@ void AssKaraoke::SetLine(AssDialogue *line, bool auto_split) {
 	line->ClearBlocks();
 
 	// Normalize the syllables so that the total duration is equal to the line length
-	int end_time = active_line->End.GetMS();
+	int end_time = active_line->End;
 	int last_end = syl.start_time + syl.duration;
 
 	// Total duration is shorter than the line length so just extend the last
@@ -142,7 +142,7 @@ void AssKaraoke::SetLine(AssDialogue *line, bool auto_split) {
 		syls.back().duration += end_time - last_end;
 	else if (last_end > end_time) {
 		// Shrink each syllable proportionately
-		int start_time = active_line->Start.GetMS();
+		int start_time = active_line->Start;
 		double scale_factor = double(end_time - start_time) / (last_end - start_time);
 
 		for (size_t i = 0; i < size(); ++i) {
@@ -285,8 +285,8 @@ void AssKaraoke::SplitLines(std::set<AssDialogue*> const& lines, agi::Context *c
 		for (iterator kit = kara.begin(); kit != kara.end(); ++kit) {
 			AssDialogue *new_line = new AssDialogue(*diag);
 
-			new_line->Start.SetMS(kit->start_time);
-			new_line->End.SetMS(kit->start_time + kit->duration);
+			new_line->Start = kit->start_time;
+			new_line->End = kit->start_time + kit->duration;
 			new_line->Text = kit->GetText(false);
 
 			c->ass->Line.insert(it, new_line);
diff --git a/aegisub/src/ass_time.cpp b/aegisub/src/ass_time.cpp
index 0cf57e509..215438d6f 100644
--- a/aegisub/src/ass_time.cpp
+++ b/aegisub/src/ass_time.cpp
@@ -45,7 +45,7 @@
 
 #include "utils.h"
 
-AssTime::AssTime(int time) { SetMS(time); }
+AssTime::AssTime(int time) : time(mid(0, time, 10 * 60 * 60 * 1000 - 1)) { }
 
 void AssTime::ParseASS(wxString const& text) {
 	int ms = 0;
@@ -72,15 +72,7 @@ void AssTime::ParseASS(wxString const& text) {
 	// Milliseconds (includes seconds)
 	ms += AegiStringToFix(text, 3, end, text.size());
 
-	SetMS(ms);
-}
-
-int AssTime::GetMS() const {
-	return time / 10 * 10;
-}
-
-void AssTime::SetMS(int ms) {
-	time = mid(0, ms, 10 * 60 * 60 * 1000 - 1);
+	*this = AssTime(ms);
 }
 
 wxString AssTime::GetASSFormated (bool msPrecision) const {
@@ -90,38 +82,6 @@ wxString AssTime::GetASSFormated (bool msPrecision) const {
 		return wxString::Format("%d:%02d:%02d.%02d", GetTimeHours(), GetTimeMinutes(), GetTimeSeconds(), GetTimeCentiseconds());
 }
 
-bool operator < (AssTime t1, AssTime t2) {
-	return t1.GetMS() < t2.GetMS();
-}
-
-bool operator > (AssTime t1, AssTime t2) {
-	return t1.GetMS() > t2.GetMS();
-}
-
-bool operator <= (AssTime t1, AssTime t2) {
-	return t1.GetMS() <= t2.GetMS();
-}
-
-bool operator >= (AssTime t1, AssTime t2) {
-	return t1.GetMS() >= t2.GetMS();
-}
-
-bool operator == (AssTime t1, AssTime t2) {
-	return t1.GetMS() == t2.GetMS();
-}
-
-bool operator != (AssTime t1, AssTime t2) {
-	return t1.GetMS() != t2.GetMS();
-}
-
-AssTime operator + (AssTime t1, AssTime t2) {
-	return AssTime(t1.GetMS() + t2.GetMS());
-}
-
-AssTime operator - (AssTime t1, AssTime t2) {
-	return AssTime(t1.GetMS() - t2.GetMS());
-}
-
 int AssTime::GetTimeHours() const { return time / 3600000; }
 int AssTime::GetTimeMinutes() const { return (time % 3600000) / 60000; }
 int AssTime::GetTimeSeconds() const { return (time % 60000) / 1000; }
@@ -134,16 +94,12 @@ FractionalTime::FractionalTime(agi::vfr::Framerate fps, bool dropframe)
 {
 }
 
-wxString FractionalTime::FromAssTime(AssTime time, char sep) {
-	return FromMillisecs(time.GetMS(), sep);
-}
-
-wxString FractionalTime::FromMillisecs(int64_t msec, char sep) {
+wxString FractionalTime::ToSMPTE(AssTime time, char sep) {
 	int h=0, m=0, s=0, f=0; // hours, minutes, seconds, fractions
-	int fn = fps.FrameAtTime(msec);
+	int fn = fps.FrameAtTime(time);
 
 	// return 00:00:00:00
-	if (msec <= 0) {
+	if (time <= 0) {
 	}
 	// dropframe?
 	else if (drop) {
diff --git a/aegisub/src/ass_time.h b/aegisub/src/ass_time.h
index 36cda3233..6320efac3 100644
--- a/aegisub/src/ass_time.h
+++ b/aegisub/src/ass_time.h
@@ -54,16 +54,15 @@ class AssTime {
 public:
 	AssTime(int ms = 0);
 
+	/// Get millisecond, rounded to centisecond precision
+	operator int() const { return time / 10 * 10; }
+
 	int GetTimeHours() const;        ///< Get the hours portion of this time
 	int GetTimeMinutes() const;      ///< Get the minutes portion of this time
 	int GetTimeSeconds() const;      ///< Get the seconds portion of this time
 	int GetTimeMiliseconds() const;  ///< Get the miliseconds portion of this time
 	int GetTimeCentiseconds() const; ///< Get the centiseconds portion of this time
 
-	/// Get millisecond, rounded to centisecond precision
-	int GetMS() const;
-	/// Sets values to milliseconds with bounds-checking
-	void SetMS(int ms);
 	/// Parse an ASS time string, leaving the time unchanged if the string is malformed
 	void ParseASS(wxString const& text);
 	/// Return the time as a string
@@ -71,17 +70,6 @@ public:
 	wxString GetASSFormated(bool ms=false) const;
 };
 
-// Comparison operators
-bool operator == (AssTime t1, AssTime t2);
-bool operator != (AssTime t1, AssTime t2);
-bool operator <  (AssTime t1, AssTime t2);
-bool operator >  (AssTime t1, AssTime t2);
-bool operator <= (AssTime t1, AssTime t2);
-bool operator >= (AssTime t1, AssTime t2);
-// Arithmetic operators
-AssTime operator + (AssTime t1, AssTime t2);
-AssTime operator - (AssTime t1, AssTime t2);
-
 /// DOCME
 /// @class FractionalTime
 /// @brief DOCME
@@ -101,7 +89,5 @@ public:
 	agi::vfr::Framerate const& FPS() const { return fps; }
 
