VLC命令(2015/01/21)

 

google [vlc command line offset time]

資料來源：http://zzwqw.blog.163.com/blog/static/66872532201402185234388/

 

Use the command line
TODO: completely outdated

All standard operations of VLC should be available from the GUI. However, some complex operations can only be done from the command line and there are situations in which you don’t need or want a GUI. Here is the complete description of VLC’s command line and how to use it.

You need to be quite comfortable with command line usage to use this.

Note: Windows users have to use the –option-name=”value” syntax instead of the –option-name value syntax.

Getting help
VLC uses a modular structure. The core mainly manages communication between modules. All the multimedia processing is done by modules. There are input modules, demultiplexers, decoders, video output modules, …

This chapter will only describe the “general” options, i.e. the core options. Each module adds new options. For example, the HTTP input module will add options for caching, proxy, authentication, …

By using vlc –help, you will get the basic core options. vlc –longhelp will give all the basic options (core + modules). Adding –advanced will give the “advanced options” (for advanced users). So vlc –longhelp –advanced will give you all options. You can also append –help-verbose if you want more detailed help.

Also, you might want to get debug informations. To do this, use -v or -vv (this will show lower severity messages). If your console supports it, you can add –color to get messages in color.

Opening streams
The following commands start VLC and start reading the given element(s):

Opening a file
Start VLC with:

% vlc my_file
VLC should be able to recognize the file type. If it does not, you can force demultiplexer and decoder (see below).

A list of all video and audio codecs supported by VLC is available on the VLC features list .

Opening a DVD or VCD, or an audio CD
Start VLC with:

For a DVD with menus:

% vlc dvd://[device][@raw_device][@[title][:[chapter][:angle]]]
In most cases, vlc dvd:// or vlc dvd://[device] will do. [device] is for example /dev/dvd on GNU/Linux or D: on Windows (complete path to your DVD drive).

or

(DVD without menus):

% vlc dvdsimple://[device][@raw_device][@[title][:[chapter][:angle]]]
or

(VCD):

% vlc vcd://[device][@{E|P|E|T|S}[number]]
or

(Audio CD):

% vlc cdda://[device][@[track]]

Receiving a network stream
To receive an unicast RTP/UDP stream (sent by VLC’s stream output), start VLC with:

% vlc rtp://@:5004
If 5004 is the port to which packets are sent. 1234 is another commonly used port number. you use the default port (1234), vlc rtp:// will do. For more information, look at the Streaming Howto.

To receive an multicast UDP/RTP stream (sent by VLC’s stream output), start VLC with:

% vlc rtp://@multicast_address:port
To receive a SSM (source specific multicast) stream, you can use:

% vlc rtp://server_address@multicast_address:port
This only works on OSs that support SSM (Windows XP and Linux).

To receive a HTTP stream, start VLC with:

% vlc http://www.example.org/your_file.mpg
To receive a RTSP stream, start VLC with:</para>

% vlc rtsp://www.example.org/your_stream

Modules selection
VLC always tries to select the most appropriate interface, input and output modules, among the ones available on the system, according to the stream it is given to read. However, you may wish to force the use of a specific module with the following options.

–intf <module> allows you to select the interface module.
–extraintf <module> allows you to select extra interface modules that will be launched in addition to the main one. This is mainly useful for special control interfaces, like HTTP, RC (Remote Control), … (see below)
–aout <module> allows you to select the audio output module.
–vout <module> allows you to select the video output module.
–memcpy <module> allows you to choose a memory copy module. You should probably never touch that.
You can get a listing of the available modules by using vlc -l

Stream Output
The Stream output system allows vlc to become a streaming server.

For more details on the stream output system, please have a look at the Streaming HowTo .

 

Other Options
Audio options
–noaudio disables audio output. Note that if you are streaming (ex: to a file) this has no effect (streaming copies the audio verbatim). Use –sout-xxx instead (ex: –no-sout-audio)
–mono forces VLC to treat the stream in mono audio.
–volume <integer> sets the level of audio output (between 0 and 1024). Also only applies to local playback (like –noaudio).
–aout-rate <integer> sets the audio output frequency (Hz). By default, VLC will try to autodetect this.
–desync <integer> compensates desynchronization of audio (ms). (If audio and video streams are not synchronized, use this setting to delay the audio stream)
–audio-filter <string> adds audio filters to the processing chain. Available filters are visual (visualizer with spectrum analyzer and oscilloscope), headphone (virtual headphone patialization) and normalizer (volume normalizer)
Video options
–no-video disables video output.
–grayscale turns video output into grayscale mode.
–fullscreen ( or -f) sets fullscreen video.
–nooverlay disables hardware acceleration for the video output.
–width, –height <integer> sets the video window dimensions. By default, the video window size will be adjusted to match the video dimensions.
–start-time <integer> starts the video here; the integer is the number of seconds from the beginning (e.g. 1:30 is written as 90)
–stop-time <integer> stops the video here; the integer is the number of seconds from the beginning (e.g. 1:30 is written as 90)
–zoom <float> adds a zoom factor.
–aspect-ratio <mode> forces source aspect ratio. Modes are 4×3, 16×9, …
–spumargin <integer> forces SPU subtitles postion.
–video-filter <string> adds video filters to the processing chain. You can add several filters, separated by commas
–sub-filter <string> adds video subpictures filter to the processing chain.
Desktop/Screen grab options
You can see the various options for “grabbing the desktop” (VLC’s built-in screen grabber capture device) by using the GUI. See http://forum.videolan.org/viewtopic.php?f=4&t=46971

Playlist options
–random plays files randomly forever.
–loop loops playlist on end.
–repeat repeats current item until another item is forced
–play-and-stop stops the playlist after each played item.
Network options
–server-port <integer> sets server port.
–iface <string> specifies the network interface to use.
–iface-addr <string> specifies your network interface IP address.
–mtu <integer> specifies the MTU of the network interface.
–ipv6 forces IPv6.
–ipv4 forces IPv4.
CPU options
You should probably not touch these options unless you know what you are doing.

