I have just come back to Synfig after not using it for around 8 months. Projects still load and preview OK but when I render using ffmpeg (any codec) it goes through the motions but there is no output file. The only alterations to my system during the past year will have been W10 updates and the recent installation of Corel Video Studio. I have uninstalled Synfig and loaded the most recent version.
I found one other reference to this issue but I cannot find a solution. Any help would be appreciated.