public static int durationStringLongToMs(String input) {
        String[] parts = input.split(":");
        if (parts.length != 3) {
            return 0;
        }
        return Integer.parseInt(parts[0]) * 3600 * 1000
                + Integer.parseInt(parts[1]) * 60 * 1000
                + Integer.parseInt(parts[2]) * 1000;
    }
@Test
    public void testDurationStringLongToMs() {
        String input = "01:20:30";
        long expected = 4830000;
        assertEquals(expected, Converter.durationStringLongToMs(input));
    }