 	/// Convert an AssTime to a SMPTE timecode
-	wxString FromAssTime(AssTime time, char sep=':');
-	/// Convert milliseconds to a SMPTE timecode
-	wxString FromMillisecs(int64_t msec, char sep=':');
+	wxString ToSMPTE(AssTime time, char sep=':');
 };
diff --git a/aegisub/src/audio_display.cpp b/aegisub/src/audio_display.cpp
index 7f8221249..fc024b6b0 100644
--- a/aegisub/src/audio_display.cpp
+++ b/aegisub/src/audio_display.cpp
@@ -1058,8 +1058,7 @@ void AudioDisplay::SetTrackCursor(int new_pos, bool show_time)
 
 		if (show_time)
 		{
-			AssTime new_label_time;
-			new_label_time.SetMS(controller->MillisecondsFromSamples(SamplesFromAbsoluteX(track_cursor_pos)));
+			AssTime new_label_time = controller->MillisecondsFromSamples(SamplesFromAbsoluteX(track_cursor_pos));
 			track_cursor_label = new_label_time.GetASSFormated();
 			track_cursor_label_rect.x += new_pos - old_pos;
 			RefreshRect(track_cursor_label_rect, false);
diff --git a/aegisub/src/audio_timing_dialogue.cpp b/aegisub/src/audio_timing_dialogue.cpp
index 0103f8c93..42592351c 100644
--- a/aegisub/src/audio_timing_dialogue.cpp
+++ b/aegisub/src/audio_timing_dialogue.cpp
@@ -427,8 +427,8 @@ void AudioTimingControllerDialogue::Commit()
 		context->selectionController->GetSelectedSet(sel);
 		for (Selection::iterator sub = sel.begin(); sub != sel.end(); ++sub)
 		{
-			(*sub)->Start.SetMS(new_start_ms);
-			(*sub)->End.SetMS(new_end_ms);
+			(*sub)->Start = new_start_ms;
+			(*sub)->End = new_end_ms;
 		}
 
 		commit_connection.Block();
@@ -450,7 +450,7 @@ void AudioTimingControllerDialogue::Commit()
 		///       like the edit box, so maybe add a way to do that which both
 		///       this and the edit box can use
 		Next();
-		if (context->selectionController->GetActiveLine()->End.GetMS() == 0) {
+		if (context->selectionController->GetActiveLine()->End == 0) {
 			const int default_duration = OPT_GET("Timing/Default Duration")->GetInt();
 			active_markers[0].SetPosition(context->audioController->SamplesFromMilliseconds(new_end_ms));
 			active_markers[1].SetPosition(context->audioController->SamplesFromMilliseconds(new_end_ms + default_duration));
@@ -467,10 +467,10 @@ void AudioTimingControllerDialogue::Revert()
 		AssTime new_start = line->Start;
 		AssTime new_end = line->End;
 
-		if (new_start.GetMS() != 0 || new_end.GetMS() != 0)
+		if (new_start != 0 || new_end != 0)
 		{
-			active_markers[0].SetPosition(context->audioController->SamplesFromMilliseconds(new_start.GetMS()));
-			active_markers[1].SetPosition(context->audioController->SamplesFromMilliseconds(new_end.GetMS()));
+			active_markers[0].SetPosition(context->audioController->SamplesFromMilliseconds(new_start));
+			active_markers[1].SetPosition(context->audioController->SamplesFromMilliseconds(new_end));
 			timing_modified = false;
 			UpdateSelection();
 		}
@@ -558,9 +558,9 @@ void AudioTimingControllerDialogue::RegenerateInactiveLines()
 			if (AssDialogue *prev = dynamic_cast<AssDialogue*>(*it))
 			{
 				inactive_markers.push_back(InactiveLineMarker(
-					context->audioController->SamplesFromMilliseconds(prev->Start.GetMS()), true));
+					context->audioController->SamplesFromMilliseconds(prev->Start), true));
 				inactive_markers.push_back(InactiveLineMarker(
-					context->audioController->SamplesFromMilliseconds(prev->End.GetMS()), false));
+					context->audioController->SamplesFromMilliseconds(prev->End), false));
 			}
 		}
 		break;
@@ -574,9 +574,9 @@ void AudioTimingControllerDialogue::RegenerateInactiveLines()
 			if (line && line != active_line)
 			{
 				inactive_markers.push_back(InactiveLineMarker(
-					context->audioController->SamplesFromMilliseconds(line->Start.GetMS()), true));
+					context->audioController->SamplesFromMilliseconds(line->Start), true));
 				inactive_markers.push_back(InactiveLineMarker(
-					context->audioController->SamplesFromMilliseconds(line->End.GetMS()), false));
+					context->audioController->SamplesFromMilliseconds(line->End), false));
 			}
 		}
 		break;
diff --git a/aegisub/src/audio_timing_karaoke.cpp b/aegisub/src/audio_timing_karaoke.cpp
index 6b8f638bf..9fe981866 100644
--- a/aegisub/src/audio_timing_karaoke.cpp
+++ b/aegisub/src/audio_timing_karaoke.cpp
@@ -151,8 +151,8 @@ AudioTimingControllerKaraoke::AudioTimingControllerKaraoke(agi::Context *c, AssK
 , separator_pen("Colour/Audio Display/Syllable Boundaries", "Audio/Line Boundaries Thickness", wxPENSTYLE_DOT)
 , start_pen("Colour/Audio Display/Line boundary Start", "Audio/Line Boundaries Thickness")
 , end_pen("Colour/Audio Display/Line boundary End", "Audio/Line Boundaries Thickness")
-, start_marker(ToSamples(active_line->Start.GetMS()), &start_pen, AudioMarker::Feet_Right)
-, end_marker(ToSamples(active_line->End.GetMS()), &end_pen, AudioMarker::Feet_Left)
+, start_marker(ToSamples(active_line->Start), &start_pen, AudioMarker::Feet_Right)
+, end_marker(ToSamples(active_line->End), &end_pen, AudioMarker::Feet_Left)
 , keyframes_provider(c, "Audio/Display/Draw/Keyframes in Karaoke Mode")
 , auto_commit(OPT_GET("Audio/Auto/Commit")->GetBool())
 , auto_next(OPT_GET("Audio/Next Line on Commit")->GetBool())
@@ -253,8 +253,8 @@ void AudioTimingControllerKaraoke::Revert() {
 	cur_syl = 0;
 	commit_id = -1;
 
-	start_marker.Move(ToSamples(active_line->Start.GetMS()));
-	end_marker.Move(ToSamples(active_line->End.GetMS()));
+	start_marker.Move(ToSamples(active_line->Start));
+	end_marker.Move(ToSamples(active_line->End));
 
 	markers.clear();
 	labels.clear();
diff --git a/aegisub/src/auto4_lua_assfile.cpp b/aegisub/src/auto4_lua_assfile.cpp
index a99f2040d..2bcdcc435 100644
--- a/aegisub/src/auto4_lua_assfile.cpp
+++ b/aegisub/src/auto4_lua_assfile.cpp
@@ -219,8 +219,8 @@ namespace Automation4 {
 
 			set_field(L, "layer", dia->Layer);
 
-			set_field(L, "start_time", dia->Start.GetMS());
-			set_field(L, "end_time", dia->End.GetMS());
+			set_field(L, "start_time", dia->Start);
+			set_field(L, "end_time", dia->End);
 
 			set_field(L, "style", dia->Style);
 			set_field(L, "actor", dia->Actor);
@@ -351,8 +351,8 @@ namespace Automation4 {
 
 				dia->Comment = get_bool_field(L, "comment", "dialogue");
 				dia->Layer = get_int_field(L, "layer", "dialogue");
-				dia->Start.SetMS(get_int_field(L, "start_time", "dialogue"));
-				dia->End.SetMS(get_int_field(L, "end_time", "dialogue"));
+				dia->Start = get_int_field(L, "start_time", "dialogue");
+				dia->End = get_int_field(L, "end_time", "dialogue");
 				dia->Style = get_string_field(L, "style", "dialogue");
 				dia->Actor = get_string_field(L, "actor", "dialogue");
 				dia->Margin[0] = get_int_field(L, "margin_l", "dialogue");
diff --git a/aegisub/src/base_grid.cpp b/aegisub/src/base_grid.cpp
index e1d744335..0f9e6a7ba 100644
--- a/aegisub/src/base_grid.cpp
+++ b/aegisub/src/base_grid.cpp
@@ -604,8 +604,8 @@ void BaseGrid::GetRowStrings(int row, AssDialogue *line, bool *paint_columns, wx
 	if (paint_columns[0]) strings[0] = wxString::Format("%d", row + 1);
 	if (paint_columns[1]) strings[1] = wxString::Format("%d", line->Layer);
 	if (byFrame) {
-		if (paint_columns[2]) strings[2] = wxString::Format("%d", context->videoController->FrameAtTime(line->Start.GetMS(), agi::vfr::START));
-		if (paint_columns[3]) strings[3] = wxString::Format("%d", context->videoController->FrameAtTime(line->End.GetMS(), agi::vfr::END));
+		if (paint_columns[2]) strings[2] = wxString::Format("%d", context->videoController->FrameAtTime(line->Start, agi::vfr::START));
+		if (paint_columns[3]) strings[3] = wxString::Format("%d", context->videoController->FrameAtTime(line->End, agi::vfr::END));
 	}
 	else {
 		if (paint_columns[2]) strings[2] = line->Start.GetASSFormated();
@@ -737,7 +737,7 @@ void BaseGrid::OnMouseEvent(wxMouseEvent &event) {
 		// Normal click
 		if ((click || dclick) && !shift && !ctrl && !alt) {
 			SetActiveLine(dlg);
-			if (dclick) context->videoController->JumpToTime(dlg->Start.GetMS());
+			if (dclick) context->videoController->JumpToTime(dlg->Start);
 			SelectRow(row,false);
 			lastRow = row;
 			return;
@@ -887,8 +887,8 @@ void BaseGrid::SetColumnWidths() {
 
