GEM messages Message 'MP' (M_PLAYER)
Documentation of Aniplayer

7.1 Message VA_START

 msg[3] = Path address (high)
 msg[4] = Path address (low)
 msg[5] = 0, or message ('MP' for example) for a return message
                at the end of file

 A command line can be added:

  +c: with speed control (-c: without)
  +d: with DSP (-d: without DSP)
  +g: with GEM (-g: without GEM)
  +i: loop (-i: without)
  +k: with keyboard (-k: without to use only AV_SENDKEY)
  +l: minimal window (-l: normal window)
  +m: with images (-m: sound only)
  +n: add name to the Playlist; the other options are ignored if the
      main window is playing a file
  +o targetname: convert file (save in AVR/WAV/AIF/MP?/AC3/OGG/AVI/MOV)
  +p: with sound (-p: turn off sound)
  +q: with good quality (-q: without)
  +r: resample sound (-r: without)
  +s: skip images (-s: all images)
  +t: tape recorder look (-t: slider)
  +v: direct display (-v: without)
  +xnnnnn, +ynnnnn: movie position (5 numbers max, default centre)

 If the player detects the GEMJing options -dnnnnn or -rnnnnn, the
Aniplayer options listed above are ignored, and the following options
are recognised:

  -dnnnnn: Delay.  Sets a delay of nnnnn seconds (5 numbers max) between
           each repeat.  -d0 means there is no delay.  If the -d option
           is not supplied the default is -d0.
  -q:      Quit.  Plays a file and quits afterwards.  The menu bar
           disappears.
  -rnnnnn: Repeat.  The file is played nnnnn times (5 numbers max).
           -r1 means the file will be played once, -r0 means endless
           repeat.  If the -r option is not supplied, the default is -r1.