---
name: "vcdmplex"
section: "1"
platform: "linux"
package: "vcdtools"
version: "0.4-2"
release: "Debian 5.0 (Lenny)"
platforms: ["linux"]
url: "https://new.carta.tech/vcdmplex"
---

# vcdmplex(1)

Multiplex MPEG audio/video streams into one MPEG system stream

## NAME

vcdmplex — Multiplex MPEG audio/video streams into one MPEG system stream

## SYNOPSIS

**vcdmplex**  *video\_stream*   *audio\_stream*   *system\_stream*

## DESCRIPTION

This manual page documents briefly the  **vcdmplex** command.

This manual page was written for the **Debian GNU/Linux** distribution  because the original program does not have a manual page.

**vcdmplex** is a program that multiplexes seperate  MPEG audio and video streams into one MPEG system stream, suitable for  use with **mkvcdfs**.

## OPTIONS

- *video\_stream*

  Filename of the input MPEG video stream

- *audio\_stream*

  Filename of the input MPEG audio stream

- *system\_stream*

  Filename to output the MPEG system stream to

## NOTES

- •

  vcdmplex should be able to multiplex any MPEG video and audio streams,  not just VCD compliant streams. It can be used even for MPEG-2 video  streams, I don't know if the output adheres to any standard, however.

- •

  Messages in the form: "Inserted padding sector ..." are normal when  multiplexing VCD compliant streams, they just tell you that your actual  bitrate is slightly below VCD bitrate.

- •

  Messages: "\*\*\*\*\* BUFFER underrun - output may not play correctly \*\*\*\*\*"  are more severe, they come if the actual bitrate of your MPEG stream is  higher than the one specified in the header. The resulting system stream  might be unplayable!

- •

  If video and audio stream bitrates comply exactly with the VCD  specification (1152 KBit/s or 224 KBit/s respectivly), exactly 75  sectors/second are generated and the system stream is stuffed with  padding sectors as needed. Otherwise no padding sectors are created.

## SEE ALSO

mkvcdfs (1), cdrdao (1).

## AUTHOR

This manual page was written by Chris Butler \<chrisb@debian.org\> for  the **Debian GNU/Linux** system (but may be used by others).