 		// Times
 		if (byFrame) {
-			maxStart = std::max(maxStart, context->videoController->FrameAtTime(curDiag->Start.GetMS(), agi::vfr::START));
-			maxEnd = std::max(maxEnd, context->videoController->FrameAtTime(curDiag->End.GetMS(), agi::vfr::END));
+			maxStart = std::max(maxStart, context->videoController->FrameAtTime(curDiag->Start, agi::vfr::START));
+			maxEnd = std::max(maxEnd, context->videoController->FrameAtTime(curDiag->End, agi::vfr::END));
 		}
 	}
 
@@ -970,8 +970,8 @@ bool BaseGrid::IsDisplayed(const AssDialogue *line) const {
 	if (!context->videoController->IsLoaded()) return false;
 	int frame = context->videoController->GetFrameN();
 	return
-		context->videoController->FrameAtTime(line->Start.GetMS(),agi::vfr::START) <= frame &&
-		context->videoController->FrameAtTime(line->End.GetMS(),agi::vfr::END) >= frame;
+		context->videoController->FrameAtTime(line->Start,agi::vfr::START) <= frame &&
+		context->videoController->FrameAtTime(line->End,agi::vfr::END) >= frame;
 }
 
 void BaseGrid::OnKeyDown(wxKeyEvent &event) {
diff --git a/aegisub/src/command/audio.cpp b/aegisub/src/command/audio.cpp
index c91d2e984..2b0c0bd74 100644
--- a/aegisub/src/command/audio.cpp
+++ b/aegisub/src/command/audio.cpp
@@ -212,8 +212,8 @@ struct audio_save_clip : public Command {
 		for (Selection::iterator it = sel.begin(); it != sel.end(); ++it) {
 			c->audioController->SaveClip(
 				wxFileSelector(_("Save audio clip"), "", "", "wav", "", wxFD_SAVE|wxFD_OVERWRITE_PROMPT, c->parent),
-				SampleRange(c->audioController->SamplesFromMilliseconds((*it)->Start.GetMS()),
-							c->audioController->SamplesFromMilliseconds((*it)->End.GetMS())));
+				SampleRange(c->audioController->SamplesFromMilliseconds((*it)->Start),
+							c->audioController->SamplesFromMilliseconds((*it)->End)));
 		}
 	}
 };
diff --git a/aegisub/src/command/edit.cpp b/aegisub/src/command/edit.cpp
index 3cb257675..ba95a50bf 100644
--- a/aegisub/src/command/edit.cpp
+++ b/aegisub/src/command/edit.cpp
@@ -185,7 +185,7 @@ static void combine_lines(agi::Context *c, void (*combiner)(AssDialogue *, AssDi
 
 		combiner(first, diag);
 
-		first->End.SetMS(diag->End.GetMS());
+		first->End = diag->End;
 		delete diag;
 	}
 
@@ -198,7 +198,7 @@ static void combine_lines(agi::Context *c, void (*combiner)(AssDialogue *, AssDi
 }
 
 static void combine_karaoke(AssDialogue *first, AssDialogue *second) {
-	first->Text += wxString::Format("{\\k%d}%s", (second->Start.GetMS() - first->End.GetMS()) / 10, second->Text);
+	first->Text += wxString::Format("{\\k%d}%s", (second->Start - first->End) / 10, second->Text);
 }
 
 static void combine_concat(AssDialogue *first, AssDialogue *second) {
diff --git a/aegisub/src/command/subtitle.cpp b/aegisub/src/command/subtitle.cpp
index 988beab7d..35c2018f3 100644
--- a/aegisub/src/command/subtitle.cpp
+++ b/aegisub/src/command/subtitle.cpp
@@ -128,8 +128,8 @@ static void insert_subtitle_at_video(agi::Context *c, bool after) {
 	// Create line to add
 	AssDialogue *def = new AssDialogue;
 	int video_ms = c->videoController->TimeAtFrame(c->videoController->GetFrameN(), agi::vfr::START);
-	def->Start.SetMS(video_ms);
-	def->End.SetMS(video_ms + OPT_GET("Timing/Default Duration")->GetInt());
+	def->Start = video_ms;
+	def->End = video_ms + OPT_GET("Timing/Default Duration")->GetInt();
 	def->Style = c->subsGrid->GetDialogue(n)->Style;
 
 	// Insert it
@@ -156,13 +156,13 @@ struct subtitle_insert_after : public validate_nonempty_selection {
 		if (n == nrows-1) {
 			def->Start = c->subsGrid->GetDialogue(n)->End;
 			def->End = c->subsGrid->GetDialogue(n)->End;
-			def->End.SetMS(def->End.GetMS()+OPT_GET("Timing/Default Duration")->GetInt());
+			def->End = def->End + OPT_GET("Timing/Default Duration")->GetInt();
 		}
 		else {
 			def->Start = c->subsGrid->GetDialogue(n)->End;
 			def->End = c->subsGrid->GetDialogue(n+1)->Start;
 		}
-		if (def->End.GetMS() < def->Start.GetMS()) def->End.SetMS(def->Start.GetMS()+OPT_GET("Timing/Default Duration")->GetInt());
+		if (def->End < def->Start) def->End = def->Start + OPT_GET("Timing/Default Duration")->GetInt();
 		def->Style = c->subsGrid->GetDialogue(n)->Style;
 
 		// Insert it
@@ -200,18 +200,18 @@ struct subtitle_insert_before : public validate_nonempty_selection {
 		// Create line to add
 		AssDialogue *def = new AssDialogue;
 		if (n == 0) {
-			def->Start.SetMS(0);
+			def->Start = 0;
 			def->End = c->subsGrid->GetDialogue(n)->Start;
 		}
-		else if (c->subsGrid->GetDialogue(n-1)->End.GetMS() > c->subsGrid->GetDialogue(n)->Start.GetMS()) {
-			def->Start.SetMS(c->subsGrid->GetDialogue(n)->Start.GetMS()-OPT_GET("Timing/Default Duration")->GetInt());
+		else if (c->subsGrid->GetDialogue(n-1)->End > c->subsGrid->GetDialogue(n)->Start) {
+			def->Start = c->subsGrid->GetDialogue(n)->Start-OPT_GET("Timing/Default Duration")->GetInt();
 			def->End = c->subsGrid->GetDialogue(n)->Start;
 		}
 		else {
 			def->Start = c->subsGrid->GetDialogue(n-1)->End;
 			def->End = c->subsGrid->GetDialogue(n)->Start;
 		}
-		if (def->End.GetMS() < def->Start.GetMS()) def->End.SetMS(def->Start.GetMS()+OPT_GET("Timing/Default Duration")->GetInt());
+		if (def->End < def->Start) def->End = def->Start+OPT_GET("Timing/Default Duration")->GetInt();
 		def->Style = c->subsGrid->GetDialogue(n)->Style;
 
 		// Insert it
@@ -408,8 +408,8 @@ struct subtitle_select_visible : public Command {
 		for (entryIter it = c->ass->Line.begin(); it != c->ass->Line.end(); ++it) {
 			AssDialogue *diag = dynamic_cast<AssDialogue*>(*it);
 			if (diag &&
-				c->videoController->FrameAtTime(diag->Start.GetMS(), agi::vfr::START) <= frame &&
-				c->videoController->FrameAtTime(diag->End.GetMS(), agi::vfr::END) >= frame)
+				c->videoController->FrameAtTime(diag->Start, agi::vfr::START) <= frame &&
+				c->videoController->FrameAtTime(diag->End, agi::vfr::END) >= frame)
 			{
 				if (new_selection.empty())
 					c->selectionController->SetActiveLine(diag);
diff --git a/aegisub/src/command/time.cpp b/aegisub/src/command/time.cpp
index 4ce8a8dff..fb408bca3 100644
--- a/aegisub/src/command/time.cpp
+++ b/aegisub/src/command/time.cpp
@@ -135,11 +135,11 @@ struct time_frame_current : public validate_video_loaded {
 
 		if (sel.empty() || !active_line) return;
 
