first

go.mod

@@ -0,0 +1,3 @@
+module git.sr.ht/~statianzo/timeshift
+
+go 1.14

main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"time"
+)
+
+func main() {
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if len(line) < 9 {
+			fmt.Print("\n")
+		} else {
+			timestamp := line[0:9]
+			rest := line[9:]
+			parsed, err := time.Parse("0:04:05.0", timestamp)
+			if err != nil {
+				panic(err)
+			}
+			incremented := parsed.Add(11 * time.Second)
+			fmt.Printf("%s%s\n", incremented.Format("0:04:05.0"), rest)
+		}
+	}
+}