SLAVE MODE PROTOCOL
-------------------

If the -slave option is given, playback is controlled by a line-based protocol.
Each line must contain one of the following commands:

seek <value> [type=<0/\:1/\:2>]
	Seek to some place in the movie.
	Type 0 is a relative seek of +/\:- <value> seconds.
	Type 1 seek to <value> % in the movie.
	Type 2 is a seek to an absolute position of <value> seconds.
edl_mark
	????
audio_delay <value>
	Adjust the audio delay of value seconds
quit
	Quit MPlayer
pause
	Pause/\:unpause the playback
grap_frames
	Somebody know ?
pt_step <value> [force=<value>]
	Go to next/\:previous entry in the playtree.
pt_up_step <value> [force=<value>]
	Like pt_step but it jumps to next/\:previous in the parent list.
alt_src_step <value>
	When more than one source is available it selects the next/\:previous one
	(only supported by asx playlist).
sub_delay <value> [abs=<value>]
	Adjust the subtitles delay of +/\:- <value> seconds or set it to <value>
	seconds when abs is non zero.
osd [level=<value>]
	Toggle OSD mode or set it to level when level >= 0.
volume <dir>
	Increase/\:decrease volume
use_master
	Switch volume control between master and pcm.
mute
	Mute/\:unmute sound output.
[contrast|brightness|hue|saturation] <-100-100> [abs=<value>]
	Set/\:Adjust video parameters.
frame_drop [type=<value>]
	Toggle/\:Set frame dropping mode.
sub_alignment <value>
	Set subtitle alignment.
sub_visibility
	Toggle subtitle visibility.
sub_pos <value>
	Adjust subtitles position.
vobsub_lang
	Switch the subtitle language when using VOBSub subtitles.
get_percent_pos
	???
get_time_length
	???
vo_fullscreen
	Switch to fullscreen mode.
panscan value [value2]
	???
loadfile url
	Load the given file/\:url.
loadlist file
	Load the given playlist file.
change_rectangle val1 val2
	??? used by the rectangle video filter.
dvdnav button
	Press the given dvdnav button.
	1 is up, 2 is down, 3 is left, 4 is right, 5 is menu and 6 is select.
tv_step_channel <dir>
	Select next/\:previous tv channel.
tv_step_norm
	Change TV norm.
tv_step_chanlist
	Change channel list.
tv_set_channel channel
	Set the current TV channel.
tv_last_channel
	Set the current TV channel to the last one.
tv_set_freq <frequency in MHz>
	Set the tv tuner frequency.
tv_set_norm <norm>
	Set the tv tuner norm. PAL, SECAM, NTSC and so on..
gui_[loadsubtitle|about|play|stop]
	GUI actions