Playback Speed Adjustment

Note

  • When the playback speed of clips is changed, ancillary data will be deleted.

Changing the Speed of the Whole Clip

You can change the playback speed of clips.

1) Right-click a clip, and click [Time Effect] → [Speed].

Alternative

2) Set each item and click [OK].

Note

  • The playback speed cannot be changed for split trimmed clips on the VA track. To change the speed, unlink the clip.

    Split Trim

    Unlinking Clips

[Speed] Dialog Box

(1)

[Speed]

[Direction]

Select the playback direction of the clips.

[Rate]

Enter the ratio to the original speed (100%).

Since the speed is changed referenced to the In point, when [Change the Clip Duration on Timeline] is unchecked, the upper limit of Rate that can be entered changes according to the margin on the Out point side of the source clip. When there is no margin on the Out point side, a Rate greater than 100% cannot be entered.

(2)

[Change the Clip Duration on Timeline]

Check this item to change the duration of clips on the timeline according to the speed (value of [Rate]) of the clip. The duration of the clip can be entered at [Duration] to change the speed. When this item is unchecked, the speed can be changed without changing the duration of the clip on the timeline.

(3)

[Field Option]

The [Field Option] dialog box appears.

[Field Option] Dialog Box

Partially Changing Playback Speed (Time Remap)

You can alter the speed of any part of a clip.

You can remap a particular frame of a clip to a different position of the timeline. The remaining frames are automatically interpolated, and as a result the speed of the previous/next frames is changed. The In point of a clip, the frame of the Out point and the overall length remain unchanged.

1) Right-click a clip, and click [Time Effect] → [Time Remap].

Alternative

2) Drag the timeline cursor.

3) Click [Add Key / Delete] at the position to add a key.

Alternative

4) Move the mouse cursor over the key, and drag to the left or right.

Alternative

5) Click [Playback] or [Loop Playback] to check the video.

[Time Remap] Dialog Box

(1)

Key frame edit buttons

: Add a key at the position of the timeline cursor. If a key is placed at the position of the timeline cursor, the key is deleted.

Add: [Insert], [V]

Delete: [Delete]

: Move the timeline cursor to the previous key.

[Page up], [A], [Ctrl] + [←]

: Move the timeline cursor to the next key.

[Page down], [S], [Ctrl] + [→]

: Play back the clip from the position of the timeline cursor to the end of the clip. When it is clicked during playback, playback pauses.

: Repeatedly play back the clip. When it is clicked during playback, playback pauses.

(2)

[Initialize]

Click [Initialize] and click [Yes] to delete all added keys and restore the defaults.

(3)

Timecode (Timeline)

Directly enter the value to specify which place on the timecode of the timeline the key at the timeline cursor position is to be placed. The timecode is displayed when the timeline cursor is moved to the key.

(4)

Timecode (Clip)

Directly enter the value to specify which place on the timecode of the clip the key at the timeline cursor position is to be placed.

(5)

Key setting field

This space is used for setting the key. A green line is displayed at parts where the speed has not been changed.

(6)

Time difference display area

This space displays the values of the time difference that occurs when keys are added as a connected line.

(7)

Clips

Display the line connecting the key and the corresponding frame on a position on the clip.

(8)

[Field Option]

The [Field Option] dialog box appears.

[Field Option] Dialog Box

(9)

[Full Range]

Display all margin sections of the clip. Checking this item when trimming or a cut operation has been performed after setting the time remap can display the keys of the cut section.

(10)

[Enable]

Switch the enable/disable setting for the time remap setting. Uncheck this item to disable the setting.

One Frame at a Time Playback (Freeze Frame)

Stop and play back the In or Out points of the clip. Clips can be stopped for not just the length of the clip but also the first half or second half from a desired frame.

Note

  • Freeze frame can be set to video clips on the timeline.

  • The freeze frame setting is deleted when a clip set with a freeze frame is added from the timeline to the bin.

1) Right-click a clip, and click [Time Effect] → [Freeze Frame] → [Setup].

Alternative

2) Check [Enable freeze frame] in the [Freeze Frame] dialog box.

3) Select the fix position, and click [OK].

Freeze-framing the First Half or Second Half from a Desired Frame

1) Move the timeline cursor to the frame to freeze.

2) Right-click a clip, and click [Time Effect] → [Freeze Frame] → [Before Cursor] or [After Cursor].

Alternative

Note

  • Freeze frame cannot be set when the timeline cursor is located at a transition between clips.

Field Options

You can set processing options for reducing flicker, for example, when slow motion has been set.

1) Select a clip.

2) Click [Clip] on the menu bar, and click [Time Effect] → [Field Option].

Alternative

3) Set each item and click [OK].

[Field Option] Dialog Box

(1)

[Interpolation Method]

[Nearest neighbor]

The length of the clip is adjusted by skipping frames or continuously displaying the same frame.

[Frame blending]

Adjacent frames are composed and a new frame is automatically generated to interpolate between the frames.

[Optical flow]

The motion in adjacent frames are analyzed by pixels and a new frame is automatically generated so that the motion of the subject is played back smoothly.

Click the list button to set the quality of [Optical flow].

Select [Custom] to set [Advanced Matching] and [Accuracy] separately.

  • [Advanced Matching]

    Use [Advanced Matching] that analyzes detailed matching between images to recognize more detailed characteristics, which will separate the foreground and background sharply.

    Enabling [Advanced Matching] may cause specific artifacts. If it happens, uncheck [Advanced Matching].

    Optical flow

  • [Accuracy]

    Set the accuracy of analysis.

    Accuracy of analysis can be selected from four levels from [Low] to [High]. Higher accuracy will take more time for analysis, but decreases smoky artifacts specific to the optical flow.

(2)

[Processing Option]

Set the processing option to reduce flicker during slow motion. Set [Deinterlace when speed is below 100%] when video is affected by the scanning line and flickers when a slower playback speed has been set.

(3)

[Save as default]

Click this item to save the current settings as defaults. When a clip is placed on the timeline, the default [Field Option] is always applied.

High-Quality Slow Motion

By applying optical flow, an image interpolation technique, the video can be converted into a slow motion video with higher quality and smoother motion when the clip playback speed has been decreased due to setting change in [Speed] of [Time Effect].

Optical flow

Optical flow is a technique to generate new images to interpolate between images, by analyzing subtle motion between images and estimating spatially smooth motion. It enables to realize high-quality slow motion and smooth frame conversion.

Note

  • For video like the following, high-quality slow motion effects may not be fully obtained.

    • Video with extremely high speed and long distance movement

    • Video in which subjects cross each other

    • Video that includes a building window, fence, or regular pattern like a horizontal striped T shirt

      Enabling [Advanced Matching] for [Optical flow] may cause specific artifacts.

    After applying high-quality slow motion, play back the video to check if the subject is mixed with the background or the images are distorted.

1) Right-click a clip on the timeline, and click [Time Effect] → [Speed].

2) Set each item.

3) Click [Field Option].

4) Select [Optical flow] for [Interpolation Method], and click the list button to set the quality.

5) Click [OK].

6) Click [OK].

 To Top 
EDIUS World Home Where to Buy Try EDIUS 9 Support Manual FAQ
Copyright © 2018 Grass Valley Canada. All rights reserved.
Join the Conversation: Grass Valley on Facebook Grass Valley on Twitter Grass Valley on Youtube