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jeanlf edited this page Feb 26, 2020 · 74 revisions

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Usage: MP4Client [options] [filename]


The player accepts any URL supported by GPAC.
Specific URLs shortcuts are available, see GPAC Compositor (gpac -h compositor)
Version: 0.9.0-DEV-rev3322-gdebc3776e-filters
(c) 2000-2019 Telecom ParisTech distributed under LGPL v2.1+ -
For more info on GPAC configuration, use gpac -h bin)


-mem-track: enable memory tracker
-mem-track-stack: enable memory tracker with stack dumping
-rti (string): log run-time info (FPS, CPU, Mem usage) to given file
-rtix (string): same as -rti but driven by GPAC logs
-size (string): specifie visual size WxH? If not set, scene size or video size is used
-no-thread: disable thread usage (except for depending on driver audio)
-no-audio: disable audio
-pause: pause at first frame
-play-from (number): start playback from given time in seconds in media
-speed (number): start playback wit given speed
-loop: loop playback
-fs: start in fullscreen mode
-exit: exit when presentation is over
-run-for: run for indicated time in seconds and exits
-service (int): auto-tune to given service ID in a multiplex
-no-save: do not save configuration file on exit
-no-addon: disable automatic loading of media addons declared in source URL
-gui: start in GUI mode. The GUI is indicated in the configuration file [General]StartupFile
-ntp-shift (int): shift NTP clock of the given amount of milliseconds
-p (string): use indicated profile for the global GPAC config. If not found, config file is created. If a file path is indicated, this will load profile from that file. Otherwise, this will create a directory of the specified name and store new config there. Reserved name 0 means a new profile, not stored to disk. Works using -p=NAME or -p NAME
-stats: dump filter session stats after playback
-graph: dump filter session graph after playback
-nk: disable keyboard interaction
-h,-help: show this help. Use -hx to show expert help
-hc: show libgpac core options
-hr: show runtime options when keybard interaction is enabled

MP4Client runtime commands

Prompt Interaction

The following keys are used for prompt interaction:
q: quit
X: kill
r: reload current presentation
o: connect to the specified URL
O: connect to the specified playlist
N: switch to the next URL in the playlist. Also works with \n
P: jump to a given number ahead in the playlist
D: disconnect the current presentation
G: select object or service ID
p: play/pause the presentation
s: step one frame ahead
z: seek into presentation by percentage
T: seek into presentation by time
t: print current timing
u: send a command (BIFS or LASeR) to the main scene
e: evaluate JavaScript code in the main scene
Z: dump current output frame to PNG
w: view world info
v: view list of active media objects in scene
i: view Object Descriptor info (by ID)
j: view Object Descriptor info (by number)
b: view media objects timing and buffering info
m: view media objects buffering and memory info
d: dump scene graph
k: turn stress mode on/off
n: change navigation mode
x: reset to last active viewpoint
3: switch OpenGL on or off for 2D scenes
4: force 4/3 Aspect Ratio
5: force 16/9 Aspect Ratio
6: force no Aspect Ratio (always fill screen)
7: force original Aspect Ratio (default)
H: set HTTP max download rate
E: force reload of compositor options
L: change to new log tool/level. CF MP4Client usage for possible values
R: toggle run-time info display in window title bar on/off
F: toggle displaying of FPS in stderr on/off
f: print filter session stats
g: print filter session graph
h: print this message
M: specify video cache memory for 2D objects ! experimental !

Content interaction

It is possible to interact with content (interactive or not) using mouse and keyboard.
The following commands are available:

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