| Top |  |  |  |  | 
| gint | bufsize | Read / Write | 
| GstMplexFormat | format | Read / Write | 
| gint | mux-bitrate | Read / Write | 
| gint | packets-per-pack | Read / Write | 
| gint | sector-size | Read / Write | 
| gboolean | system-headers | Read / Write | 
| gboolean | vbr | Read / Write | 
This element is an audio/video multiplexer for MPEG-1/2 video streams and (un)compressed audio streams such as AC3, MPEG layer I/II/III. It is based on the mjpegtools library. Documentation on creating MPEG videos in general can be found in the
MJPEG Howtoand the man-page of the mplex tool documents the properties of this element, which are shared with the mplex tool.
| 1 | gst-launch-1.0 -v videotestsrc num-buffers=1000 ! mpeg2enc ! mplex ! filesink location=videotestsrc.mpg | 
If several streams are being multiplexed, there should (as usual) be a queue in each stream, and due to mplex' buffering the capacities of these may have to be set to a few times the default settings to prevent the pipeline stalling.
| plugin | mplex | 
| author | Andrew Stevens <andrew.stevens@nexgo.de> Ronald Bultje <rbultje@ronald.bitfreak.net> Mark Nauwelaerts <mnauw@users.sourceforge.net> | 
| class | Codec/Muxer | 
| name | audio_%u | 
| direction | sink | 
| presence | request | 
| details | audio/mpeg, mpegversion=(int)1, layer=(int)[ 1, 3 ], channels=(int)[ 1, 8 ], rate=(int)[ 8000, 96000 ] | 
| audio/x-ac3, channels=(int)[ 1, 8 ], rate=(int)[ 8000, 96000 ] | |
| audio/x-dts | |
| audio/x-raw, format=(string){ S16BE, S20BE, S24BE }, rate=(int){ 48000, 96000 }, channels=(int)[ 1, 6 ] | 
| name | video_%u | 
| direction | sink | 
| presence | request | 
| details | video/mpeg, mpegversion=(int){ 1, 2 }, systemstream=(boolean)false, width=(int)[ 16, 4096 ], height=(int)[ 16, 4096 ], framerate=(fraction)[ 0/1, 2147483647/1 ] | 
| name | src | 
| direction | source | 
| presence | always | 
| details | video/mpeg, systemstream=(boolean)true | 
“bufsize” property“bufsize” gint
Target decoders video buffer size (kB) [default determined by format if not explicitly set].
Flags: Read / Write
Allowed values: [20,4000]
Default value: 46
“format” property  “format”                   GstMplexFormat
Encoding profile format.
Flags: Read / Write
Default value: DVD MPEG-2
“mux-bitrate” property“mux-bitrate” gint
Bitrate of output stream in kbps (0 = autodetect).
Flags: Read / Write
Allowed values: [0,15360]
Default value: 0
“packets-per-pack” property“packets-per-pack” gint
Number of packets per pack for generic formats.
Flags: Read / Write
Allowed values: [1,100]
Default value: 1
“sector-size” property“sector-size” gint
Specify sector size in bytes for generic formats.
Flags: Read / Write
Allowed values: [256,16384]
Default value: 2048
“system-headers” property“system-headers” gboolean
Create system header in every pack for generic formats.
Flags: Read / Write
Default value: FALSE
“vbr” property“vbr” gboolean
Whether the input video stream is variable bitrate.
Flags: Read / Write
Default value: FALSE