https://bugs.kde.org/show_bug.cgi?id=444717
Bug ID: 444717
Summary: Different audio volumes in editor window and rendered
video
Product: kdenlive
Version: 21.08.2
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: User Interface
Assignee: j...@kdenlive.org
Reporter: had...@danisch.de
Target Milestone: ---
I just ran into a usability trap: wav (and other) audio files are played with
different volume in the editor window and in the rendered video.
I accidently produced a voice over, that was too silent. I had used audacity to
record and clean it, and it had optimal volume in audacity, but I had
accidently moved the gain slider on the left side of the track to some negative
value without noticing it. So while the record was good and optimal, the
exported wav file was not, i.e. it was way too silent, volume too low.
My fault, that the audio file was bad, but I didn't realize.
Because once I had imported this into kdenlive, kdenlive showed the wave form
as normal and good, and it even played it in the preview/editor window with
good volume, so it still appeared to be good. But in the rendered video, it had
it's real volume, so it had a significant lower volume as other parts of the
video. (cost me some hours to figure this out and find the reason for the
problem.)
STEPS TO REPRODUCE
1. have a good video with optimal audio volume
2. have a poor audio with e.g. voice but too silent (e.g. use audacity to
record bla bla, but move the gain slider on the left to some negative value
before exporting to wav).
3. import both into kdenlive and put the video first and the audio after it in
the time line
4. listen in editor mode and see the waveform
5. render and hear the difference
OBSERVED RESULT
audio levels in editor window differ from rendered video
EXPECTED RESULT
audio levels in editor window should be similar to rendered video
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Ubuntu 20.04 with appimage
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
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