–nommx disables the use of MMX CPU extensions.
–no3dn disables the use of 3D Now! CPU extensions.
–nommxext disables the use of MMX Ext CPU extensions.
–nosse disables the use of SSE CPU extensions.
–noaltivec disables the use of Altivec CPU extensions.
Miscellaneous options
–quiet deactivates all console messages.
–color displays color messages.
–search-path <string> specifies interface default search path.
–plugin-path <string> specifies plugin search path.
–no-plugins-cache disables the plugin cache (plugins cache speeds up startup)
–dvd <string> specifies the default DVD device.
–vcd <string> specifies the default VCD device.
–program <integer> specifies program (SID) (for streams with several programs, like satellite ones).
–audio-type <integer> specifies the default audio type to use with dvds.
–audio-channel <integer> specifies the default audio channel to use with dvds.
–spu-channel <integer> specifies the default subtitle channel to use with dvds.
–version gives you information about the current VLC version.
–module <module> displays help about specified module. (Shortcut: -p)
Item-specific options
There are many options that are related to items (like –novideo, –codec, –fullscreen).

For all of these, you have the possibility to make them item-specific, using “:” instead of “–” and putting the option just after the concerned item.

Examples:

% vlc file1.mpg :fullscreen file2.mpg
will play file1.mpg in fullscreen mode and file2.mpg in the default mode (which is generally no fullscreen), whereas

% vlc –fullscreen file1.mpg file2.mpg
will play both files in fullscreen mode

% vlc –fullscreen file1.mpg :sub-file=file1.srt :no-fullscreen file2.mpg :filter=distort
will play file1.mpg in windowed (no-fullscreen) mode with the subtitles file file1.srt and will play file2.mpg with video filter distort enabled in fullscreen mode (item-specific options override global options).

 

Filters
These are the old style VLC filters. They only apply to on screen display and thus cannot be streamed. However, on version 1.1.11 you are still able to apply these filters in transcode module using parameter vfilter. More information can be found on Advanced Streaming Using the Command Line .

Deinterlacing video filter
Module name: deinterlace

–deinterlace-mode {discard,blend,mean,bob,linear,x,yadif,yadif (2x),phosophor,ivtc} choose a deinterlacing mode.
Invert video filter
Module name: invert

Image properties filter
Module name: adjust

–contrast <float> Image contrast in the 0-2 range.
–brightness <float> Image brightness in the 0-2 range.
–hue <integer> Image hue in the 0-360 range.
–saturation <float> Image saturation in the 0-3 range.
-gamma <float> Image gamma in the 0-10 range.
Wall video filter
Module name: wall

This filter splits the output in several windows.

–wall-cols <integer> Number of columns.
–wall-rows <integer> Number of rows.
–wall-active <string> Select the windows you want to display. To select windows 2 and 4 you would write –wall-active 2,4. When this option isn’t specified, all windows are displayed.
Video transformation filter
Module name: transform

–transform-type {90,180,270,hflip,vflip} Select rotation angle or symmetry.
Distort video filter
Module name: distort

Clone video filter
This filter clones the output window.

Module name: clone

–clone-count <integer> Number of clones.
–clone-vout-list <string> Comma separated string of video output modules.
Crop video filter
Module name: crop

–crop-geometry <string> Set the geometry of the zone to crop. This is set as <width> x <height> + <left offset> + <top offset>.
–autocrop Enable automatic black border cropping.
Motion blur filter
Module name: motionblur

blur-factor <integer> Blur factor in the 1-127 range.
Video pictures blending
Module name: blend

Video scaling filter
Module name: scale

 

Subpictures Filters
These are the new VLC filters. They can be streamed.

Time display sub filter
Module name: time

–time-format <string> Time format string. You can use the following special characters %Y = year, %m = month, %d = day, %H = hour, %M = minute, %S = second.
–time-x <integer> X offset from the left in pixels.
–time-y <integer> Y offset from the top in pixels.
Marquee display sub filter
Module name: marq

–marq-marquee <string> Marquee text to display.
–marq-x <integer> X offset from the left in pixels.
–marq-y <integer> Y offset from the top in pixels.
–marq-timeout <timeout> Defines the time the marquee must remain displayed in milliseconds. Default value is 0 (remain forever).
Logo video filter
Module name: logo

This filter can be used both as an old style filter or a subpictures filter.

–logo-file <string> Full path of the PNG file to use.
–logo-x <integer> X offset from the left in pixels.
–logo-y <integer> Y offset from the top in pixels.
–logo-transparency <integer> You can set the logo transparency value here (from 0 for full transparency to 255 for full opacity).
Note: You can move the logo by left-clicking on it.