Bug 425978

Summary:	kdenlive is not rendering properly on Windows 10 version 20.08.0
Product:	[Applications] kdenlive	Reporter:	laqco.spammoq
Component:	Video Display & Export	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED FIXED
Severity:	grave	CC:	fritzibaby, okantomakturk566
Priority:	NOR	Flags:	fritzibaby: Brainstorm+
Version:	20.08.0
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:	https://invent.kde.org/multimedia/kdenlive/-/commit/45cbc455938173523a3c3c2c1f90c4ebf9a30ad8	Version Fixed In:	20.08.2
Attachments:	The file is a video which should have the Defish effect with manual scaling and some nosync0r effects.

Description laqco.spammoq 2020-08-30 12:28:53 UTC

SUMMARY
I recently installed the new kdenlive update. Since then the final rendered video has bugs like false transitions, asynchronous video and audio. But in the preview everything is right and even if I render a preview zone, it works.

HINT: The bug also occured with friends who also have Windows 10.


STEPS TO REPRODUCE
1. Install the newest kdenlive update on Windows 10.
2. Edit a video.

   For example I added the Defish effect on a clip and changed the Amount.
   (In the render there was no visible effect.)

   Second example: Cut some Clips with both audio and video in a row!
   (The audio and video will very soon start to get asynchronous.)

3. Render the Video in any format, for example mp4/webm/mpg.


OBSERVED RESULT
The rendered video will not be the expected; it will be different from the preview.


EXPECTED RESULT
The rendered video should be the same as in the preview.


SOFTWARE/OS VERSIONS
OS: Windows 10, Version 2004
KDE Plasma Version: <didn't find it>
KDE Frameworks Version: 5.71.0
Qt Version: 5.15.0


ADDITIONAL INFORMATION
This bug is very urgent to me - and I'm sure, many other kdenlive Windows Users are also wondering about this bug.




Best regards - Laqco.

Comment 1 laqco.spammoq 2020-08-30 12:31:13 UTC

Created attachment 131286 [details]
The file is a *video* which should have the Defish effect with manual scaling and some nosync0r effects.

Comment 2 okantomakturk566 2020-08-30 12:48:23 UTC

I have this problem too. 
For now I use version 20.04 to avoid problems such as these listed.

Comment 3 emohr 2020-08-30 13:32:13 UTC

Problem is known: https://invent.kde.org/multimedia/kdenlive/-/issues/781. 

Workaround: before Rendering. Close Kdenlive, switch your system language to English (USA) which has a dot as decimal separator. Restart Kdenlive and render should work.

Comment 4 emohr 2020-09-01 14:57:11 UTC

Will be fixed with 20.08.2.

Comment 5 laqco.spammoq 2020-10-06 08:04:27 UTC

(In reply to emohr from comment #4)
> Will be fixed with 20.08.2.

Thanks a lot!