Bug 404682

Summary:	timeline refactor 2019-02-21_Adjusting first frame of composition freezes UI
Product:	[Applications] kdenlive	Reporter:	Evert Vorster <evorster>
Component:	User Interface & Miscellaneous	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED FIXED
Severity:	normal	CC:	fritzibaby
Priority:	NOR	Flags:	fritzibaby: timeline_corruption+
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	backtrace of the crash

Description Evert Vorster 2019-02-22 06:21:39 UTC

SUMMARY
I have finally been able to duplicate the UI freeze reliably.

STEPS TO REPRODUCE
1. Generate project with two video and two audio tracks
2. Add three sections of clips to the timeline
3. First clip to the bottom video track
4. Second clip to the top video track, overlapping first clip by a few frames
5. Third clip to the bottom video track, overlapping second clip by a few frames
6. Select top video clip, and add composition
7. Drag composition to align last frame to the last frame of the top video clip
8. Try to adjust the first frame of the composition by dragging the front of the composition on the timeline.

OBSERVED RESULT
UI freeze

EXPECTED RESULT
First frame to be adjusted with drag of mouse.

SOFTWARE/OS VERSIONS
Arch Linux updated 2019-02
ADDITIONAL INFORMATION

Comment 1 Evert Vorster 2019-02-23 06:20:24 UTC

Created attachment 118312 [details]
backtrace of the crash

Comment 2 Evert Vorster 2019-02-23 06:22:30 UTC

Funny thing, kdenlive now crashes when I adjust the first frame of a composition after dragging it around. Good thing, as we now have a nice gdb crash log. 

It's a bit long, as I was dragging clips around, the first clip I dragged into the timeline the audio track would display blank, but that is not related to this bug, I hope.

Have at it!

Comment 3 Evert Vorster 2019-02-24 05:59:08 UTC

Fixed properly, thank you very much.