some clips turned black and it's spreading?

I have a clip where I adjusted the playing speed in the “properties” section and since then the view is gone. It still has sound (which is useless since that’s the part I’m not using) but it just shows a black screen.

I already checked the forum and it’s not a filter (don’t have any funnels whatsoever) the only other thing that seemed similar talks about turning off proxy? but I have no idea what that means.

extra annoying is that some other clips around the original troublemaker have the same issue now and saving, shutting down the program and re-opening doesn’t fix it.

Select an affected clip and go to Properties > Video > Track. It should not say None.

It doesn’t say none ¯_(ツ)_/¯

oh and I took the screenshot before updating shortcut. after the update it still wasn’t solved, but it also doesn’t say “none” at the track

@Nele_Tulpin
Sur votre capture d’écran, la fenêtre propriétés correspond au clip sélectionné au bout de la timeline, alors que l’écran noir correspond au clip sous la playhead.

In your screenshot, the properties window corresponds to the selected clip at the end of the timeline, while the black screen corresponds to the clip below the playhead.

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Oh very good point! thanks for pointing it out ^_^. Took a new screenshot

Your video file is not cooperating with speed changes and needs to be converted. See how it says “(variable)” in the Frame rate row in Properties. At some point Shotcut warned you that editing variable frame rate video is not a good idea.

ok, so how do I convert it, and to what ?
Can’t remember a warning though :thinking:

There is a Convert button in your screenshot, in the Properties panel. Choose the default option.

You will not get a warning if some time in the past you told it to stop warning you. Otherwise, when that “(variable)” appears you normally get a warning like this

Notice the check box in the bottom left corner.

If you had dropped multiple files into Shotcut you get a warning like this:

…unless that checkbox has been clicked.

I haven’t checked that box, but I only started getting those types of warnings after the update, and this problem started before the update. Guess it must’ve gone wrong partly cause I hadn’t updated in so long.
Anyway, thanks for the explanation!

The update has nothing to do with it; this warning has been there for years. The problem with seeking reliably, which is needed for many things in editing, has always existed and will always exist.