https://bugs.kde.org/show_bug.cgi?id=417031
Bug ID: 417031
Summary: unusable: clip/project play very jerky, play head and
audio out of sync
Product: kdenlive
Version: 19.12.1
Platform: Other
OS: FreeBSD
Status: REPORTED
Severity: major
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: s...@crufty.net
Target Milestone: ---
SUMMARY
19.12.0 and 19.12.1 cannot play video (any format) well enough to edit.
18.12.3 works fine on same machine
STEPS TO REPRODUCE
1. upgrade kdenlive to 19.12
2. create new project and pull in a clip - .mov,.mts,... makes no difference
3. play
4. observe unusable performace
5. downgrade just kdenlive to 18.12
6. observe reasonable performance
OBSERVED RESULT
video and audio play are extremely erratic, play head stalls for seconds and
everything quickly out of sync.
EXPECTED RESULT
obviously smooth play with play-head and audio tracking correctly
NOTE: another machine running same OS version, will similar CPU but better GPU
works ok with 19.12 details below
SOFTWARE/OS VERSIONS
FreeBSD: 11.3-RELEASE-p3
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
Sorry, the above does not map well to FreeBSD packages.
mlt version is 6.18.0_1
Note: only the kdenlive version differs, after 19.12 proved unusable, I
downgraded just the kdenlive package to 18.12 - all others remain at the
versions suitable for 19.12
ADDITIONAL INFORMATION
The machine with problem has decent cpu: i9-7900X CPU @ 3.30GHz (10 core)
Modest GPU: NVIDIA GPU GeForce GTX 1050 Ti
The machine where 19.12 works - cpu: Xeon(R) CPU E5-2637 v3 @ 3.50GHz
GPU: NVIDIA GPU Quadro K4200
both machines have 32G ram and all OS and support packages at same versions
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