Bug ID: 368984
           Summary: Removing "dissolve" crashes Kdenlive
           Product: kdenlive
           Version: 16.04.0
          Platform: Ubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: Effects & Transitions

I hope the video I posted at:

is self-explanatory.

This bug is intermittent but fairly easy for me to reproduce. I hope it is easy
for you guys to reproduce.

In essence when I have two videos that overlap in the timeline, when I use a
“dissolve” transition so that it exactly corresponds to the time which the two
videos overlap, then Kdenlive works properly. By “properly” I mean that
Kdenlive will transition properly from the first video to the second video
which it overlaps.

However, when I *remove* the “dissolve” transition, sometimes but not always,
Kdenlive will crash as it transitions from the first video to the second video
which it overlaps. I would estimate in this case (when I have removed the
“dissolve” transition), Kdenlive crashes perhaps 25% of the time for me.
Therefore, it might take me a minute or two to reproduce this bug. Also, when
trying to reproduce the bug I find it is helpful to close the file in Kdenlive
and then reopen it.

In other words, I have found that simply playing the transition from the first
video to the second video which it overlaps without the “dissolve” transition
over and over again will sometimes fail to reproduce the bug. Therefore, if you
are unable to reproduce the bug please try closing the file, then reopening it,
and then playing the first video to the second video which it overlaps without
the “dissolve” transition.

I'm running Kdenlive Version 16.04.3 which I installed from the Synaptic
Package Manager on an Xubuntu derivative called GalliumOS 2.0 on a Acer C720
Chromebook with 4gb of RAM. GalliumOS 2.0 is based on Ubuntu 16.04 LTS (Xenial

If you want more videos of me replicating the bug, I will gladly create them
for you.

Also, I have another bug to report, which is much more difficult to replicate
and to which I have discovered a work around but I found disconcerting at
first, as well as a glitch, and some user interface design suggestions. If you
want me to report any or all of those items please let me know.

Having researched user comments about Kdenlive extensively (particularly on, I can assure you that although Kdenlive is remarkably powerful and
useful, it is still too rough around the edges for ordinary users who don’t
want to deal with catastrophic bugs, annoying glitches, and obvious user
interface design problems.

Personally, I have surmounted all of those issues. But the learning curve was
too steep and clearly unnecessary. 

Reproducible: Sometimes

Steps to Reproduce:
See the video and my "plain English" explanations above.

Actual Results:  
The world stopped rotating on its axis.

Expected Results:  
The world should continue rotating on its axis.

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