https://bugs.kde.org/show_bug.cgi?id=455504

            Bug ID: 455504
           Summary: When i change the clip's speed, the clip has its
                    start/end fowarded by one frame
           Product: kdenlive
           Version: 22.04.1
          Platform: Microsoft Windows
                OS: Microsoft Windows
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Effects & Transitions
          Assignee: vpi...@kde.org
          Reporter: fernandommu...@gmail.com
  Target Milestone: ---

SUMMARY
When i change the clip's speed, the clip has its start/end fowarded by one
frame

STEPS TO REPRODUCE
1. Alter the speed of a trimmed clip.

OBSERVED RESULT
The clip has its start/end fowarded by one frame, which means that the clip
begins one frame before where it was supposed to start, and ends one frame
before it was supposed to end. The issue becomes very apparent when for ex; You
are taking one scene from a movie, then you look at the first frame do your
rendered video and it's from the previous scene.

EXPECTED RESULT
The speed of the clip being altered without being fowarded by one frame.

SOFTWARE/OS VERSIONS
Windows: 11


ADDITIONAL INFORMATION
1. When i change the clip's speed (in my case i choose 50% speed), the clip has
its start/end fowarded by one frame, which means that the clip begins one frame
before where it was supposed to start, and ends one frame before it was
supposed to end. The issue becomes very apparent when for ex; You are taking
one scene from a movie, then you look at the first frame do your rendered video
and it's from the previous scene.

2. When using "reverse clip" after adjusting the frames at the beginning and at
the end of the already slowed down clip, the clip isn't affected. However, if
the clip had no prior edits, and then i apply "reverse clip" at 100%, the clip
has its start/end fowarded by one frame, just like i've described in the first
situation.
When applying "reverse clip" at 50%, instead of being one frame at the
beginning and end, now there are two on each.

In both cases, it involves a video that got trimmed down into a scene with the
razor tool. I don't think the glitch happens when using a video for these speed
edits, since unlike trimmed clips, there's no frames beyond the start and end
of it.

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