-		int shift_by = c->videoController->TimeAtFrame(c->videoController->GetFrameN(), agi::vfr::START) - active_line->Start.GetMS();
+		int shift_by = c->videoController->TimeAtFrame(c->videoController->GetFrameN(), agi::vfr::START) - active_line->Start;
 
 		for (std::set<AssDialogue*>::iterator it = sel.begin(); it != sel.end(); ++it) {
-			(*it)->Start.SetMS((*it)->Start.GetMS() + shift_by);
-			(*it)->End.SetMS((*it)->End.GetMS() + shift_by);
+			(*it)->Start = (*it)->Start + shift_by;
+			(*it)->End = (*it)->End + shift_by;
 		}
 
 		c->ass->Commit(_("shift to frame"), AssFile::COMMIT_DIAG_TIME);
@@ -169,10 +169,10 @@ static void snap_subs_video(agi::Context *c, bool set_start) {
 	int end = c->videoController->TimeAtFrame(c->videoController->GetFrameN(), agi::vfr::END);
 
 	for (std::set<AssDialogue*>::iterator it = sel.begin(); it != sel.end(); ++it) {
-		if (set_start || (*it)->Start.GetMS() > start)
-			(*it)->Start.SetMS(start);
-		if (!set_start || (*it)->End.GetMS() < end)
-			(*it)->End.SetMS(end);
+		if (set_start || (*it)->Start > start)
+			(*it)->Start = start;
+		if (!set_start || (*it)->End < end)
+			(*it)->End = end;
 	}
 
 	c->ass->Commit(_("timing"), AssFile::COMMIT_DIAG_TIME);
@@ -235,8 +235,8 @@ struct time_snap_scene : public validate_video_loaded {
 		// Update rows
 		for (size_t i=0;i<sel.Count();i++) {
 			cur = c->subsGrid->GetDialogue(sel[i]);
-			cur->Start.SetMS(start_ms);
-			cur->End.SetMS(end_ms);
+			cur->Start = start_ms;
+			cur->End = end_ms;
 		}
 
 		// Commit
@@ -251,7 +251,7 @@ struct time_add_lead_in : public Command {
 	STR_HELP("Add lead in")
 	void operator()(agi::Context *c) {
 		if (AssDialogue *line = c->selectionController->GetActiveLine()) {
-			line->Start.SetMS(line->Start.GetMS() - OPT_GET("Audio/Lead/IN")->GetInt());
+			line->Start = line->Start - OPT_GET("Audio/Lead/IN")->GetInt();
 			c->ass->Commit(_("add lead in"), AssFile::COMMIT_DIAG_TIME);
 		}
 	}
@@ -264,7 +264,7 @@ struct time_add_lead_out : public Command {
 	STR_HELP("Add lead out")
 	void operator()(agi::Context *c) {
 		if (AssDialogue *line = c->selectionController->GetActiveLine()) {
-			line->End.SetMS(line->End.GetMS() + OPT_GET("Audio/Lead/OUT")->GetInt());
+			line->End = line->End + OPT_GET("Audio/Lead/OUT")->GetInt();
 			c->ass->Commit(_("add lead out"), AssFile::COMMIT_DIAG_TIME);
 		}
 	}
diff --git a/aegisub/src/command/video.cpp b/aegisub/src/command/video.cpp
index 103a4eaec..5430c87ea 100644
--- a/aegisub/src/command/video.cpp
+++ b/aegisub/src/command/video.cpp
@@ -353,13 +353,13 @@ struct video_frame_next_boundary : public validator_video_loaded {
 		AssDialogue *active_line = c->selectionController->GetActiveLine();
 		if (!active_line) return;
 
-		int target = c->videoController->FrameAtTime(active_line->Start.GetMS(), agi::vfr::START);
+		int target = c->videoController->FrameAtTime(active_line->Start, agi::vfr::START);
 		if (target > c->videoController->GetFrameN()) {
 			c->videoController->JumpToFrame(target);
 			return;
 		}
 
-		target = c->videoController->FrameAtTime(active_line->End.GetMS(), agi::vfr::END);
+		target = c->videoController->FrameAtTime(active_line->End, agi::vfr::END);
 		if (target > c->videoController->GetFrameN()) {
 			c->videoController->JumpToFrame(target);
 			return;
@@ -368,7 +368,7 @@ struct video_frame_next_boundary : public validator_video_loaded {
 		c->selectionController->NextLine();
 		AssDialogue *new_line = c->selectionController->GetActiveLine();
 		if (new_line != active_line)
-		c->videoController->JumpToTime(new_line->Start.GetMS());
+		c->videoController->JumpToTime(new_line->Start);
 	}
 };
 
@@ -424,13 +424,13 @@ struct video_frame_prev_boundary : public validator_video_loaded {
 		AssDialogue *active_line = c->selectionController->GetActiveLine();
 		if (!active_line) return;
 
-		int target = c->videoController->FrameAtTime(active_line->End.GetMS(), agi::vfr::END);
+		int target = c->videoController->FrameAtTime(active_line->End, agi::vfr::END);
 		if (target < c->videoController->GetFrameN()) {
 			c->videoController->JumpToFrame(target);
 			return;
 		}
 
-		target = c->videoController->FrameAtTime(active_line->Start.GetMS(), agi::vfr::START);
+		target = c->videoController->FrameAtTime(active_line->Start, agi::vfr::START);
 		if (target < c->videoController->GetFrameN()) {
 			c->videoController->JumpToFrame(target);
 			return;
@@ -439,7 +439,7 @@ struct video_frame_prev_boundary : public validator_video_loaded {
 		c->selectionController->PrevLine();
 		AssDialogue *new_line = c->selectionController->GetActiveLine();
 		if (new_line != active_line)
-			c->videoController->JumpToTime(new_line->End.GetMS(), agi::vfr::END);
+			c->videoController->JumpToTime(new_line->End, agi::vfr::END);
 	}
 };
 
@@ -560,7 +560,7 @@ struct video_jump_end : public validator_video_loaded {
 
 	void operator()(agi::Context *c) {
 		if (AssDialogue *active_line = c->selectionController->GetActiveLine()) {
-			c->videoController->JumpToTime(active_line->End.GetMS(), agi::vfr::END);
+			c->videoController->JumpToTime(active_line->End, agi::vfr::END);
 		}
 	}
 };
@@ -574,7 +574,7 @@ struct video_jump_start : public validator_video_loaded {
 
 	void operator()(agi::Context *c) {
 		if (AssDialogue *active_line = c->selectionController->GetActiveLine()) {
-			c->videoController->JumpToTime(active_line->Start.GetMS());
+			c->videoController->JumpToTime(active_line->Start);
 		}
 	}
 };
diff --git a/aegisub/src/dialog_jumpto.cpp b/aegisub/src/dialog_jumpto.cpp
index f4a503776..738345a9e 100644
--- a/aegisub/src/dialog_jumpto.cpp
+++ b/aegisub/src/dialog_jumpto.cpp
@@ -62,8 +62,7 @@ DialogJumpTo::DialogJumpTo(agi::Context *c)
 	SetIcon(BitmapToIcon(GETIMAGE(jumpto_button_24)));
 
 	// Set initial values
-	AssTime jumptime;
-	jumptime.SetMS(c->videoController->TimeAtFrame(jumpframe));
+	AssTime jumptime = c->videoController->TimeAtFrame(jumpframe);
 	wxString maxLength = wxString::Format("%i",c->videoController->GetLength() - 1);
 
