Throw an error if the first chapter does not start at 0:00:00

rexim · rexim · commit d0eebbfcdb1a · 2025-08-23T23:52:52.000+07:00
diff --git a/markut.go b/markut.go
@@ -547,6 +547,14 @@ func (context *EvalContext) finishEval() bool {
 		}
 	}
 
+	if len(context.chapters) > 0 {
+		first := context.chapters[0]
+		if first.Timestamp > 0 {
+			fmt.Printf("%s: ERROR: first chapter must start at 0:00:00 of the output video. But this one starts at %s (See https://support.google.com/youtube/answer/9884579)\n", first.Loc, millisToTs(first.Timestamp));
+			return false
+		}
+	}
+
 	if len(context.argsStack) > 0 || len(context.chapStack) > 0 {
 		for i := range context.argsStack {
 			fmt.Printf("%s: ERROR: unused argument\n", context.argsStack[i].Loc)

Original file line number	Diff line number	Diff line change
`@@ -547,6 +547,14 @@ func (context *EvalContext) finishEval() bool {`
`547`	`547`	`}`
`548`	`548`	`}`
`549`	`549`
	`550`	`+ if len(context.chapters) > 0 {`
	`551`	`+ first := context.chapters[0]`
	`552`	`+ if first.Timestamp > 0 {`
	`553`	`+ fmt.Printf("%s: ERROR: first chapter must start at 0:00:00 of the output video. But this one starts at %s (See https://support.google.com/youtube/answer/9884579)\n", first.Loc, millisToTs(first.Timestamp));`
	`554`	`+ return false`
	`555`	`+ }`
	`556`	`+ }`
	`557`	`+`
`550`	`558`	`if len(context.argsStack) > 0 \|\| len(context.chapStack) > 0 {`
`551`	`559`	`for i := range context.argsStack {`
`552`	`560`	`fmt.Printf("%s: ERROR: unused argument\n", context.argsStack[i].Loc)`