I've experienced this in previous versions as well. When importing .mov files, the transparent background isn't displayed and is instead rendered black, so some kind of luma effect always needs to be applied. SUMMARY STEPS TO REPRODUCE 1. 2. 3. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: (available in the Info Center app, or by running `kinfo` in a terminal window) Linux/KDE Plasma: KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
Not all .mov files have an alpha channel. Can you provide a sample of that .mov file that has alpha but rendered black in Kdenlive?
How can I send you a snippet? Yes, it's black and the file has transparency.
(In reply to Jose from comment #2) > How can I send you a snippet? Yes, it's black and the file has transparency. Add it as an attachment here or post a link to a file share if it's too big
Created attachment 188380 [details] clip .mov con transparencia El archivo contiene canal alpha pero kdenlive no la detecta
Created attachment 188387 [details] Color clip scaled down in Clip Monitor (In reply to Jose from comment #4) > Created attachment 188380 [details] > clip .mov con transparencia > > El archivo contiene canal alpha pero kdenlive no la detecta Thanks for the clip. It pains me to say that the clip does NOT have transparency. I have attached two screenshots: one with a color clip that has been scaled down to show the background in the clip monitor, and the other with the clip also scaled down a little. I have set the Clip Monitor background to Checkerboard to see where there is transparency.
Created attachment 188388 [details] Clip scaled down in Clip Monitor
Created attachment 188389 [details] Effect panel This shows the Transform effect applied to the clip in the Project Bin
(In reply to Jose from comment #4) > Created attachment 188380 [details] > clip .mov con transparencia > > El archivo contiene canal alpha pero kdenlive no la detecta According to mediainfo this clip used Apple ProRes 422HQ which doesn't support an alpha channel. ProRes 4444 does according to https://www.andrewgormley.com/post/how-to-choose-the-right-version-of-prores-for-your-project
Comment on attachment 188388 [details] Clip scaled down in Clip Monitor En la imagen se sigue viendo sin transparencia
Comment on attachment 188388 [details] Clip scaled down in Clip Monitor Maybe I was wrong when choosing the clip, but it has happened to me with many movs. I usually make a lot of animations in Friction with transparent background and mov file, and they don't work
Maybe I was wrong when choosing the clip, but it has happened to me with many movs. I usually make a lot of animations in Friction with transparent background and mov file, and they don't work
(In reply to Jose from comment #11) > Maybe I was wrong when choosing the clip, but it has happened to me with > many movs. I usually make a lot of animations in Friction with transparent > background and mov file, and they don't work A clip in Kdenlive may have transparency but unless you select a video codec and format that supports an alpha channel in the resulting video, any transparency will be rendered against a black background and appear black in the final video. I can imagine other applications working the same way. So, pay close attention to the render or export settings in Friction and choose a format that supports an alpha channel like ProRes 4444 or VP8 and VP9. The mlt format must be set to rgba, pixel format to bgra. I am closing this bug report as RESOLVED-NOTABUG