https://bugs.kde.org/show_bug.cgi?id=493878
Bug ID: 493878
Summary: Separate audio effects or tracks for left and right
channels
Classification: Applications
Product: kdenlive
Version: 23.08.5
Platform: Mint (Ubuntu based)
OS: Linux
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: Effects & Transitions
Assignee: j...@kdenlive.org
Reporter: kilocharl...@gmail.com
Target Milestone: ---
SUMMARY: I and others often record using a lav (clip-on) mic in addition to a
shotgun, mounted on the same camera using the left and right audio channel
inputs, resulting in an audio recording which is not "stereo" so much as it is
dual mono. These different audio sources require different processing in terms
of EQ and Dynamics. Kdenlive has the ability to apply the
appropriately-adjusted effects to these channels, but it lacks the ability to
apply the effects differently to the left and right audio.
It would be excellent and quite helpful if the effects stack had a button
"split per-channel" which then allowed for a separate effects stack for each
side. Or, when a clip comes in with two (or more) audio channels, if there was
a way to split it into, say, A1, A2, A3, etc separate mono audio tracks. That
might be the easiest way.
This would not result in additional CPU usage as each side would be mono,
resulting still in two channels of audio getting processed. (Which is what
happens when a user throws a plugin on a stereo track anyway.)
I understand kdenlive isn't a DAW, and I'm not asking for full-on flexible
audio routing. But I think being able to process the two channels independently
would be really useful to many people. A simple "split stereo audio to separate
mono audio tracks in the timeline" would do.
Current workarounds include exporting to an external program, applying
effects/edits, and then importing back. This is not only clumsy but can result
in a loss of sync depending on the details. It is also just generally more
difficult to edit when you have to switch applications.
STEPS TO REPRODUCE
1. Record a video with two different microphones, such as a shotgun and a
clip-on mic
2. Try to EQ the mics differently in kdenlive
3. Observe that there doesn't seem to be a way to split the stereo audio track
to two separate mono tracks, nor a way to assign effects separately to left and
right channels.
OBSERVED RESULT
Cannot apply effects separately to left and right channels. Cannot split left
and right audio to different tracks. Cannot route audio with much flexibility.
EXPECTED RESULT
Ability to split stereo audio to two audio tracks in the timeline, or, ability
to apply effects differently to left and right channels.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux Mint 21 (will upgrade soon, I know, ancient)
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
I posted this issue on the discussion forum and was encouraged to leave a
report here. Kdenlive is an excellent tool and I think what is proposed here
will be a welcome addition by many editors and producers. Thanks!
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