Format of an SDP file for video
v=0 o=- 3826217993 3826217993 IN IP4 10.xx.xxx.198 s=AWS Elemental SMPTE 2110 Output: [LiveEvent: 13] [OutputGroup: smpte_2110] [EssenceType_ID: 2110-20_video_198] t=0 0 m=video 50000 RTP/AVP 96 c=IN IP4 239.x.x.x/64 b=AS:2568807 a=source-filter: incl IN IP4 239.x.x.x
10.xx.xxx.2
a=rtpmap:96 raw/90000 a=fmtp:96 sampling=YCbCr-4:2:2; width=1920; height=1080; exactframerate=60; depth=10; TCS=SDR; colorimetry=BT709; interlaced; PM=2110GPM; SSN=ST2110-20:2017; TP=2110TPN; PAR=1:1; a=mediaclk:direct=0 a=ts-refclk:localmac=1c-34-da-5a-be-34
Following is information about the data in this example:
-
o=
This line identifies the source IP for the stream -
m=video
. This identifies the file as a video description.50000
is the port of the stream. This line must occur before theb
anda
lines.. -
c=
identifies the destination IP address. This is a unicast or multicast address. -
b=AS:2568807
is the bandwidth in kilobytes, and applies only for JPEG XS. -
a=source-filter
identifies a filter. This line is optional.In a file for an input to Elemental Live:
-
If the line is included, Elemental Live will listen only to the source IP (10.xx.xxx.2) for packets.
-
If the line isn't included, Elemental Live will listen to any packets on the destination IP address (239.x.x.x).
In a file for an output: Elemental Live always includes this line in any SDP file that it creates.
-
-
Width
andheight
together specify the resolution. -
Exactframerate
specifies the frames per second (fps). -
Raw
is the video compression—raw
for uncompressed video,jxsv
for JPEG XS. -
90000
is the frequency.