RTSP, RTP, RTCP, and SDP trace analysis

Follow session setup and packet flow in a synthetic media trace. Use the observations to identify which protocol layer needs further investigation.

Sources and scopeSource record 25 August 2026

Technical source record: 25 August 2026. Check the linked documentation for current product requirements.

Offline research and planning only; product or deployment acceptance belongs to separately governed environment validation.

Verification and testing

On this page

Overview#

Lab class: Offline synthetic trace

RFC 7826 and RFC 8866 are the current RTSP 2.0 and SDP bases. RFC 2326 (RTSP 1.0) and RFC 4566 (older SDP) remain useful only when a captured or synthetic fixture explicitly uses those installed legacy versions.

Procedure#

Identify RTSP version; don't assume RTSP 1.0 and 2.0 are interchangeable.
Follow request/response pairs using CSeq and session identifiers; record authentication and URI exposure.
Parse SDP media, connection, payload type, rtpmap/fmtp, control URI, direction and timing fields.
Determine RTP over UDP, multicast, TCP interleaving or another negotiated path.
Track one SSRC's sequence and timestamp space; distinguish packet loss, reordering, duplication and capture loss.
Use RTCP sender/receiver reports to interpret timing and reported loss without treating them as authenticated truth in an unprotected session.
Map payload format to codec/framing and confirm receiver limits.
Identify whether control and media have confidentiality/integrity, and where credentials/tokens appear.

Expected artefacts#

session flow diagram;
SDP field table and resolved control/media endpoints;
transport and port/multicast map;
sequence/loss/reordering note;
authentication/encryption boundary;
explicit capture and version limitations.

Evidence checklist#

Fixture provenance, digest, protocol versions, and codec mapping recorded
RTSP 1.0 and 2.0 semantics not mixed
SDP version and resolved control/media endpoints recorded
Capture gaps distinguished from protocol loss and reordering
Authentication, confidentiality, integrity, and interpretation limits documented

Sources#

RFC 7826 RTSP 2.0, current RTSP base, accessed 25 August 2026.
RFC 8866 SDP, current SDP base, accessed 25 August 2026.
RFC 2326 RTSP 1.0, accessed 25 August 2026.
RFC 3550 RTP, accessed 25 August 2026.
RFC 4566 SDP, obsolete legacy baseline, accessed 25 August 2026.

Section overview · Wiki home