Showstopper: timeline playhead positioning delays. Is it a bug? Anything user can do?

[Alistair Riddoch]

I am not a developer, but I am interested in better understanding your
issues.

On Mon, Sep 23, 2019 at 12:10 PM DogFilm <videobrain at gmail.com> wrote:

> Many editors do lots of manual micro-movement in the timeline to find good
> cut points, what seems to be possible with Kdenlive using [shift | alt]
> left / right arrows to position the playhead.
>
> The playhead unfortunately always has some significant delay in following
> these keyboard movements, what adds up to the level of "not usable in real
> life" for "real" editing.
>
> One [shift] left action takes between one and two seconds, moving right
> seems to be a bit quicker, but still far away from the expected immediate
> positioning. What makes it worse: it adds up. So if you press seven times
> left arrow because you want to position exactly seven frames before the
> actual playhead position, it takes even longer. Looks like some positioning
> calculation could be optimized.
>

Seeking left in kdenlive can be very dependent on the video file format
being used. For example with AVCHD files (which are fairly well known to be
poorly suited to editing) stepping left works very poorly, but with
Matroska Video or MP4 files it works much more fluidly.

What format of video files are you using?


>
> This is especially annoying when positioning while the timeline is playing
> - this must of course be possible without any perceived delay.
>
> I understand that the timeline code is new, however this delay is a show
> stopper. If I show this to friends with many years of experience in editing
> they will just look at me with a big question mark ini their eyes -
> "seriously???"...
>
> To understand how this feels to someone editing videos every day, imagine
> your text editor would delay every cursor movement, you can then understand
> which level of "not acceptable" this is.
>
> Is this is bug?
> Can the user do anything to enhance that timeline positioning?
>
> This is an extremely basic thing and very important to get it right.
> Timeline positioning of course must work or at least feel like an
> immediate action.
>
> I guess it feels somehow strange to explain this to programmers of a video
> editing app, but I came to the conclusion that you may not have that on top
> of your testing list, otherwise the app would not have been released with
> that basic problem, so somebody needs to make you aware of that
> elephant-in-the-room that you do not seem to be relevant - it is very much!
>
> Thanks again!
>
>
>

-- 
Alistair Riddoch
alriddoch at googlemail.com
http://alistairriddoch.org/
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