Bug 446242

Summary:	Preview effects and Wipes seem fine but Rendered video is a mess!
Product:	[Applications] kdenlive	Reporter:	sarantospgs <sarantospgs>
Component:	Rendering & Export	Assignee:	Aaron C <cushingar>
Status:	RESOLVED FIXED
Severity:	critical	CC:	ahiijny, berndmj, cushingar, fritzibaby
Priority:	NOR
Version First Reported In:	21.08.3
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	The JPG that was shortened while rendering The cropped PNG that was shortened while rendering Timeline before render Timeline after render and restart of KDEnlive The temporary "fix"

Description sarantospgs@gmail.com 2021-11-29 14:56:21 UTC

I had a project working on and i stopped for 2 weeks and continued again. So the part that i had done editing before renders fine, but the second part where I have put extra clips and effects, on the rendered video, are a mess. Wipe effects out of order and clips seem cut for no reason(i see black screens and later the next clips comes). The strange thing is also that in preview mode while editing, seems fine! And another thing is that while editing, sometimes, wipe effect or zoom in or zoom out won't show even in preview. So I delete them and put them again. Sometimes it is getting fixed if I put the clips in the same track! I don't know why. In my project i have 2 video tracks and one audio.

It's very strange. I deleted all the config files found in here. Also i reinstalled kdenlive. Nothing changed. Same thing happening.

Update: Whenever I close and open the project again the clips, effects and all the sequence is ALL MESSED UP. Event though i saved before i rendered the project. With that sequence that I'm seeing now it makes sense why the rendered video was like that. But it doesn't make sense why and how this is happening. I edit my project. I save and in preview it seems fine. Later I render it and it's messed up(only the second part of my project) and when I reload it ALSO THE PREVIEW IS MESSED UP..

I have no idea why this is happening. Any help?

STEPS TO REPRODUCE
I edit my project. I save and in preview it seems fine. Later I render it and it's messed up(only the second part of my project) and when I reload it ALSO THE PREVIEW IS MESSED UP..

SOFTWARE/OS VERSIONS
Linux Kernel: 5.15.5-zen1-1-zen x86_64 bits: 64 compiler: gcc v: 11.1.0
Desktop: i3 4.20.1 info: i3bar vt: 7 dm: LightDM 1.30.0 Distro: Garuda Linux base: Arch Linux

Comment 1 Aaron C 2021-12-03 23:36:20 UTC

On a much smaller project I've noticed this same behavior. It will appear fine in the preview, and render without crashes, but if you check the rendered video it's messed up, and if you reload the project file (even if it was saved before the render) it will show you exactly how everything was messed up.
In my case, only one track was affected and oddly, only one of the clips had gotten shorter. Everything after that was the same length, just moved earlier on the timeline.
I tried removing the effects, shortening the clip, and cropping the image, and each time it still broke the render.
Then I rendered it without that one clip, and IT WORKED JUST FINE...

I have no idea what happened but ???
I'll attached the image(s) I was using (I tried both a JPG and a cropped PNG, they both broke it)
I'm on GNOME 41.1 (Manjaro) and using KDEnlive version 21.08.3

Comment 2 Aaron C 2021-12-03 23:38:20 UTC

Created attachment 144185 [details]
The JPG that was shortened while rendering

Comment 3 Aaron C 2021-12-03 23:38:55 UTC

Created attachment 144186 [details]
The cropped PNG that was shortened while rendering

Comment 4 Aaron C 2021-12-03 23:45:09 UTC

Created attachment 144187 [details]
Timeline before render

Comment 5 Aaron C 2021-12-03 23:45:39 UTC

Created attachment 144188 [details]
Timeline after render and restart of KDEnlive

Comment 6 Aaron C 2021-12-04 00:00:22 UTC

Ok, so I just tested it wit a different image and it still broke so now I'm just confused

Comment 7 Aaron C 2021-12-04 00:09:35 UTC

Well, I fixed it by dividing the troublesome image down into two separate images and for some reason THATS what fixes it. I don't know either.

Comment 8 Aaron C 2021-12-04 00:10:34 UTC

Created attachment 144190 [details]
The temporary "fix"

Comment 9 sarantospgs@gmail.com 2021-12-04 09:17:54 UTC

What I did was to use a new app image that was provided in the another submitted issue. It's a daily app image provided by devs as a temporary fix...
Here is the other thread https://bugs.kde.org/show_bug.cgi?id=445644

Comment 10 Bernd 2022-12-12 20:13:34 UTC

Can this bug report be closed now that there is 22.12.0 out?

Comment 11 emohr 2022-12-18 10:17:27 UTC

Please try with version 22.12.0. Make sure parallel processing is switched off in render -> more options.

Comment 12 Bug Janitor Service 2023-01-02 05:27:28 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

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If you have already provided the requested information, please
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