 	// Times
@@ -111,7 +110,7 @@ void DialogJumpTo::OnOK(wxCommandEvent &) {
 }
 
 void DialogJumpTo::OnEditTime (wxCommandEvent &) {
-	long newframe = c->videoController->FrameAtTime(JumpTime->GetMS());
+	long newframe = c->videoController->FrameAtTime(JumpTime->GetTime());
 	if (jumpframe != newframe) {
 		jumpframe = newframe;
 		JumpFrame->ChangeValue(wxString::Format("%i", jumpframe));
@@ -120,5 +119,5 @@ void DialogJumpTo::OnEditTime (wxCommandEvent &) {
 
 void DialogJumpTo::OnEditFrame (wxCommandEvent &event) {
 	JumpFrame->GetValue().ToLong(&jumpframe);
-	JumpTime->SetMS(c->videoController->TimeAtFrame(jumpframe));
+	JumpTime->SetTime(c->videoController->TimeAtFrame(jumpframe));
 }
diff --git a/aegisub/src/dialog_shift_times.cpp b/aegisub/src/dialog_shift_times.cpp
index e38b939b8..24c75fe6c 100644
--- a/aegisub/src/dialog_shift_times.cpp
+++ b/aegisub/src/dialog_shift_times.cpp
@@ -193,7 +193,7 @@ void DialogShiftTimes::OnClose(wxCommandEvent &) {
 	long shift;
 	shift_frames->GetValue().ToLong(&shift);
 
-	OPT_SET("Tool/Shift Times/Time")->SetInt(shift_time->GetMS());
+	OPT_SET("Tool/Shift Times/Time")->SetInt(shift_time->GetTime());
 	OPT_SET("Tool/Shift Times/Frames")->SetInt(shift);
 	OPT_SET("Tool/Shift Times/ByTime")->SetBool(shift_by_time->GetValue());
 	OPT_SET("Tool/Shift Times/Type")->SetInt(time_fields->GetSelection());
@@ -289,7 +289,7 @@ void DialogShiftTimes::Process(wxCommandEvent &) {
 
 	long shift;
 	if (by_time) {
-		shift = shift_time->GetMS();
+		shift = shift_time->GetTime();
 		if (shift == 0) {
 			Close();
 			return;
@@ -323,9 +323,9 @@ void DialogShiftTimes::Process(wxCommandEvent &) {
 			block_start = row_number;
 
 		if (start)
-			line->Start.SetMS(Shift(line->Start.GetMS(), shift, by_time, agi::vfr::START));
+			line->Start = Shift(line->Start, shift, by_time, agi::vfr::START);
 		if (end)
-			line->End.SetMS(Shift(line->End.GetMS(), shift, by_time, agi::vfr::END));
+			line->End = Shift(line->End, shift, by_time, agi::vfr::END);
 	}
 
 	context->ass->Commit(_("shifting"), AssFile::COMMIT_DIAG_TIME);
diff --git a/aegisub/src/dialog_styling_assistant.cpp b/aegisub/src/dialog_styling_assistant.cpp
index cf64e9163..8ffd38601 100644
--- a/aegisub/src/dialog_styling_assistant.cpp
+++ b/aegisub/src/dialog_styling_assistant.cpp
@@ -180,7 +180,7 @@ void DialogStyling::OnActiveLineChanged(AssDialogue *new_line) {
 	style_list->SetStringSelection(active_line->Style);
 
 	if (auto_seek->IsChecked() && IsActive())
-		c->videoController->JumpToTime(active_line->Start.GetMS());
+		c->videoController->JumpToTime(active_line->Start);
 }
 
 void DialogStyling::Commit(bool next) {
@@ -201,7 +201,7 @@ void DialogStyling::OnActivate(wxActivateEvent &) {
 	style_list->Set(c->ass->GetStyles());
 
 	if (auto_seek->IsChecked())
-		c->videoController->JumpToTime(active_line->Start.GetMS());
+		c->videoController->JumpToTime(active_line->Start);
 
 	style_name->SetFocus();
 }
diff --git a/aegisub/src/dialog_timing_processor.cpp b/aegisub/src/dialog_timing_processor.cpp
index df831f61e..a994a110e 100644
--- a/aegisub/src/dialog_timing_processor.cpp
+++ b/aegisub/src/dialog_timing_processor.cpp
@@ -299,7 +299,7 @@ void DialogTimingProcessor::OnApply(wxCommandEvent &) {
 	// Check if rows are valid
 	for (entryIter cur = c->ass->Line.begin(); cur != c->ass->Line.end(); ++cur) {
 		if (AssDialogue *tempDiag = dynamic_cast<AssDialogue*>(*cur)) {
-			if (tempDiag->Start.GetMS() > tempDiag->End.GetMS()) {
+			if (tempDiag->Start > tempDiag->End) {
 				wxMessageBox(
 					wxString::Format(
 						_("One of the lines in the file (%i) has negative duration. Aborting."),
@@ -371,7 +371,7 @@ void DialogTimingProcessor::Process() {
 
 			// Compare to every previous line (yay for O(n^2)!) to see if it's OK to add lead-in
 			if (inVal) {
-				int startLead = cur->Start.GetMS() - inVal;
+				int startLead = cur->Start - inVal;
 				for (int j=0;j<i;j++) {
 					AssDialogue *comp = Sorted[j];
 
@@ -379,14 +379,14 @@ void DialogTimingProcessor::Process() {
 					if (cur->CollidesWith(comp)) continue;
 
 					// Get comparison times
-					startLead = std::max(startLead, comp->End.GetMS());
+					startLead = std::max<int>(startLead, comp->End);
 				}
-				cur->Start.SetMS(startLead);
+				cur->Start = startLead;
 			}
 
 			// Compare to every line to see how far can lead-out be extended
 			if (outVal) {
-				int endLead = cur->End.GetMS() + outVal;
+				int endLead = cur->End + outVal;
 				for (int j=i+1;j<rows;j++) {
 					AssDialogue *comp = Sorted[j];
 
@@ -394,9 +394,9 @@ void DialogTimingProcessor::Process() {
 					if (cur->CollidesWith(comp)) continue;
 
 					// Get comparison times
-					endLead = std::min(endLead, comp->Start.GetMS());
+					endLead = std::min<int>(endLead, comp->Start);
 				}
-				cur->End.SetMS(endLead);
+				cur->End = endLead;
 			}
 		}
 	}
@@ -417,13 +417,11 @@ void DialogTimingProcessor::Process() {
 			if (cur->CollidesWith(prev)) continue;
 
 			// Compare distance
-			int curStart = cur->Start.GetMS();
-			int prevEnd = prev->End.GetMS();
-			int dist = curStart-prevEnd;
+			int dist = cur->Start - prev->End;
 			if (dist > 0 && dist <= adjsThres) {
-				int setPos = prevEnd+int(dist*bias);
-				cur->Start.SetMS(setPos);
-				prev->End.SetMS(setPos);
+				int setPos = prev->End + int(dist*bias);
+				cur->Start = setPos;
+				prev->End = setPos;
 			}
 
 			prev = cur;
@@ -449,19 +447,19 @@ void DialogTimingProcessor::Process() {
 			AssDialogue *cur = Sorted[i];
 
 			// Get start/end frames
-			int startF = c->videoController->FrameAtTime(cur->Start.GetMS(),agi::vfr::START);
-			int endF = c->videoController->FrameAtTime(cur->End.GetMS(),agi::vfr::END);
+			int startF = c->videoController->FrameAtTime(cur->Start,agi::vfr::START);
+			int endF = c->videoController->FrameAtTime(cur->End,agi::vfr::END);
 
 			// Get closest for start
 			int closest = GetClosestKeyFrame(startF);
 			if ((closest > startF && closest-startF <= beforeStart) || (closest < startF && startF-closest <= afterStart)) {
-				cur->Start.SetMS(c->videoController->TimeAtFrame(closest,agi::vfr::START));
+				cur->Start = c->videoController->TimeAtFrame(closest,agi::vfr::START);
 			}
 
