[jf43]

I've come across this post while searching for how to watch some of the sport that I have recorded off the TV in slow-motion, and seem to be within touching distance of a solution, but not quite there, so if anyone can help me finish off the setup, it would be much appreciated.

I'm running Kodi 17.6 on Ubuntu 18.04 on a dedicated box.

So I've tried to add a single frame advance to my MCE remote 'next chapter' button and also to 'Alt-a' on the keyboard, with the following keyboard.xml file :
<?xml version="1.0" encoding="UTF-8"?>
<keymap>
  <FullscreenVideo>
    <remote>
      <skipplus>PlayerControl(frameadvance(1))</skipplus>
    </remote>
    <keyboard>
      <a mod="alt">PlayerControl(frameadvance(1))</a>
    </keyboard>
  </FullscreenVideo>
</keymap>

And this seems to have worked, as I get the following entries in the log (with debug logging enabled) when I pause a video and then press the relevant buttons :
22:55:34.266 T:139761216188352   DEBUG: LIRC: Update - NEW at 68975:000000037ff07be5 00 KEY_NEXT mceusb (KEY_NEXT)
22:55:34.266 T:139761216188352   DEBUG: OnKey: sleep (0xdf) pressed, action is PlayerControl(frameadvance(1))
22:55:37.126 T:139761216188352   DEBUG: Keyboard: scancode: 0x40, sym: 0x0134, unicode: 0x0000, modifier: 0x100
22:55:37.127 T:139761216188352   DEBUG: OnKey: alt-leftalt (0x4f0d4) pressed, action is
22:55:37.633 T:139761216188352   DEBUG: Keyboard: scancode: 0x26, sym: 0x0061, unicode: 0x0061, modifier: 0x100
22:55:37.633 T:139761216188352   DEBUG: OnKey: alt-a (0x4f041) pressed, action is PlayerControl(frameadvance(1))

HOWEVER Kodi just doesn't seem to do anything with the order it's being given.

For other keypresses, there appears to be feedback from the executed command in the log file, but no such info here, so it appears that Kodi is just not executing the command - do I need to enable something somewhere, or compile something in to get FrameAdvance functionality?

Thanks in advance for any help