Bug 418592

Summary:	Rendering a zone with the in and out points being at 'splits' between clips fails
Product:	[Applications] kdenlive	Reporter:	Schuyler Kelley <sb24kelley>
Component:	Rendering & Export	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED UPSTREAM
Severity:	major	CC:	fritzibaby
Priority:	NOR	Flags:	fritzibaby: timeline_corruption+
Version:	19.08.2
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Schuyler Kelley 2020-03-07 20:03:14 UTC

SUMMARY
I'm using Lubuntu 19.10 with standard packages, except that I am using a Radeon r380 and had tried to install the proprietary drivers -- it didn't work, but the system is otherwise functional for gaming and video production so I don't think that's the issue.

When rendering a selected zone with the in and out points being at splits between clips, the rendering process appears to start as normal, but quickly reports "Rendering finished in 00:00:01" -- trying to play the output file with VLC does not work.

I have not tested this for reproducibility, I'm just describing what happened. I tried a couple of different ways of rendering what I needed to render, and finally wound up deleting the clips on either side of the clip I wanted, moving it to the front of the timeline, and just rendering the "whole project."


STEPS TO REPRODUCE
1. Import a 720p hd 30fps .mp4 clip with length "02:03:05:11"
2. Drop the clip in V1 and A1, and delete v2 and a2
3. Create splits at 00:12:26:12 and 00:16:20:00, and set the zone in and out there as well
4. Add Saturation [Sat.: 26] and Denoiser [Spat.: 227; Temp.: 267] effects to the middlemost clip created by the splits
5. Start to render the Selected Zone with any output format (I tried several but not all)

OBSERVED RESULT
Rendering finished in 00:00:01, with a non-functional output file

EXPECTED RESULT
Rendering finished in 00:04:30, with a watchable file

Comment 1 emohr 2020-03-08 16:30:20 UTC

Rendering with GPU acceleration is not stable and switched of in the AppImage. 

Please try with the current Kdenlive AppImage version 19.12.3 to see if there are any packaging issues https://files.kde.org/kdenlive/release/ 

If the problem/issue doesn't occur when using the AppImage, then it's your configuration or packaging.

Comment 2 Schuyler Kelley 2020-03-13 20:27:58 UTC

(In reply to emohr from comment #1)
> Rendering with GPU acceleration is not stable and switched of in the
> AppImage. 
> 
> Please try with the current Kdenlive AppImage version 19.12.3 to see if
> there are any packaging issues https://files.kde.org/kdenlive/release/ 
> 
> If the problem/issue doesn't occur when using the AppImage, then it's your
> configuration or packaging.

The AppImage worked as expecte.

I checked to see that I didn't have GPU acceleration enabled; so I'm not sure if I should mark this resolved? If it's a problem with the packaging, I'm also not sure where to report that. But for my purposes, this works great. Thank you.

Comment 3 emohr 2020-03-14 09:34:02 UTC

Thank you for the feedback. Glad to hear it works. 

As this is not in Kdenlive's hand, please ask the Ubuntu community to solve the packaging issue.

We close this bug. If it still appears in the latest version, please feel free to re-open it and update the affected version number.