PID remapping
The PID remapping processor changes the Packet IDs (PIDs) of the streams in the transport stream that a router output sends.
How PID remapping works
PID remapping runs on a router output. After MediaConnect routes content from a router input to the router output, the PID remapping processor transforms the transport stream before MediaConnect sends it to the output's destination. The following steps show how this works at a high level:
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Read the input structure - MediaConnect reads the tables in the incoming transport stream that describe the program and its streams.
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Apply your rules - For each stream in the program, MediaConnect applies the rules that you defined (see Rules).
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Rebuild the transport stream - MediaConnect regenerates the tables that describe the transport stream, applies additional settings at the transport stream level (see Transport stream settings), and preserves the timing information that receivers need.
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Send the output - MediaConnect sends the transformed transport stream to the output's destination.
After a route change, MediaConnect applies your rules again to the new input.
PID remapping considerations and limitations
| Consideration | Description |
|---|---|
|
Transport stream type |
Single-program transport streams (SPTS). MediaConnect sends a multiple-program transport stream (MPTS) without remapping. |
|
Changes to the transport stream structure |
When PID remapping changes the structure of the transport stream, the change might briefly interrupt downstream receivers while they adjust. |
|
PIDs outside the program |
MediaConnect replaces the packets on PIDs that aren't part of the program with null packets. |
|
PID values |
32 to 8,190. |
|
Rules |
Up to 32 rules. |
|
SMPTE ST 2022-7 |
Two router outputs with the same PID remapping settings don't produce identical streams, so a receiver can't merge them. |
Topics
