mplex
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 Howto and the man-page of the mplex tool documents the properties of this element, which are shared with the mplex tool.
Example pipeline
 gst-launch-1.0 -v videotestsrc num-buffers=1000 ! mpeg2enc ! mplex ! filesink location=videotestsrc.mpg
This example pipeline will encode a test video source to an MPEG1 elementary stream and multiplexes this to an MPEG system stream.
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.
Hierarchy
GObject ╰──GInitiallyUnowned ╰──GstObject ╰──GstElement ╰──mplex
Factory details
Authors: – Andrew Stevens 
Classification: – Codec/Muxer
Rank – none
Plugin – mplex
Package – GStreamer Bad Plug-ins
Pad Templates
audio_%u
        audio/mpeg:
    mpegversion: 1
          layer: [ 1, 3 ]
       channels: [ 1, 8 ]
           rate: [ 8000, 96000 ]
audio/x-ac3:
       channels: [ 1, 8 ]
           rate: [ 8000, 96000 ]
audio/x-dts:
audio/x-raw:
         format: { S16BE, S20BE, S24BE }
           rate: { (int)48000, (int)96000 }
       channels: [ 1, 6 ]
video_%u
        video/mpeg:
    mpegversion: { (int)1, (int)2 }
   systemstream: false
          width: [ 16, 4096 ]
         height: [ 16, 4096 ]
      framerate: [ 0/1, 2147483647/1 ]
Properties
bufsize
“bufsize” gint
Target decoders video buffer size (kB) [default determined by format if not explicitly set]
Flags : Read / Write
Default value : 0
format
“format” GstMplexFormat *
Encoding profile format
Flags : Read / Write
Default value : mpeg-1 (0)
mux-bitrate
“mux-bitrate” gint
Bitrate of output stream in kbps (0 = autodetect)
Flags : Read / Write
Default value : 0
packets-per-pack
“packets-per-pack” gint
Number of packets per pack for generic formats
Flags : Read / Write
Default value : 1
sector-size
“sector-size” gint
Specify sector size in bytes for generic formats
Flags : Read / Write
Default value : 2048
system-headers
“system-headers” gboolean
Create system header in every pack for generic formats
Flags : Read / Write
Default value : false
vbr
“vbr” gboolean
Whether the input video stream is variable bitrate
Flags : Read / Write
Default value : false
Named constants
GstMplexFormat
Members
mpeg-1 (0) – Generic MPEG-1
        vcd (1) – Standard VCD
        vcd-nsr (2) – User VCD
        mpeg-2 (3) – Generic MPEG-2
        svcd (4) – Standard SVCD
        svcd-nsr (5) – User SVCD
        vcd-still (6) – VCD Stills sequences
        svcd-still (7) – SVCD Stills sequences
        dvd-nav (8) – DVD MPEG-2 for dvdauthor
        dvd (9) – DVD MPEG-2
        atsc-480i (10) – ATSC 480i
        atsc-480p (11) – ATSC 480p
        atsc-720p (12) – ATSC 720p
        atsc-1080i (13) – ATSC 1080i
        The results of the search are