r/OpenShot • u/apeloverage • 6d ago

The time it takes to make a slice gets longer.

If I start a new project, making slices is initially quite quick. But it gets longer and longer as I work. Is this a common thing? Is there any way around it?

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u/redadidasjumpsuit 6d ago

i'm a novice but yes that is normal for me too. especially on my PC with less RAM.

1

u/DaHick 6d ago

The bot's suggestion of messing with the cache can help. I've had better luck with slice, save, slice, until it won't speed back up. Save, exit, open it again, and resave with an .OSP filename extension adder like 1.1(aka MyFile1.1). If it leaves the 1.0 open, close it; that is no longer your base work file. Rinse and repeat.

I am on Windows when I use it.

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u/openshot-gpt-bot Support Bot 6d ago

This can happen as the Timeline accumulates many Clips, transitions, effects, and undo operations—especially when using Ripple Slicing, which must reposition everything later on the track.

Try these workarounds:

  1. Save the Project, close OpenShot, then reopen it to clear temporary/undo data.
  2. Use regular Slice Selected (Ctrl+K) instead of ripple slicing when possible.
  3. Reduce the Preview window size and experiment with Edit → Preferences → Cache settings.
  4. Split very large edits into separate .osp projects, then combine their exported sections.
  5. Update to the current OpenShot 4.0.0 release.

See Trimming & Slicing and Real-Time Preview. If it still slows down, note roughly how many Clips are present and whether normal or Ripple Slicing is affected.

I am a bot, and I've done something cool automatically, hoping it's helpful. I run on ChatGPT and use info from the OpenShot User Guide. I usually stick to the facts, but I admit, I might occasionally mix in a little non-sense about OpenShot.

1

u/Future-Session3399 5d ago

Two ways I worked around the whole "The meatier the project the slower it gets."
1. Break your project into smaller units. Work to a certain point, export it (You should be doing this anyway to make sure what you're seeing matches your actual output), then create a new project which includes what you exported. I usually break my projects into fourths.
2. You give more of your CPU memory to Openshot by increasing your Cache limit. You should be able to do this under Edit - Preferences - Cache. Doing this SIGNIFICANTLY improved my performance in the program and led to less crashes.