1.获取音频毫秒长度
AVURLAsset *audioAsset=[AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:[self.dic getStringValueForKey:@"path" defaultValue:@""] ]options:nil];
CMTime audioDuration = audioAsset.duration;
float audioDurationSeconds = CMTimeGetSeconds(audioDuration);
2.获取音视频总秒数
NSDictionary *opts = [NSDictionary dictionaryWithObject:@(NO) forKey:AVURLAssetPreferPreciseDurationAndTimingKey];
AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:[self.dic getStringValueForKey:@"path" defaultValue:@"" ]] options:opts]; // 初始化视频媒体文件
NSUInteger second = 0;
second = ceil(urlAsset.duration.value / urlAsset.duration.timescale); // 获取视频总时长,单位秒
