https://bugs.kde.org/show_bug.cgi?id=404082
Bug ID: 404082
Summary: small non-linear audio out-of-sync after rendering
Product: kdenlive
Version: 18.12.0
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: iticdig...@disroot.org
Target Milestone: ---
SUMMARY
When editing titles that should appear rhythmically to the music video and
sound are synchronous, but after rendering and playback in the player you can
see a small desynchronization of about 0.5 seconds. And it is not constant,
some titles appear on time, some lag behind.
This behavior is observed in all players that I tried: SMPlayer, Parole, MPV,
and som windows players on other PC with Windows.
The strange thing is that if you import the rendered video into a new project
in Kdenlive, it plays correctly and synchronously, as well as during editing.
I tried to render video in all formats from General, Lossless, OldTV - always
the same - out of sync.
I tried the minimum and maximum quality-the same.
Tried to delete from the project everything except this fragment-the same.
I tried to use other versions of Kdenlive (appimage) older and the latest.
The fragment consists of PCM wav audio (1 minute), about 10 standard title
clips (made in kdenlive editor) and three short video clips of 4 seconds each.
OBSERVED RESULT
audio out of sync
EXPECTED RESULT
sync
SOFTWARE/OS VERSIONS
UbuntuStudio 18.04.1
Kdenlive 18.12.0 appimage (and other appimage versions)
ADDITIONAL INFORMATION
Found exactly the same problem from 2017
https://forum.kde.org/viewtopic.php?f=265&t=151277
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