DOT & Transportation Video

RTSP-to-HLS transcoding with packet loss reconstruction for field cameras on cellular. 511 public portals, ATMS integration, and multi-state sharing from a single platform.

Built on WINK Forge (transcoding) and WINK Media Router (distribution). Handles the network impairment that destroys other transcoders.

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The Field Camera Problem

Why Traffic Cameras Are Hard

Field cameras on cellular/wireless have:

Packet loss - 1-5% typical, spikes to 15%+ during congestion
Jitter - 50-200ms variation, sometimes more
Intermittent connectivity - Temporary outages, reconnects
Variable bandwidth - Drops during peak hours

Standard transcoders fail: green screens, frozen frames, audio desync, crashes.

How Forge Handles It

Packet loss reconstruction - Recovers video from damaged streams using temporal prediction and error concealment
Adaptive jitter buffer - Dynamically adjusts to network conditions
Stream persistence - Automatic reconnect with state preservation
H.264 bias - We recommend H.264 over H.265 for error resilience. Here's why.

Architecture

Input Protocols

RTSP/RTP - UDP or TCP interleaved
RTMP - For encoder push
SRT - ARQ-based for lossy networks
ONVIF - Camera discovery and control
Genetec SDK - Native Security Center integration

Codecs

H.264/AVC (recommended for field cameras)
H.265/HEVC (controlled environments only)
Pass-through when possible (no re-encode)

Output Protocols

HLS - 6s segments default, LL-HLS available
MPEG-DASH - Multi-bitrate ABR
WebRTC - Sub-second latency
RTSP - Re-stream to partner VMS
RTMP - CDN ingest

Authentication

OTP tokens for HLS URLs
JWT for API access
IP whitelist for RTSP output

511 & Public Portal Integration

Public Distribution

Branded web portals - Embed HLS player with your state branding
Mobile apps - iOS/Android via WINK LiveView
Map integration - GeoJSON camera locations, click-to-view
Road condition overlay - Integrate with RWIS data

ATMS Integration

Iteris/Econolite - Embed video in existing TMC interfaces
Video walls - WINK Wall for control rooms
Incident detection - Trigger from analytics events
API - RESTful access for custom integrations

Multi-State Sharing

Corridor Coordination

Share cameras across state lines for I-95, I-10, etc. Each state maintains ownership, grants access to neighbors. No credential sharing required.

Emergency Access

Time-limited access grants during incidents. Auto-expire after event. Full audit trail for compliance.

Media Partnerships

Provide RTSP/HLS feeds to TV stations. Watermarking optional. Usage tracking for reporting.

Deployment

Cloud

AWS/Azure, managed by WINK. Elastic scaling for public events. CDN distribution for public 511 portals. Start in days, not months.

On-Premise

900PS hardware or vForge virtual appliances. Data stays in your network. Connect to cloud for public distribution only.

Hardware sizing guide

Technical Resources

Forge Manual

Configuration, RTSP/SRT setup, Genetec integration.

View Manual

Media Router Manual

Distribution, OTP auth, partner sharing.