Bug 495683 - Rendering for some presets is inaccurate
Summary: Rendering for some presets is inaccurate
Status: RESOLVED WORKSFORME
Alias: None
Product: kdenlive
Classification: Applications
Component: Rendering & Export (other bugs)
Version First Reported In: 24.08.2
Platform: Microsoft Windows Microsoft Windows
: NOR minor
Target Milestone: ---
Assignee: Jean-Baptiste Mardelle
URL:
Keywords: triaged
Depends on:
Blocks:
 
Reported: 2024-11-01 11:03 UTC by mvmmodding
Modified: 2025-04-02 03:46 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
Example of "corrupted" render (194.34 KB, image/png)
2024-11-01 11:03 UTC, mvmmodding
Details

Note You need to log in before you can comment on or make changes to this bug.
Description mvmmodding 2024-11-01 11:03:52 UTC
Created attachment 175441 [details]
Example of "corrupted" render

ISSUE AT HAND:
Essentially, whenever rendering a Video as a GIF, MOV or potentially with others in kdenlive, the end result is inaccurate.
The Video overall renders fine as it is with any other preset (i.e. mp4 rendering has no issues), but with some presets the Video slightly "corrupts" of some sort (see attached image).

REPRODUCING THE ISSUE:
Simply render any video as a GIF
OR
Render a transparent video as MOV (worst one probably)

OBSERVED & EXPECTED RESULTS:
The video should've rendered with no issues, since the preview inside of kdenlive doesn't have any issues either.
Yet when viewing the video as a GIF, the corruption appears. I assume this might be a slight error in the rendering code.

SOFTWARE VERSIONS:
kdenlive: 24.08.2 (newest version as of now)
Windows: Windows 10

ADDITIONAL INFO:
- This Issue does appear with the Rendering presets GIF and MOV (others may exist too, but these are the most common)
- I don't know if this issue persists on other Operating Systems like MacOS, Linux or ubuntu
- The Issue seems to also exist in previous versions (I used 22.04.2 before, it had the exact same problem)
- My kdenlive has not been modded or changed, it is the base newest version with no changes
- The Issue doesn't change much based on video length or size, but the effects can be more dramatic with different background colors (i.e. Black appears glitchy)
Comment 1 Jean-Baptiste Mardelle 2025-03-03 07:54:13 UTC
Thanks for your report. What source material did you use to create the text ? Is it a png image, a title file, a video file or subtitles ? Best would be if you could create a simple project with 1 image or title clip that can reproduce the issue and attach the project file and source clip here, so we can try to reproduce the issue.
Thanks in advance.
Comment 2 Bug Janitor Service 2025-03-18 03:51:08 UTC
๐Ÿ›๐Ÿงน โš ๏ธ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!
Comment 3 Bug Janitor Service 2025-04-02 03:46:51 UTC
๐Ÿ›๐Ÿงน This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.