invalid SDP: sdp: invalid syntax `c=IN `

[messiahxu]

Which version are you using?

1.15.1

Which operating system are you using?

Linux amd64 standard

Describe the issue

cam model Uniview IPC2A4L-FW-APF40-V1-DT

[RTSP source] invalid SDP: sdp: invalid syntax c=IN

Describe how to replicate the issue

cam model Uniview IPC2A4L-FW-APF40-V1-DT

[RTSP source] invalid SDP: sdp: invalid syntax c=IN

MediaMTX configuration

logLevel: info
logDestinations: [file]
logFile: /etc/mediamtx/mediamtx.log

readTimeout: 10s
writeTimeout: 10s
writeQueueSize: 4096
udpMaxPayloadSize: 1472

authMethod: internal

authInternalUsers:

• user: any
  pass:
  ips: []
  permissions:
  • action: publish
    path:
  • action: read
    path:
  • action: playback
    path:
• user: any
  pass:
  ips: ['127.0.0.1', '::1']
  permissions:
  • action: api
  • action: metrics
  • action: pprof

api: yes
metrics: no
pprof: no
playback: no

rtsp: yes
protocols: [udp, multicast, tcp]
encryption: "no"
rtspAddress: :8554
rtspAuthMethods: [basic]

rtmp: yes
rtmpAddress: :1935
rtmpEncryption: "no"

hls: yes
hlsAddress: :8887
hlsEncryption: no
hlsAllowOrigin: '*'

hlsAlwaysRemux: yes
hlsVariant: lowLatency
hlsSegmentCount: 7
hlsSegmentDuration: 1s
hlsPartDuration: 200ms
hlsSegmentMaxSize: 50M
hlsMuxerCloseAfter: 60s

webrtc: yes
webrtcAddress: :8889
webrtcEncryption: no
webrtcAllowOrigin: '*'
webrtcLocalUDPAddress: :8189

srt: yes
srtAddress: :8890

pathDefaults:
source: publisher
sourceOnDemand: no
sourceOnDemandStartTimeout: 10s
sourceOnDemandCloseAfter: 10s
rtspTransport: automatic #tcp

paths:
D13:
source: rtsp://admin:123456@172.16.116.242:554/video1

MediaMTX logs

2025/09/26 14:19:50 ERR [path D13] [RTSP source] invalid SDP: sdp: invalid syntax c=IN

Network dump

No response

[pikachu937]

I confirm, there is a problem. Similar to the one in invalid sdp #5008

Cam model

Uniview IPC2122LB-SF28K-A

Conf

paths:
  # example:
  # my_camera:
  #   source: rtsp://my_camera
  test:
    source: rtsp://admin:123456@10.0.0.1:554/media/video1


  # Settings under path "all_others" are applied to all paths that
  # do not match another entry.
  all_others:

Log

2025/09/26 18:25:41 INF MediaMTX v1.15.1
2025/09/26 18:25:41 INF configuration loaded from /root/15/mediamtx.yml
2025/09/26 18:25:41 INF [metrics] listener opened on :9998
2025/09/26 18:25:41 DEB [path test] created
2025/09/26 18:25:41 DEB path manager created
2025/09/26 18:25:41 INF [RTSP] listener opened on :8554 (TCP), :8000 (UDP/RTP), :8001 (UDP/RTCP)
2025/09/26 18:25:41 INF [path test] [RTSP source] started
2025/09/26 18:25:41 INF [API] listener opened on :9997
2025/09/26 18:25:41 DEB [path test] [RTSP source] connecting
2025/09/26 18:25:41 DEB [path test] [RTSP source] [c->s] OPTIONS rtsp://10.0.0.1:554/media/video1 RTSP/1.0
CSeq: 1
User-Agent: gortsplib


2025/09/26 18:25:41 DEB [path test] [RTSP source] [s->c] RTSP/1.0 200 OK
CSeq: 1
Public: OPTIONS,DESCRIBE,SETUP,PLAY,PAUSE,TEARDOWN,ANNOUNCE,SET_PARAMETER,GET_PARAMETER


2025/09/26 18:25:41 DEB [path test] [RTSP source] [c->s] DESCRIBE rtsp://10.0.0.1:554/media/video1 RTSP/1.0
Accept: application/sdp
CSeq: 2
User-Agent: gortsplib


2025/09/26 18:25:41 DEB [path test] [RTSP source] [s->c] RTSP/1.0 401 Unauthorized
CSeq: 2
WWW-Authenticate: Digest realm="c4790503a344",nonce="9cc0d9033c90551cac758f838ad30131", stale="FALSE"


