Pulled Streams; Transmuxed Streams; Transrated Streams - VBrick dme Admin Manual

P u lle d St re a m s
The Multi-protocol Streaming Server can pull live streams from an RTSP/RTP server or an
RTMP server. It can pull from various outside sources, for example from another DME, or
from a Wowza, FMS, QuickTime, or Darwin streaming server. These streams can then be
served or pushed via various protocols.
T ra n s m u xe d St re a m s
Transmuxing is the process whereby a digital bit stream is converted from one file format or
streaming protocol to another—without changing the compression method (as opposed to
transcoding which actually changes the compression method). The DME transmuxes streams;
it does not transcode streams. An example of transmuxing is when a unicast stream is
converted to multicast or when an RTP stream is converted to RTMP. The following table
shows the live input streams that are supported in the left column and the live output streams
that are supported in the top row.
Table 1. Live Transmux Capabilities
DME Output Streams
RTMP
Unicast
Pull
DM RTMP Unicast Yes
E Pull
Inp
RTMP Auto- Yes
ut
Unicast
Stre
ams
RTP Unicast Yes
Push
RTP Auto- Yes
Unicast
RTP Unicast Yes
RTSP Pull
RTP Multicast Yes
TS Unicast Push Yes
TS Unicast Yes
RTSP Pull
(3.1.1)
TS Multicast Yes
Apple HLS No
Adobe HDS No
VC SIP Yes
T ra n s ra t e d St re a m s
Transrating is the process where a digital bit stream is converted from one bit rate to another-
without changing the compression. An example of transrating is when a high bit rate stream
is converted into multiple lower bit rate streams for delivery to mobile devices. Note that the
16
RTMP RTP RTP RTP
Auto- Unicast Auto- Unicast
Unicast Push Unicast RTSP
Pull
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
No No No No
No No No No
Yes Yes Yes Yes
RTP TS TS
Multicast Unicast Unicast Multicast
Push RTSP
Pull
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
No No No No
No No No No
Yes Yes Yes Yes
TS Apple VC SIP
HLS
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
(Cache)
Yes No
(Cache)
Yes No
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