MPEG-TS

PID - TS Packet identifier

Elementary streams (video, audio) and information tables are packed to the TS-packets. Each packet has unique identifier - PID.

PID value should be in range from 0 to 8191. Range from 0 to 31 and 8191 preallocated and shouldn't used for elementary streams. For elementary streams possible to use any PID in range from 32 to 8190.

How to find PID values in the stream?

CBR/VBR - Bitrate

Stream bitrate has two types:

To generate CBR streams in Astra append the cbr option into the output address. Value should be in Kbit/s. For example:

udp://239.255.1.1:1234#cbr=8000
Note: the "no_sync" option disables CBR
For versions below 5.63 - the CBR option must be used in conjunction with the "sync" option"

If stream bitrate higher than "cbr" value, then stream passed as is. Option works only for UDP-output. For any other formats no reason to use CBR.