 			// Get closest for end
 			closest = GetClosestKeyFrame(endF)-1;
 			if ((closest > endF && closest-endF <= beforeEnd) || (closest < endF && endF-closest <= afterEnd)) {
-				cur->End.SetMS(c->videoController->TimeAtFrame(closest,agi::vfr::END));
+				cur->End = c->videoController->TimeAtFrame(closest,agi::vfr::END);
 			}
 		}
 	}
diff --git a/aegisub/src/dialog_translation.cpp b/aegisub/src/dialog_translation.cpp
index 206f4806b..b97e64556 100644
--- a/aegisub/src/dialog_translation.cpp
+++ b/aegisub/src/dialog_translation.cpp
@@ -226,7 +226,7 @@ void DialogTranslation::UpdateDisplay() {
 
 	original_text->SetReadOnly(true);
 
-	if (seek_video->IsChecked()) c->videoController->JumpToTime(active_line->Start.GetMS());
+	if (seek_video->IsChecked()) c->videoController->JumpToTime(active_line->Start);
 
 	translated_text->ClearAll();
 	translated_text->SetFocus();
diff --git a/aegisub/src/export_framerate.cpp b/aegisub/src/export_framerate.cpp
index 2c7533e52..72a5018dc 100644
--- a/aegisub/src/export_framerate.cpp
+++ b/aegisub/src/export_framerate.cpp
@@ -176,7 +176,7 @@ void AssTransformFramerateFilter::TransformTimeTags(wxString name,int n,AssOverr
 
 	switch (curParam->classification) {
 		case PARCLASS_RELATIVE_TIME_START: {
-			int value = instance->ConvertTime(trunc_cs(curDiag->Start.GetMS()) + parVal) - instance->newStart;
+			int value = instance->ConvertTime(trunc_cs(curDiag->Start) + parVal) - instance->newStart;
 
 			// An end time of 0 is actually the end time of the line, so ensure
 			// nonzero is never converted to 0
@@ -188,10 +188,10 @@ void AssTransformFramerateFilter::TransformTimeTags(wxString name,int n,AssOverr
 			break;
 		}
 		case PARCLASS_RELATIVE_TIME_END:
-			curParam->Set(instance->newEnd - instance->ConvertTime(trunc_cs(curDiag->End.GetMS()) - parVal));
+			curParam->Set(instance->newEnd - instance->ConvertTime(trunc_cs(curDiag->End) - parVal));
 			break;
 		case PARCLASS_KARAOKE: {
-			int start = curDiag->Start.GetMS() / 10 + instance->oldK + parVal;
+			int start = curDiag->Start / 10 + instance->oldK + parVal;
 			int value = (instance->ConvertTime(start * 10) - instance->newStart) / 10 - instance->newK;
 			instance->oldK += parVal;
 			instance->newK += value;
@@ -212,14 +212,14 @@ void AssTransformFramerateFilter::TransformFrameRate(AssFile *subs) {
 			line = curDialogue;
 			newK = 0;
 			oldK = 0;
-			newStart = trunc_cs(ConvertTime(curDialogue->Start.GetMS()));
-			newEnd = trunc_cs(ConvertTime(curDialogue->End.GetMS()) + 9);
+			newStart = trunc_cs(ConvertTime(curDialogue->Start));
+			newEnd = trunc_cs(ConvertTime(curDialogue->End) + 9);
 
 			// Process stuff
 			curDialogue->ParseASSTags();
 			curDialogue->ProcessParameters(TransformTimeTags, this);
-			curDialogue->Start.SetMS(newStart);
-			curDialogue->End.SetMS(newEnd);
+			curDialogue->Start = newStart;
+			curDialogue->End = newEnd;
 			curDialogue->UpdateText();
 			curDialogue->ClearBlocks();
 		}
diff --git a/aegisub/src/mkv_wrap.cpp b/aegisub/src/mkv_wrap.cpp
index 5009a24b1..f0fe30799 100644
--- a/aegisub/src/mkv_wrap.cpp
+++ b/aegisub/src/mkv_wrap.cpp
@@ -96,9 +96,8 @@ static void read_subtitles(agi::ProgressSink *ps, MatroskaFile *file, MkvStdIO *
 
 		// Get start and end times
 		longlong timecodeScaleLow = 1000000;
-		AssTime subStart,subEnd;
-		subStart.SetMS(startTime / timecodeScaleLow);
-		subEnd.SetMS(endTime / timecodeScaleLow);
+		AssTime subStart = startTime / timecodeScaleLow;
+		AssTime subEnd = endTime / timecodeScaleLow;
 
 		// Process SSA/ASS
 		if (!srt) {
diff --git a/aegisub/src/subs_edit_box.cpp b/aegisub/src/subs_edit_box.cpp
index 0363403f8..48492227c 100644
--- a/aegisub/src/subs_edit_box.cpp
+++ b/aegisub/src/subs_edit_box.cpp
@@ -433,7 +433,7 @@ void SubsEditBox::OnActiveLineChanged(AssDialogue *new_line) {
 
 		if (sync) {
 			c->videoController->Stop();
-			c->videoController->JumpToTime(line->Start.GetMS());
+			c->videoController->JumpToTime(line->Start);
 		}
 	}
 	SetEvtHandlerEnabled(true);
diff --git a/aegisub/src/subs_grid.cpp b/aegisub/src/subs_grid.cpp
index 99379658c..98e3c56b3 100644
--- a/aegisub/src/subs_grid.cpp
+++ b/aegisub/src/subs_grid.cpp
@@ -69,8 +69,8 @@ static void trim_text(AssDialogue *diag) {
 }
 
 static void expand_times(AssDialogue *src, AssDialogue *dst) {
-	dst->Start.SetMS(std::min(dst->Start.GetMS(), src->Start.GetMS()));
-	dst->End.SetMS(std::max(dst->End.GetMS(), src->End.GetMS()));
+	dst->Start = std::min(dst->Start, src->Start);
+	dst->End = std::max(dst->End, src->End);
 }
 
 /// @brief Recombine 
@@ -246,8 +246,8 @@ void SubtitlesGrid::PasteLines(int n,bool pasteOver) {
 				curdiag = new AssDialogue();
 				curdiag->Text = curdata;
 				// Make sure pasted plain-text lines always are blank-timed
-				curdiag->Start.SetMS(0);
-				curdiag->End.SetMS(0);
+				curdiag->Start = 0;
+				curdiag->End = 0;
 			}
 
 			// Paste over
@@ -382,9 +382,9 @@ void SubtitlesGrid::DuplicateLines(int n1,int n2,bool nextFrame) {
 
 		// Shift to next frame
 		if (nextFrame) {
-			int posFrame = context->videoController->FrameAtTime(cur->End.GetMS(),agi::vfr::END) + 1;
-			cur->Start.SetMS(context->videoController->TimeAtFrame(posFrame,agi::vfr::START));
-			cur->End.SetMS(context->videoController->TimeAtFrame(posFrame,agi::vfr::END));
+			int posFrame = context->videoController->FrameAtTime(cur->End,agi::vfr::END) + 1;
+			cur->Start = context->videoController->TimeAtFrame(posFrame,agi::vfr::START);
+			cur->End = context->videoController->TimeAtFrame(posFrame,agi::vfr::END);
 		}
 
