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	TransMux

TransMux combines multiple MPEG, video with MPEG, DTS, AAC, or AC3 audio streams into a fully synchronized HD or SD MPEG-2 transport, MPEG-2 program, or MPEG-1 system stream. Running under Windows and MacOS, TransMux can also demultiplex MPEG multiplexed streams into their elementary components.

TransMux includes a rich set of user parameters that optimize multiplexing overhead to create the highest quality MPEG streams for use in HDTV desktop, video on demand, streaming, or HDTV systems.


Multiplexing strategies optimized for a variety of MPEG system types can be saved and utilized in TransMux’s batch mode of operation.

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The MPEG specifications detail the system header fields that must be included in the multiplexed stream. But the specifications leave great flexibility into the distribution of video, audio and system elements within the multiplexed streams. MPEG streams are used in a very wide range of applications: from fixed bit-rate video broadcast systems, to variable bit-rate desktop storage media (CD and DVD), to changeable bit-rate internet video. Most multiplexers available today have a fixed set of multiplexing parameters and can not be optimized for individual applications. TransMux not only provides a complete set of multiplexing parameters, but also provides visibility into the multiplexing operation. This enables a multiplexing operation that is tightly coupled to the end user environment.

TransMux can also be run in a batch mode permitting automatic multiplexing of a large group of files. Upon start up, TransMux reads a parameter file that can contain customized settings for each set of files to be multiplexed. The batch mode provides a convenient way to work with the other PixelTools products to encode video and audio clips and multiplex them into system streams with specific audio, video, and multiplexing parameters — automatically without operator intervention.

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Specifications


Operating Systems:
Windows XP, Windows ME, Windows 2000, Windows NT and Windows 98
MacOS 10.4
Manages files larger than 2Gbytes under the NTFS or OSX file systems

Input:
MPEG-2 or MPEG-1 video streams: Layers 1, 2, 3 (VBS, MPV, and MPG files)
Second video stream into transport
MPEG-2 or MPEG-1 audio streams (ABS, MPA, and MPG files)
Second audio stream into transport  
Dolby, AC3 audio steams

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Multiplexing:
Comprehensive set of user selectable parameters
Bytes per packet: 1 to 65,536 bytes
Packets per pack: 1 to 2 GHz packets
System headers: In first pack only, or in each pack
Multiplexed bit-rates: 400 to 500,000,000 bits per sec.
Video delay 0 to 4,000 milliseconds. (relative to system clock)
Audio delay: 0 to 4,000 milliseconds. (relative to system clock)
System stream headers: MPEG-1 or MPEG-2 headers
User selection of video and audio PID
User selection of Program Map Table (PMT) PID
User selection of Program Clock Reference (PCR) PID
Creation of video only or audio only transport streams

Demultiplexing:
Inputs MPEG-2 transport program or system streams

Output:
ISO-11172-1 MPEG-1 or ISO-13818-1 MPEG-2 program stream (MPG file)
Outputs elementary video streams at user selected program identification (PID)
Outputs elementary audio streams at user selected program identification (PID)

Statistics
Text window that displays detailed information on the video and audio files being multiplexed, multiplexing system component bit-rates, and multiplexing status.

User Help Facilities:
On line help with detailed explanation of the multiplexing parameters
Comprehensive User Manual.

Specification update:
See PixelTools home page at www.pixeltools.com for latest specification update on TransMux.
TransMux is a trademark of PixelTools Corporation. All other brand names are trademarks or registered trademarks of their respective holders

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