In the output of my video there is a short sequence where the whole video is solid red, with some corrupted text visible near the bottom. As usual in video editing software, this probably marks corrupted or missing frames. But why does it happen?
This happens in a location in the video where I put a Kdenlive Title Clip below a still image with a Fade Out effect. It does not happen with all possible combinations of rendering settings. In my case, it happens in a MP4 HD 1920×1080 project if setting it to be scaled to 1280×720 in the rendering settings and with output quality set to 26.
Kdenlive 19.12.3 under Ubuntu Linux 20.04 here.