https://bugs.kde.org/show_bug.cgi?id=506761
Bug ID: 506761
Summary: Feature needed, Timeline stretching implementation of
audio scrubbing
Classification: Applications
Product: kdenlive
Version First unspecified
Reported In:
Platform: Other
OS: All
Status: REPORTED
Severity: major
Priority: NOR
Component: Monitors & Playback
Assignee: j...@kdenlive.org
Reporter: t...@timkrief.com
Target Milestone: ---
SUMMARY
When using a speed greater than 1, like 2 for instance, audio sounds glitchy.
It was flagged as a bug by different people:
https://bugs.kde.org/show_bug.cgi?id=464558
https://bugs.kde.org/show_bug.cgi?id=487976
And is preventing people from doing proper editing of long content since at
least 2020:
https://www.reddit.com/r/kdenlive/comments/k17ze6/audio_inintelligible_whan_speeding_up_playback/
It is even discussed in Kdenlive forum
https://discuss.kde.org/t/playing-fast-forward-on-kdenlive-is-laggy-pc-not-powerful-enough/16505
I also thought it was a bug, but after some digging, I don't think it is. I
think it's an implementation decision, and that's why I'm now opening this
Feature Request.
For reference: https://en.wikipedia.org/wiki/Scrubbing_%28audio%29
I think right now Kdenlive is using Cut-and-paste audio scrubbing, and I think
it would be better to offer the possibility to use a Timeline stretching
implementation of audio scrubbing. It is a wide spread feature in modern video
editors, a seemingly ubiquitous one. So much so that users can't spot that the
feature is missing and just think that there is a bug.
I know that Kdenlive is using MLT with SDL or RtAudio, and I didn't find any
way to select an implementation of audio scrubbing there, it's just on or off.
So I don't know if that's a feature that we should ask to MLT, SDL, RTaudio
etc, or if Kdenlive could implement it on their side. Anyways, it's a much
needed feature for a modern video editor, and I think it should be considered
as a priority since its addition could benefit Kdenlive and its user greatly.
Note: I wanted to open this feature request in Kde Invent, but I saw this
prompt: "Please note that all bug reports and feature requests should be filed
on bugs.kde.org and should never be raised here." That's why I'm opening this
feature request here.
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