Video generation - passing public id containing a slash as a var
I'm trying to generate a video from a CLT template file as described here: https://cloudinary.com/documentation/video_generation. It works well if the video is located in the root folder (so no slashes in the public id), as well as with vars for text, colour, etc., but I'm having some issues passing a public id for a video which contains a slash.
I've tried passing it without encoding the slashes, with encoding the slash, and with adding a leading encoded slash, but I'm getting an "Invalid transformation component" error in the `X-Cld-Error` header.
This is what my vars look like: `(backgroundColor_white;titleText_crossfade;vid1_%2Fa-folder%2Fvideo)`. Also tried encoding the `-`, but no luck still. Couldn't find documentation on what's the correct way to do it, so any help is appreciated, thank you.