How to Change lenght in bulk

Hi,

In CapCut, changing the length (duration) of multiple images in bulk is unfortunately not directly possible without affecting the existing transitions and animations — especially once the images are already placed on the timeline with effects applied. However, here's a clear explanation of your options and a workaround:

Here's a breakdown of methods available in CapCut and their potential impact on your project:

1. Changing the Default Image Duration (Before Importing):

CapCut allows you to set a default duration for still images before you import them into a project.

• How to do it (General steps, exact location might vary slightly by CapCut version):

  • Go to your CapCut settings or preferences.
  • Look for an "Edit" or "Project" tab.
  • Find the "Image Duration" setting and set your desired length.
  • Save the settings.
  • Then, import your photos into a new project.

• Impact on your project: This method only applies to images imported after changing the setting. It will not affect the 400 photos already in your existing project with animations and transitions.

2. Selecting Multiple Images on the Timeline and Dragging:

You can select multiple clips on the timeline (e.g., by clicking and dragging a box around them or using keyboard shortcuts like Ctrl+A or Cmd+A to select all) and then drag the edge of one of the selected clips to uniformly change the duration of all of them.

• How to do it:

  • In your project timeline, select the 400 photos.
  • Click and drag the right edge of the last selected image or the beginning edge of the first selected image.
  • All selected images should change duration proportionally.

• Impact on your project: While this changes the duration of all selected clips at once, its effect on complex, individual animations and transitions is uncertain and likely problematic.

• Animations and transitions are often timed and positioned based on the original clip duration. Stretching or shrinking the clip might distort or misalign these effects.

• Basic fades or simple transitions might adapt, but more intricate keyframed animations on individual images are unlikely to be preserved correctly.

3. Exporting and Speed Adjustment (Not Recommended for Preserving Individual Effects):

You can try exporting the current project as a video, then re-importing the video into a new project and using the speed adjustment to change the overall playback time.

• Impact on your project: This will change the duration of the entire sequence of images, but it will treat the whole sequence as one video clip.
• All your carefully applied individual animations and transitions will be baked into the video and will speed up or slow down along with the images, likely ruining their intended effect.

4. CapCut's "Batch Edit" Feature:

CapCut's "Batch Edit" feature is primarily designed for applying basic edits (like resizing) to multiple images before they are brought into the video timeline. It is not a tool for bulk duration changes or for modifying clips already in a project with effects.

Current Limitations:

• CapCut does not have a built-in feature to batch change durations for images that are already placed on the timeline.

• If you change the duration of an image manually, it will shift all items that come after it, potentially messing up your transitions and keyframes.

• Transitions are usually linked to the timing and position between clips, so if you change duration, they may auto-adjust or get removed.

Workarounds for already edited timeline:

If your timeline is already fully edited with transitions and animations, and you still want to bulk adjust durations:

Workaround Strategy: Use Speed Control Carefully (Not Ideal, but Possible)

• CapCut PC version lets you speed up or slow down a clip — this technically changes its duration without needing to trim.
• But for static images, speed controls don’t apply. So this trick won't work here.

Recommended Solution: Rebuild with Shorter Duration via "Replace" Function

Here’s a safer method using the Replace function to keep transitions and animations intact while adjusting image durations one by one (semi-automatic process):

Step-by-Step:

1. Open your project.

2. Select the first image on the timeline.

3. Click on “Replace” from the right-click menu or toolbar (in CapCut PC).

4. Choose the same image file again.

5. Before confirming, change its duration to your new desired value (e.g., from 7s to 3s).

6. CapCut will keep the existing animation and transition, but adjust the duration if you do it precisely before applying any edits to the new image.

7. Repeat for the rest — while it’s still manual, it’s less destructive than re-importing everything.

Alternative solution before Adding to Timeline:

If you haven’t added the images to the timeline yet:

Set Default Photo Duration:

1. Go to CapCut settings.

2. Look for “Default photo duration”.

3. Set it to your new desired length (e.g., 3 seconds).

4. Then import all 400 photos — they will be placed with the new length automatically.

Be careful:

• Don’t drag to resize each photo one by one after transitions and keyframes have been applied — this will break things.

• Don’t “Select All” and change duration — this option doesn’t exist in CapCut as of now.

If this is a repeating workflow, consider doing:

• Pre-timed image sets in folders.

• A base template with animation presets but without fixed duration.

Conclusion:

Given that you have 400 photos with existing animations and transitions, there is no simple one-click solution in CapCut to change the duration of all of them simultaneously while perfectly preserving all your applied effects.

The most reliable way to achieve this while keeping your animations and transitions intact would likely involve:

• Manually adjusting the duration of each image: This is time-consuming with 400 photos but guarantees that you can readjust or verify the animations and transitions for each image individually after changing its length.
• Strategically using the "select and drag" method: If your animations and transitions are relatively simple and consistent across images, you could try selecting groups of images and dragging to adjust duration. However, be prepared to manually fine-tune or re-apply animations and transitions on many of the clips afterward.

For a project of this scale with existing complex edits, it highlights a limitation in CapCut's bulk editing capabilities for timeline elements with individual effects.

You might need to weigh the time saved by attempting a bulk change against the potential effort required to fix or re-do animations and transitions.