Open Media Transport (OMT) Metadata Specification Document 1.0

This document contains recommended metadata specifications for use with Open Media Transport.

If you have a specification you would like to see listed here, submit a request under this repositories Issues section.

Contents

• Web Management
• PTZ Control
• Ancillary Data
• Metadata Grouping

Web Management

This defines a web management interface for a sender device.

Receivers should implement a way to browse to this address on request.

<OMTWeb URL="http://x.x.x.x/" />

PTZ Control

This defines what PTZ protocol is available for a PTZ camera device. The following supported protocols are currently defined:

Sony VISCA over IP

This is the standard VISCA over IP udp protocol implemented separately to OMT.

<OMTPTZ Protocol="VISCAoverIP" URL="visca://x.x.x.x:port"  />

Sony VISCA (Inband)

This is the standard VISCA over IP protocol encapsulated within OMT metadata. Sequence is the same sequence number as used in the original protocol messages.

Command

This is a command sent from controller to camera in hexadecimal format.

<OMTPTZ Protocol="VISCA" Sequence="22" Command="8101040700FF" />

Reply

This is a reply from camera sent back to controller and is in hexadecimal format.

<OMTPTZ Protocol="VISCA" Sequence="22" Reply="0011AABBCC" />

Ancillary Data

The following is a proposal for sending and receiving raw SDI ancillary data over OMT. This should ideally be sent in per frame metadata with grouping as per Metadata Grouping below.

Payload is in hexadecimal format.

<AncillaryData xmns="urn:anc:1.0">
<Packet did="45" sdid="01" field="1" line="21" horizOffset="0" st2110Channel="0" pts90k="32109876" link="A" stream="VANC">
<Payload>81010A011E0000</Payload>
</Packet>
</AncillaryData>

Metadata Grouping

To send multiple disparate pieces of metadata within a single frame, use the following grouping syntax.

<OMTGroup>
<OMTPTZ Protocol="VISCA" Sequence="22" Reply="0011AABBCC" />
<AncillaryData xmns="urn:anc:1.0">
<Packet did="45" sdid="01" field="1" line="21" horizOffset="0" st2110Channel="0" pts90k="32109876" link="A" stream="VANC">
<Payload>81010A011E0000</Payload>
</Packet>
</AncillaryData>
</OMTGroup>

Since grouping may not exist when only a single element is sent, it is recommended that any parsing code look for both formats.