 		// Insert
@@ -411,9 +411,9 @@ void SubtitlesGrid::SplitLine(AssDialogue *n1,int pos,bool estimateTimes) {
 
 	if (estimateTimes) {
 		double splitPos = double(pos)/orig.Length();
-		int splitTime = (int)((n1->End.GetMS() - n1->Start.GetMS())*splitPos) + n1->Start.GetMS();
-		n1->End.SetMS(splitTime);
-		n2->Start.SetMS(splitTime);
+		int splitTime = (int)((n1->End - n1->Start)*splitPos) + n1->Start;
+		n1->End = splitTime;
+		n2->Start = splitTime;
 	}
 
 	context->ass->Commit(_("split"), AssFile::COMMIT_DIAG_ADDREM | AssFile::COMMIT_DIAG_FULL);
diff --git a/aegisub/src/subtitle_format_encore.cpp b/aegisub/src/subtitle_format_encore.cpp
index 4d029dc32..3641f92dc 100644
--- a/aegisub/src/subtitle_format_encore.cpp
+++ b/aegisub/src/subtitle_format_encore.cpp
@@ -76,7 +76,7 @@ void EncoreSubtitleFormat::WriteFile(wxString const& filename, wxString const& e
 	for (std::list<AssEntry*>::iterator cur=Line->begin();cur!=Line->end();cur++) {
 		if (AssDialogue *current = dynamic_cast<AssDialogue*>(*cur)) {
 			++i;
-			file.WriteLineToFile(wxString::Format("%i %s %s %s", i, ft.FromAssTime(current->Start, sep), ft.FromAssTime(current->End, sep), current->Text));
+			file.WriteLineToFile(wxString::Format("%i %s %s %s", i, ft.ToSMPTE(current->Start, sep), ft.ToSMPTE(current->End, sep), current->Text));
 		}
 	}
 
diff --git a/aegisub/src/subtitle_format_microdvd.cpp b/aegisub/src/subtitle_format_microdvd.cpp
index d91b1e0e4..f38091266 100644
--- a/aegisub/src/subtitle_format_microdvd.cpp
+++ b/aegisub/src/subtitle_format_microdvd.cpp
@@ -116,8 +116,8 @@ void MicroDVDSubtitleFormat::ReadFile(wxString const& filename, wxString const&
 			AssDialogue *line = new AssDialogue;
 			line->group = "[Events]";
 			line->Style = "Default";
-			line->Start.SetMS(fps.TimeAtFrame(f1, agi::vfr::START));
-			line->End.SetMS(fps.TimeAtFrame(f2, agi::vfr::END));
+			line->Start = fps.TimeAtFrame(f1, agi::vfr::START);
+			line->End = fps.TimeAtFrame(f2, agi::vfr::END);
 			line->Text = text;
 			Line->push_back(line);
 		}
@@ -146,8 +146,8 @@ void MicroDVDSubtitleFormat::WriteFile(wxString const& filename, wxString const&
 	// Write lines
 	for (std::list<AssEntry*>::iterator cur=Line->begin();cur!=Line->end();cur++) {
 		if (AssDialogue *current = dynamic_cast<AssDialogue*>(*cur)) {
-			int start = fps.FrameAtTime(current->Start.GetMS(), agi::vfr::START);
-			int end = fps.FrameAtTime(current->End.GetMS(), agi::vfr::END);
+			int start = fps.FrameAtTime(current->Start, agi::vfr::START);
+			int end = fps.FrameAtTime(current->End, agi::vfr::END);
 
 			file.WriteLineToFile(wxString::Format("{%i}{%i}%s", start, end, current->Text));
 		}
diff --git a/aegisub/src/subtitle_format_srt.cpp b/aegisub/src/subtitle_format_srt.cpp
index e4f27228e..2133bb9de 100644
--- a/aegisub/src/subtitle_format_srt.cpp
+++ b/aegisub/src/subtitle_format_srt.cpp
@@ -350,14 +350,12 @@ allparsed:
 	while (ms_chars < 3) ms *= 10, ms_chars++;
 	while (ms_chars > 3) ms /= 10, ms_chars--;
 
-	AssTime res;
-	res.SetMS(ms + 1000*(s + 60*(m + 60*(h + d*24))));
-	return res;
+	return ms + 1000*(s + 60*(m + 60*(h + d*24)));
 }
 
 wxString WriteSRTTime(AssTime const& ts)
 {
-	int time = ts.GetMS();
+	int time = ts;
 
 	int ms_part = time % 1000;
 	time /= 1000; // now holds seconds
diff --git a/aegisub/src/subtitle_format_transtation.cpp b/aegisub/src/subtitle_format_transtation.cpp
index 80efe6ed8..788ec5ceb 100644
--- a/aegisub/src/subtitle_format_transtation.cpp
+++ b/aegisub/src/subtitle_format_transtation.cpp
@@ -77,7 +77,7 @@ void TranStationSubtitleFormat::WriteFile(wxString const& filename, wxString con
 		AssDialogue *cur = dynamic_cast<AssDialogue*>(*it);
 
 		if (prev && cur) {
-			file.WriteLineToFile(ConvertLine(prev, &ft, cur->Start.GetMS()));
+			file.WriteLineToFile(ConvertLine(prev, &ft, cur->Start));
 			file.WriteLineToFile("");
 		}
 
@@ -118,10 +118,10 @@ wxString TranStationSubtitleFormat::ConvertLine(AssDialogue *current, Fractional
 	// Subtract one frame if the end time of the current line is equal to the
 	// start of next one, since the end timestamp is inclusive and the lines
 	// would overlap if left as is.
-	if (nextl_start > 0 && end.GetMS() == nextl_start)
-		end.SetMS(ft->FPS().TimeAtFrame(ft->FPS().FrameAtTime(end.GetMS(), agi::vfr::END) - 1, agi::vfr::END));
+	if (nextl_start > 0 && end == nextl_start)
+		end = ft->FPS().TimeAtFrame(ft->FPS().FrameAtTime(end, agi::vfr::END) - 1, agi::vfr::END);
 
-	wxString header = wxString::Format("SUB[%i%s%s ", valign, halign, type) + ft->FromAssTime(start) + ">" + ft->FromAssTime(end) + "]\r\n";
+	wxString header = wxString::Format("SUB[%i%s%s ", valign, halign, type) + ft->ToSMPTE(start) + ">" + ft->ToSMPTE(end) + "]\r\n";
 
 	// Process text
 	wxString lineEnd = "\r\n";
diff --git a/aegisub/src/subtitle_format_ttxt.cpp b/aegisub/src/subtitle_format_ttxt.cpp
index 08733e49a..d43fbaf71 100644
--- a/aegisub/src/subtitle_format_ttxt.cpp
+++ b/aegisub/src/subtitle_format_ttxt.cpp
@@ -102,8 +102,8 @@ void TTXTSubtitleFormat::ReadFile(wxString const& filename, wxString const& forc
 		AssDialogue *line = new AssDialogue();
 		line->group = "[Events]";
 		line->Style = "Default";
-		line->Start.SetMS(0);
-		line->End.SetMS(5000);
+		line->Start = 0;
+		line->End = 5000;
 		Line->push_back(line);
 	}
 }
@@ -127,8 +127,8 @@ bool TTXTSubtitleFormat::ProcessLine(wxXmlNode *node) {
 	if (!text.IsEmpty()) {
 		// Create dialogue
 		diag = new AssDialogue();
-		diag->Start.SetMS(time.GetMS());
-		diag->End.SetMS(36000000-10);
+		diag->Start = time;
+		diag->End = 36000000-10;
 		diag->group = "[Events]";
 		diag->Style = "Default";
 		diag->Comment = false;
@@ -297,8 +297,8 @@ void TTXTSubtitleFormat::ConvertToTTXT () {
 
 	// Insert blank line at the end
 	AssDialogue *diag = new AssDialogue();
-	diag->Start.SetMS(lastTime.GetMS());
-	diag->End.SetMS(lastTime.GetMS()+OPT_GET("Timing/Default Duration")->GetInt());
+	diag->Start = lastTime;
+	diag->End = lastTime+OPT_GET("Timing/Default Duration")->GetInt();
 	diag->group = "[Events]";
 	diag->Style = "Default";
 	diag->Comment = false;
diff --git a/aegisub/src/subtitle_format_txt.cpp b/aegisub/src/subtitle_format_txt.cpp
index ed39171be..408fd6ae7 100644
--- a/aegisub/src/subtitle_format_txt.cpp
+++ b/aegisub/src/subtitle_format_txt.cpp
@@ -117,13 +117,10 @@ void TXTSubtitleFormat::ReadFile(wxString const& filename, wxString const& encod
 
 		// Sets line up
 		AssDialogue *line = new AssDialogue;
-		line->group = "[Events]";
-		line->Style = "Default";
 		line->Actor = isComment ? "" : line->Actor;
 		line->Comment = isComment;
 		line->Text = value;
-		line->Start.SetMS(0);
-		line->End.SetMS(0);
+		line->End = 0;
 
