2016-02-29, 13:54
I don't use pictures or slideshow on my Pi, so at this moment I don't know.
Give me a little while and I'll test it for you and see. But I think play/pause may be designed for video - see the Action IDs (wiki) page for a bit more detail. There are separate play and pause actions also available, although whether they do anything different separately to the combined command I don't know. It may be that you've found a bug as well.
The PlayerControl function from the List of Built In Functions (wiki) may also be of interest, but I think it's just another way to access the above. But the text for that explicitly says "Allows control of music and videos", so it may be that there isn't a command for pausing a slideshow?
Give me a little while and I'll test it for you and see. But I think play/pause may be designed for video - see the Action IDs (wiki) page for a bit more detail. There are separate play and pause actions also available, although whether they do anything different separately to the combined command I don't know. It may be that you've found a bug as well.
The PlayerControl function from the List of Built In Functions (wiki) may also be of interest, but I think it's just another way to access the above. But the text for that explicitly says "Allows control of music and videos", so it may be that there isn't a command for pausing a slideshow?
