invalid sdp syntax b=TIAS:1000 on RTSP stream

[davidhu2000]

Which version are you using?

v0.18.4

Which operating system are you using?

• Linux amd64 standard
• Linux amd64 Docker
• Linux arm64 standard
• Linux arm64 Docker
• Linux arm7 standard
• Linux arm7 Docker
• Linux arm6 standard
• Linux arm6 Docker
• Windows amd64 standard
• Windows amd64 Docker (WSL backend)
• macOS amd64 standard
• macOS amd64 Docker
• Other (please describe)

Describe the issue

The announce request is sending a param in SDP

b=TIAS:10000

and getting

 (invalid SDP: sdp: invalid syntax `b=TIAS:10000` (b=TIAS:10000))

according to the specification, https://datatracker.ietf.org/doc/html/rfc3890#section-6.2, b=TIAS:<number> should be valid.

Describe how to replicate the issue

1. start the server via

RTSP_RTSPADDRESS=:1935 RTSP_PROTOCOLS=tcp RTSP_RTMPADDRESS=:1936 RTSP_LOGLEVEL=debug ./rtsp-simple-server

Note: we have a legacy app that streams to port 1935 via RTSP, so we had to override the default

2. make an announce request using the SDP data below

Did you attach the server logs?

2022/05/20 02:31:00 INF rtsp-simple-server v0.18.4
2022/05/20 02:31:00 INF [metrics] listener opened on 127.0.0.1:9998
2022/05/20 02:31:00 DEB path manager created
2022/05/20 02:31:00 INF [RTSP] listener opened on 0.0.0.0:1935 (TCP)
2022/05/20 02:31:00 INF [RTMP] listener opened on 0.0.0.0:8555
2022/05/20 02:31:00 INF [HLS] listener opened on :8888
2022/05/20 02:31:00 INF [API] listener opened on 127.0.0.1:9997
2022/05/20 02:33:05 INF [RTSP] [conn 127.0.0.6:51267] opened
2022/05/20 02:33:05 DEB [RTSP] [conn 127.0.0.6:51267] [c->s] OPTIONS rtsp://<URL>:1935/1234 RTSP/1.0
CSeq: 1
User-Agent: user-agent


2022/05/20 02:33:05 DEB [RTSP] [conn 127.0.0.6:51267] [s->c] RTSP/1.0 200 OK
CSeq: 1
Public: DESCRIBE, ANNOUNCE, SETUP, PLAY, RECORD, PAUSE, GET_PARAMETER, TEARDOWN
Server: gortsplib


2022/05/20 02:33:05 DEB [RTSP] [conn 127.0.0.6:51267] [c->s] ANNOUNCE rtsp://<URL>:1935/1234 RTSP/1.0
CSeq: 2
Content-Length: 419
Content-Type: application/sdp
User-Agent: user-agent

v=0
o=- 1681692777 1681692777 IN IP4 127.0.0.1
s=Video Stream
c=IN IP4 <URL>
t=0 0
a=control:*
m=video 0 RTP/AVP 96
b=TIAS:10000
a=maxprate:2.0000
a=control:trackid=1
a=rtpmap:96 H264/90000
a=mimetype:string;"video/H264"
a=framesize:96 384-832
a=Width:integer;384
a=Height:integer;832
a=fmtp:96 packetization-mode=1;profile-level-id=64001f;sprop-parameter-sets=J2QAH6xWwYBp+kA=,KO48sA==

2022/05/20 02:33:05 INF [RTSP] [session 269342001] created by 127.0.0.6:51267
2022/05/20 02:33:05 DEB [RTSP] [conn 127.0.0.6:51267] [s->c] RTSP/1.0 400 Bad Request
CSeq: 2
Server: gortsplib


2022/05/20 02:33:05 INF [RTSP] [conn 127.0.0.6:51267] closed (invalid SDP: sdp: invalid syntax `b=TIAS:10000` (b=TIAS:10000))

Did you attach a network dump?

no

[aler9]

Hello, what's the name of the client you're using to make the ANNOUNCE request?

[aler9]

Anyway, if TIAS is standardized, it will be supported.

[davidhu2000]

@aler9 so it's a mobile app where we coded the request in. we have a class that sends the ANNOUCE request. Not sure if that answers you question. I can try to collect more info next week if you need more information.

[davidhu2000]

i've been trying to track down the error, seems like it's coming from

https://github.com/pion/sdp/blob/b42baf9f9c1399a1e642c7cc3522a43862673ba4/unmarshal.go#L565

but I'm not certain.

[aler9]

added in v0.18.5.

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