 		// Adds line
 		Line->push_back(line);
@@ -133,10 +130,7 @@ void TXTSubtitleFormat::ReadFile(wxString const& filename, wxString const& encod
 	// No lines?
 	if (lines == 0) {
 		AssDialogue *line = new AssDialogue;
-		line->group = "[Events]";
-		line->Style = "Default";
-		line->Start.SetMS(0);
-		line->End.SetMS(OPT_GET("Timing/Default Duration")->GetInt());
+		line->End = OPT_GET("Timing/Default Duration")->GetInt();
 		Line->push_back(line);
 	}
 }
diff --git a/aegisub/src/threaded_frame_source.cpp b/aegisub/src/threaded_frame_source.cpp
index 2f4454d25..bbdd9ed7f 100644
--- a/aegisub/src/threaded_frame_source.cpp
+++ b/aegisub/src/threaded_frame_source.cpp
@@ -55,7 +55,7 @@ struct invisible_line : public std::unary_function<const AssEntry*, bool> {
 	invisible_line(double time) : time(time * 1000.) { }
 	bool operator()(const AssEntry *entry) const {
 		const AssDialogue *diag = dynamic_cast<const AssDialogue*>(entry);
-		return diag && (diag->Start.GetMS() > time || diag->End.GetMS() <= time);
+		return diag && (diag->Start > time || diag->End <= time);
 	}
 };
 
diff --git a/aegisub/src/timeedit_ctrl.cpp b/aegisub/src/timeedit_ctrl.cpp
index faf88ad0c..377b9570f 100644
--- a/aegisub/src/timeedit_ctrl.cpp
+++ b/aegisub/src/timeedit_ctrl.cpp
@@ -96,9 +96,9 @@ TimeEdit::TimeEdit(wxWindow* parent, wxWindowID id, agi::Context *c, const wxStr
 	Bind(wxEVT_COMMAND_MENU_SELECTED, std::tr1::bind(&TimeEdit::PasteTime, this), Time_Edit_Paste);
 }
 
-void TimeEdit::SetMS(int ms) {
-	if (ms != time.GetMS()) {
-		time.SetMS(ms);
+void TimeEdit::SetTime(AssTime new_time) {
+	if (time != new_time) {
+		time = new_time;
 		UpdateText();
 	}
 }
@@ -125,7 +125,7 @@ void TimeEdit::OnModified(wxCommandEvent &event) {
 
 void TimeEdit::UpdateText() {
 	if (byFrame)
-		ChangeValue(wxString::Format("%d", c->videoController->FrameAtTime(time.GetMS(), isEnd ? agi::vfr::END : agi::vfr::START)));
+		ChangeValue(wxString::Format("%d", c->videoController->FrameAtTime(time, isEnd ? agi::vfr::END : agi::vfr::START)));
 	else
 		ChangeValue(time.GetASSFormated());
 }
diff --git a/aegisub/src/timeedit_ctrl.h b/aegisub/src/timeedit_ctrl.h
index fb995cec1..29cd9cbc8 100644
--- a/aegisub/src/timeedit_ctrl.h
+++ b/aegisub/src/timeedit_ctrl.h
@@ -75,12 +75,7 @@ public:
 	/// Get the current time as an AssTime object
 	AssTime GetTime() const { return time; }
 	/// Set the time
-	void SetTime(AssTime time) { SetMS(time.GetMS()); }
-
-	/// Get the current time as milliseconds
-	int GetMS() const { return time.GetMS(); }
-	/// Set the time to the specified milliseconds
-	void SetMS(int ms);
+	void SetTime(AssTime time);
 
 	/// Set whether the time is displayed as a time or the corresponding frame number
 	/// @param enableByFrame If true, frame numbers are displayed
diff --git a/aegisub/src/video_box.cpp b/aegisub/src/video_box.cpp
index 70ab65f69..aa2f91f65 100644
--- a/aegisub/src/video_box.cpp
+++ b/aegisub/src/video_box.cpp
@@ -185,8 +185,8 @@ void VideoBox::UpdateTimeBoxes() {
 	else {
 		VideoSubsPos->SetValue(wxString::Format(
 			"%+dms; %+dms",
-			time - active_line->Start.GetMS(),
-			time - active_line->End.GetMS()));
+			time - active_line->Start,
+			time - active_line->End));
 	}
 
 }
diff --git a/aegisub/src/video_context.cpp b/aegisub/src/video_context.cpp
index d4a74b61d..0676273af 100644
--- a/aegisub/src/video_context.cpp
+++ b/aegisub/src/video_context.cpp
@@ -352,13 +352,13 @@ void VideoContext::PlayLine() {
 
 	// Start playing audio
 	context->audioController->PlayRange(SampleRange(
-		context->audioController->SamplesFromMilliseconds(curline->Start.GetMS()),
-		context->audioController->SamplesFromMilliseconds(curline->End.GetMS())));
+		context->audioController->SamplesFromMilliseconds(curline->Start),
+		context->audioController->SamplesFromMilliseconds(curline->End)));
 
 	// Round-trip conversion to convert start to exact
-	int startFrame = FrameAtTime(context->selectionController->GetActiveLine()->Start.GetMS(),agi::vfr::START);
+	int startFrame = FrameAtTime(context->selectionController->GetActiveLine()->Start,agi::vfr::START);
 	startMS = TimeAtFrame(startFrame);
-	endFrame = FrameAtTime(context->selectionController->GetActiveLine()->End.GetMS(),agi::vfr::END) + 1;
+	endFrame = FrameAtTime(context->selectionController->GetActiveLine()->End,agi::vfr::END) + 1;
 
 	// Jump to start
 	JumpToFrame(startFrame);
diff --git a/aegisub/src/visual_tool.cpp b/aegisub/src/visual_tool.cpp
index f09045977..ea5b0df66 100644
--- a/aegisub/src/visual_tool.cpp
+++ b/aegisub/src/visual_tool.cpp
@@ -134,8 +134,8 @@ bool VisualToolBase::IsDisplayed(AssDialogue *line) const {
 	int frame = c->videoController->GetFrameN();
 	return
 		line &&
-		c->videoController->FrameAtTime(line->Start.GetMS(), agi::vfr::START) <= frame &&
-		c->videoController->FrameAtTime(line->End.GetMS(), agi::vfr::END) >= frame;
+		c->videoController->FrameAtTime(line->Start, agi::vfr::START) <= frame &&
+		c->videoController->FrameAtTime(line->End, agi::vfr::END) >= frame;
 }
 
 void VisualToolBase::Commit(wxString message) {
diff --git a/aegisub/src/visual_tool_drag.cpp b/aegisub/src/visual_tool_drag.cpp
index a1c794823..e766c737b 100644
--- a/aegisub/src/visual_tool_drag.cpp
+++ b/aegisub/src/visual_tool_drag.cpp
@@ -87,8 +87,8 @@ void VisualToolDrag::OnSubTool(wxCommandEvent &) {
 		else {
 			p1 = GetLinePosition(line);
 			// Round the start and end times to exact frames
-			int start = vc->TimeAtFrame(vc->FrameAtTime(line->Start.GetMS(), agi::vfr::START)) - line->Start.GetMS();
-			int end = vc->TimeAtFrame(vc->FrameAtTime(line->Start.GetMS(), agi::vfr::END)) - line->Start.GetMS();
+			int start = vc->TimeAtFrame(vc->FrameAtTime(line->Start, agi::vfr::START)) - line->Start;
+			int end = vc->TimeAtFrame(vc->FrameAtTime(line->Start, agi::vfr::END)) - line->Start;
 			SetOverride(line, "\\move", wxString::Format("(%s,%s,%d,%d)", p1.Str(), p1.Str(), start, end));
 		}
 	}
@@ -255,7 +255,7 @@ bool VisualToolDrag::InitializeDrag(feature_iterator feature) {
 	// Set time of clicked feature to the current frame and shift all other
 	// selected features by the same amount
 	if (feature->type != DRAG_ORIGIN) {
-		int time = c->videoController->TimeAtFrame(frame_number) - feature->line->Start.GetMS();
+		int time = c->videoController->TimeAtFrame(frame_number) - feature->line->Start;
 		int change = time - feature->time;
 
 		for (sel_iterator cur = sel_features.begin(); cur != sel_features.end(); ++cur) {