---
title: "start(_:ofImageParameter:)"
framework: Professional Video Applications
role: symbol
role_heading: Instance Method
platforms: [fxplug 4.0+]
path: "professional_video_applications/fxtimingapi_v4/start(_:ofimageparameter:)"
---

# start(_:ofImageParameter:)

Provides the start time of the clip the user assigned to the given image parameter for the effect.

## Declaration

```swift
func start(_ startTime: UnsafeMutablePointer<CMTime>!, ofImageParameter parameterID: UInt32)
```

## Parameters

- `startTime`: The start time of the clip, in CMTime.
- `parameterID`: The ID of the image parameter.

## Discussion

Discussion In Motion, startTime represents the native start time of the image well input, relative to timeline time.

## See Also

### Accessing Timing Values

- [frameDuration(_:)](professional_video_applications/fxtimingapi_v4/frameduration(_:).md)
- [sampleDuration(_:)](professional_video_applications/fxtimingapi_v4/sampleduration(_:).md)
- [startTime(forEffect:)](professional_video_applications/fxtimingapi_v4/starttime(foreffect:).md)
- [durationTime(forEffect:)](professional_video_applications/fxtimingapi_v4/durationtime(foreffect:).md)
- [startTimeOfInput(toFilter:)](professional_video_applications/fxtimingapi_v4/starttimeofinput(tofilter:).md)
- [durationTimeOfInput(toFilter:)](professional_video_applications/fxtimingapi_v4/durationtimeofinput(tofilter:).md)
- [durationTime(_:ofImageParameter:)](professional_video_applications/fxtimingapi_v4/durationtime(_:ofimageparameter:).md)
- [inPointTimeOfTimeline(forEffect:)](professional_video_applications/fxtimingapi_v4/inpointtimeoftimeline(foreffect:).md)
- [outPointTimeOfTimeline(forEffect:)](professional_video_applications/fxtimingapi_v4/outpointtimeoftimeline(foreffect:).md)
- [timelineTime(_:fromInputTime:)](professional_video_applications/fxtimingapi_v4/timelinetime(_:frominputtime:).md)
- [timelineTime(_:fromImageTime:forParameterID:)](professional_video_applications/fxtimingapi_v4/timelinetime(_:fromimagetime:forparameterid:).md)
- [inputTime(_:fromTimelineTime:)](professional_video_applications/fxtimingapi_v4/inputtime(_:fromtimelinetime:).md)
- [imageTime(_:forParameterID:fromTimelineTime:)](professional_video_applications/fxtimingapi_v4/imagetime(_:forparameterid:fromtimelinetime:).md)
- [fieldOrderForInput(toFilter:)](professional_video_applications/fxtimingapi_v4/fieldorderforinput(tofilter:).md)
- [timelineFpsNumerator(for:)](professional_video_applications/fxtimingapi_v4/timelinefpsnumerator(for:).md)