Question

我得到QTMovieView的当前时间，如此：

QTTime time = self.movieView.movie.currentTime;

然后将其放入SMPTE表格

NSString *SMPTE_string;
int days, hour, minute, second, frame;
long long result;

result = time.timeValue / time.timeScale; // second
frame = (time.timeValue % time.timeScale) / 100;

second = result % 60;

result = result / 60; // minute
minute = result % 60;

result = result / 60; // hour
hour = result % 24;

days = result;

SMPTE_string = [NSString stringWithFormat:@"%02d:%02d:%02d:%02d", hour, minute, second, frame]; // hh:mm:ss:ff

但我不想让它以帧号结束。我希望它以毫秒结束（hh：mm：ss.mil）

Answer 1

以下内容应该有效：

double second = (double)time.timeValue / (double)time.timeScale;
int result = second / 60;
second -= 60 * result;
int minute = result % 60;
result = result / 60;
int hour = result % 24;
int days = result / 24;

NSString *SMPTE_string = [NSString stringWithFormat:@"%02d:%02d:%06.3f", hour, minute, second];

秒数计算为double而不是int，然后打印使用%06.3f格式以毫秒精度。

（请注意，代码中的days = result不正确。）

如果您更喜欢整数运算，那么您也可以计算毫秒数 QTTime time与

long long milli = (1000 * (time.timeValue % time.timeScale)) / time.timeScale;

使用QTTime以毫秒为单位

1 个答案: