| Summary: | dissolve ignores transparency | ||
|---|---|---|---|
| Product: | [Applications] kdenlive | Reporter: | hadmut |
| Component: | Effects & Transitions | Assignee: | Vincent PINON <vpinon> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | fritzibaby, snd.noise |
| Priority: | NOR | Flags: | fritzibaby:
Brainstorm+
|
| Version: | 19.04.3 | ||
| Target Milestone: | --- | ||
| Platform: | Other | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Attachments: | Example as described. | ||
Same problem seen when using PNG images with transparency as a layer. Still exists in 19.07.90 Thanks for reporting. Confirmed. Workaround: use the transition "composite and transform". Seems to be fixed in 20.08.2 Yes, indeed it is fixed. Thanks for reporting. |
Created attachment 121260 [details] Example as described. SUMMARY Put a title clip with transparent background over a video and add a dissolve transition to make it appear smoothly. dissolve will ignore the transparency of the background and will use the background as solid until end of dissolve transition. Then (after dissolve) the background is correctly transparent.) STEPS TO REPRODUCE Simply use the attached example file or 1. Put some video or constant color (other than black) on V1 track. 2. create some title video with text and transparent background and put it over the video on V2. 3. add a dissolve transition 4. watch or render OBSERVED RESULT The dissolve transition uses the transparent background as if it were fully opaque. After the transition is finished, the background becomes transparent and composition works as expected. EXPECTED RESULT transparent background should be transparent during transition SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION