Made precise ASS timings a setting

ass/line/line.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"git.gammaspectra.live/WeebDataHoarder/swf2ass-go/ass/tag"
 	asstime "git.gammaspectra.live/WeebDataHoarder/swf2ass-go/ass/time"
+	"git.gammaspectra.live/WeebDataHoarder/swf2ass-go/settings"
 	"git.gammaspectra.live/WeebDataHoarder/swf2ass-go/types"
 	"git.gammaspectra.live/WeebDataHoarder/swf2ass-go/types/shapes"
 	"regexp"
@@ -123,10 +124,12 @@ func (l *EventLine) Encode(frameDuration time.Duration) string {
 
 	text := make([]string, 0, 1+len(l.Tags))
 
-	eventTimeTags := eventTime.Encode()
+	if settings.GlobalSettings.ASSPreciseTiming {
+		eventTimeTags := eventTime.Encode()
 
-	if len(eventTimeTags) > 0 {
-		text = append(text, eventTimeTags)
+		if len(eventTimeTags) > 0 {
+			text = append(text, eventTimeTags)
+		}
 	}
 
 	for _, t := range l.Tags {

ass/time/time.go

@@ -118,7 +118,6 @@ func (t EventTime) GetDurationFromEndOffset(frameOffset int64) time.Duration {
 func (t EventTime) Encode() string {
 	if t.Start.AdjustedMillisecondError != 0 || t.End.AdjustedMillisecondError != 0 {
 		//Adjust frame precision exactly to frame boundaries. This is necessary due to low ASS timing precision
-		//TODO: Maybe use fade?
 		frameStartTime := t.GetDurationFromStartOffset(0).Milliseconds()
 		frameEndTime := t.GetDurationFromEndOffset(0).Milliseconds()
 		//TODO: maybe needs to be -1?

settings/Settings.go

@@ -8,6 +8,11 @@ type Settings struct {
 	// Note that at high ASSDrawingScale >= 5 this will be brought down to 0 regardless
 	ASSDrawingPrecision int
 
+	// ASSPreciseTiming Enables precise timing via \fade transitions for each event.
+	// libass is only precise to 1/100th of a second, causing issues with higher framerate content
+	// Additionally extra \err annotations will be placed to note the current error adjusted
+	ASSPreciseTiming bool
+
 	// VideoRateMultiplier Adjusts the viewport scale. All operations and transforms will be adjusted accordingly
 	// For example, VideoScaleMultiplier = 2 will make a 640x480 viewport become 1280x960
 	VideoScaleMultiplier float64
@@ -49,6 +54,7 @@ const DefaultASSDrawingPrecision = 2
 var GlobalSettings = Settings{
 	ASSDrawingScale:      DefaultASSDrawingScale,
 	ASSDrawingPrecision:  DefaultASSDrawingPrecision,
+	ASSPreciseTiming:     true,
 	VideoScaleMultiplier: 1,
 	VideoRateMultiplier:  1,