2025/09/26 18:25:41 DEB [path test] [RTSP source] [c->s] DESCRIBE rtsp://10.0.0.1:554/media/video1 RTSP/1.0
Accept: application/sdp
Authorization: Digest username="admin", realm="c4790503a344", nonce="9cc0d9033c90551cac758f838ad30131", uri="rtsp://10.0.0.1:554/media/video1", response="b1f83280246573fc2848cfc584d68ab9"
CSeq: 3
User-Agent: gortsplib


2025/09/26 18:25:41 DEB [path test] [RTSP source] [s->c] RTSP/1.0 200 OK
CSeq: 3
Content-Base: rtsp://10.0.0.1:554/media/video1
Content-Length: 452
Content-Type: application/sdp

v=0
o=- 1001 1 IN
s=VCP IPC Realtime stream
m=video 0 RTP/AVP 105
c=IN
a=control:rtsp://10.0.0.1/media/video1/video
a=rtpmap:105 H264/90000
a=fmtp:105 profile-level-id=640028; packetization-mode=1; sprop-parameter-sets=Z2QAKKw7UDwBE/LCAAAH0AAA6mEI,aOqPLA==
a=recvonly
m=application 0 RTP/AVP 107
c=IN
a=control:rtsp://10.0.0.1/media/video1/metadata
a=rtpmap:107 vnd.onvif.metadata/90000
a=fmtp:107 DecoderTag=h3c-v3 RTCP=0
a=recvonly

2025/09/26 18:25:41 ERR [path test] [RTSP source] invalid SDP: sdp: invalid syntax `c=IN `
2025/09/26 18:25:46 DEB [path test] [RTSP source] connecting
2025/09/26 18:25:46 DEB [path test] [RTSP source] [c->s] OPTIONS rtsp://10.0.0.1:554/media/video1 RTSP/1.0
CSeq: 1
User-Agent: gortsplib


2025/09/26 18:25:46 DEB [path test] [RTSP source] [s->c] RTSP/1.0 200 OK
CSeq: 1
Public: OPTIONS,DESCRIBE,SETUP,PLAY,PAUSE,TEARDOWN,ANNOUNCE,SET_PARAMETER,GET_PARAMETER


2025/09/26 18:25:46 DEB [path test] [RTSP source] [c->s] DESCRIBE rtsp://10.0.0.1:554/media/video1 RTSP/1.0
Accept: application/sdp
CSeq: 2
User-Agent: gortsplib


2025/09/26 18:25:46 DEB [path test] [RTSP source] [s->c] RTSP/1.0 401 Unauthorized
CSeq: 2
WWW-Authenticate: Digest realm="c4790503a344",nonce="7c6cf43322962d9d0aa9d92a47945489", stale="FALSE"


2025/09/26 18:25:46 DEB [path test] [RTSP source] [c->s] DESCRIBE rtsp://10.0.0.1:554/media/video1 RTSP/1.0
Accept: application/sdp
Authorization: Digest username="admin", realm="c4790503a344", nonce="7c6cf43322962d9d0aa9d92a47945489", uri="rtsp://10.0.0.1:554/media/video1", response="68119097005331e3392e5121eaec9980"
CSeq: 3
User-Agent: gortsplib


2025/09/26 18:25:46 DEB [path test] [RTSP source] [s->c] RTSP/1.0 200 OK
CSeq: 3
Content-Base: rtsp://10.0.0.1:554/media/video1
Content-Length: 452
Content-Type: application/sdp

v=0
o=- 1001 1 IN
s=VCP IPC Realtime stream
m=video 0 RTP/AVP 105
c=IN
a=control:rtsp://10.0.0.1/media/video1/video
a=rtpmap:105 H264/90000
a=fmtp:105 profile-level-id=640028; packetization-mode=1; sprop-parameter-sets=Z2QAKKw7UDwBE/LCAAAH0AAA6mEI,aOqPLA==
a=recvonly
m=application 0 RTP/AVP 107
c=IN
a=control:rtsp://10.0.0.1/media/video1/metadata
a=rtpmap:107 vnd.onvif.metadata/90000
a=fmtp:107 DecoderTag=h3c-v3 RTCP=0
a=recvonly

2025/09/26 18:25:46 ERR [path test] [RTSP source] invalid SDP: sdp: invalid syntax `c=IN `
2025/09/26 18:25:48 INF shutting down gracefully
2025/09/26 18:25:48 INF [API] listener is closing
2025/09/26 18:25:48 INF [RTSP] listener is closing
2025/09/26 18:25:48 DEB path manager is shutting down
2025/09/26 18:25:48 INF [path test] [RTSP source] stopped: path is closing
2025/09/26 18:25:48 DEB [path test] destroyed: terminated
2025/09/26 18:25:48 INF [metrics] listener is closing
2025/09/26 18:25:48 INF waiting for running hooks

Dump

10.0.0.1_19_00_28_26_09_2025.pcap.zip

@aler9 Please help 😀