Table of Contents
Let’s take a look at the latest Red5 Pro release following our previous blog about Red5 Pro v15.4.0. Red5 Pro v15.5.1 introduces powerful new features, including RTX support for both WHIP and WHEP video streams and Terraform instance type failover for applications hosted on OCI, along with bug fixes to help you build stronger real-time streaming workflows.
Need a custom Red5 Pro feature developed or want to prioritize a development request? We’re known for our flexibility – contact us to discuss your needs.
What’s New in Red5 Pro v15.5.1?
Here is what you need to know about the Red5 Pro v15.5.1 update announced on May 19, 2026.
New Features
- WHIP plugin now supports RTX (RFC 4588 — RTP Retransmission) for both WHIP and WHEP video streams: The WHIP plugin now supports RTX, the standard browser-native packet repair mechanism in WebRTC, for both WHIP ingest and WHEP playback. On the egress side (WHEP), the server allocates a paired RTX SSRC, buffers cleartext RTP packets, and retransmits on NACK in under one RTT significantly reducing visual artifacts on lossy networks. On the ingest side (WHIP), the server echoes the publisher’s RTX offer and strips retransmitted packets before the depacketizer, preventing publisher-side loss from propagating downstream. RTX is enabled by default and fully configurable via webrtc-plugin.properties, including per-direction switches, buffer caps, and bandwidth limits. Supports single-layer and multi-layer simulcast (3 RID layers), and gracefully degrades for clients that don’t advertise RTX.
- Terraform Instance Type Failover: as-terraform now supports a comma-separated list of instance types in node group configurations (e.g., instance_type=VM.Standard.E4.Flex-1-4,VM.Standard.E5.Flex-1-4), with improved failover logic to automatically try the next instance type if the primary is unavailable. Available for applications hosted on Oracle Cloud Infrastructure.
Bug Fixes
- Mixer could freeze source stream in some circumstances.
- Streaming could fail to resume when restarting Origin nodes.
- SRT streams could fail to publish.
- SRT ingested streams could initiate with invalid video timestamps.
- HLS segments could stop uploading to shared storage.
- JPEG files might not appear in AWS bucket for published streams.
- Mixer could crash when stream pulling begins.
- Timestamps could drift in interstitial processing.
Conclusion
Red5 Pro v15.5.1 improves usability and reliability for real-time streaming workflows. With two new capabilities and several bug fixes, this release expands streaming and infrastructure management options for developers, startups, and enterprises.
Product marketing manager with experience at software companies, startups, and enterprises in the live streaming industry since 2018. Her core expertise is SEO, but she also collaborates closely with the product development team to integrate marketing into Red5 solutions and drive adoption. She supports growth through go-to-market strategies, release announcements, email campaigns, case studies, sales enablement materials, social media, and other channels.
