导出具有自定义CMTimeRange问题的视频

Question

我想我错过了什么。我有一个滑块，可以更改资产持续时间和开始时间。如果我导出具有完整持续时间的视频，则为

 let timeRange = originalVideoTrack.timeRange
        do {
            try videoTrack.insertTimeRange(timeRange, ofTrack: originalVideoTrack, atTime: kCMTimeZero)
        } catch {
        }

一切正常。但是如果我尝试插入我的自定义持续时间，因为

 let startTime = CMTimeMake(Int64(CMTimeGetSeconds(videoRangeSlider.timeRange.start) * 1000)   , 1000)
        let dura = CMTimeGetSeconds(videoRangeSlider.timeRange.end) - CMTimeGetSeconds(videoRangeSlider.timeRange.start)
let duration = CMTimeMake( Int64(dura * 1000)  , 1000)
t timeRange = CMTimeRangeMake(startTime,duration)
 originalVideoTrack.timeRange
        do {
                try videoTrack.insertTimeRange(timeRange, ofTrack: originalVideoTrack, atTime: timeRange.start)
        } catch {
            print("problem")
        }

我也已将atTime更改为kCGTimeZero，不起作用

有什么建议吗？

更新

示例时间范围

CMTimeRange(start: __C.CMTime(value: 2216, timescale: 1000, flags: __C.CMTimeFlags(rawValue: 1), epoch: 0), duration: __C.CMTime(value: 2880, timescale: 1000, flags: __C.CMTimeFlags(rawValue: 1), epoch: 0))

Answer 1

已解决。享受

插入完整时间范围为

 let timeRange = originalVideoTrack.timeRange
        do {
            try videoTrack.insertTimeRange(timeRange, ofTrack: originalVideoTrack, atTime: kCMTimeZero)
        } catch {
        }

并且，为了您的customRange，请执行以下操作

    exportSession?.timeRange = customRange