I'm not suggesting it's really preferable in any situation or in any specific situation, I just found myself in a "what the hell" point and thought it worth a try, and it worked.
I was just thinking that it would be nice that for slideshow videos there was a variable frame rate, and turns out that it exist. I've found that the program handbrake can handle that easily, so I decided to install. Unfortunatelly it's only on Debians unnofficial multimedia repository, which can...