Created attachment 109690 [details] The example project and the screenshot I have faced a strange behaviour of "Fade to/from Black" and "Speed" effects, when they are applied together to the same clip. "Fade" effects duplicates appear, and time values are changed to wrong numbers. Steps: 1) Create a new project. 2) Add a clip on the timeline (I have used "Plasma browser integration" from YouTube (720p, MP4) as an example. 3) Add "Fade to Black" and "Fade from Black" effects, don't change default values (however, if they are changed to custom, the error appears too. Just as a precaution) 4) Add speed effect, set to 200%. 5) Save the project. 6) Reopen it. 7) Check clip effects and their parameters. There will be one extra "Fade to Black" effect, and maybe other "Fade" effects parameters will be changed. As I have noticed, mostly "Fade to Black" is duplicated with a strange parameter, and sometimes "Fade from Black" changes its value too. I have attached an example project (without a video, you can find it on YouTube) and a screenshot.
Cannot reproduce using daily appimage build. can you please test and close.
It seems that this report is related to very old unmaintained version. A lot changed since then, especially the timeline got a complete rewrite and it is likely that this has been fixed. Feel free to reopen this bug or create a new report if this is still happening with the latest version (https://kdenlive.org/en/download/)