Media Updates & Release Notes

Realtime

The WebSocket adapter for Cloudflare's Realtime SFU is now generally available. The SFU (selective forwarding unit) is managed WebRTC infrastructure for live audio, video, and data across Cloudflare's global network in 330+ cities ↗︎.

The adapter connects live calls to any server that accepts WebSockets, such as a Durable Object. It delivers uncompressed pulse-code modulation (PCM) audio and JPEG video frames. Your backend can process this media without implementing a WebRTC client.

What you can build

• Transcribe or record call audio, or let a voice agent hear and respond to participants. The AI audio example uses Durable Objects and Workers AI for transcription and speech generation. Separate adapters receive PCM audio and send generated speech back to participants.
• Analyze images or build previews from live video. The WebRTC-to-JPEG example ↗︎ sends a browser's camera stream to a Durable Object as JPEG frames at one frame per second by default.

What changes for existing integrations …

Cloudflare Images

You can now view account-level analytics for your Images transformation usage.

Go to Images & Stream > Transformations > Analytics to view sampled estimates of image transformation request traffic, including:

• Requests by source, split between URL-based transformations and Images binding transformations
• Top zones, transformation configurations, and origin hosts for URL-based requests
• Top Worker scripts for Images binding requests

Use these analytics to identify the zones, configurations, origins, and Workers generating the most image transformation requests.

Cloudflare Images

We've added more ways to manage and manipulate images with the Images binding. Here's what's new:

Render text into an image. Output a string of text into its own image or draw it over another image.

• Use the .text() method to rasterize text with the Images binding.
• Style content using the font, size, and color options.
• The draw array in cf.image now accepts a text key.

Manage hosted images without an API token.

• Metadata filtering: Pass filter.metadata to .list() to return images by custom metadata. Match a bounded range by setting two operators in one condition, for example, priority: { gte: 2, lte: 5 }.
• Server-side signing: Get a signed URL for a private image with .signedUrl().
• User uploads: Create a Direct Creator Upload link with .createDirectUpload() so that a client can upload an image to your storage.

Set headers in a single call. …

Realtime

Cloudflare Realtime SFU is a WebRTC selective forwarding unit that runs on Cloudflare's global network. It forwards audio, video, and application data between WebRTC clients without requiring you to manage SFU infrastructure or regions.

DataChannels are WebRTC channels for application messages. A client publishes a named DataChannel to Realtime SFU, and the SFU forwards its messages to every client that subscribes to that channel. Use DataChannels for low-latency payloads such as chat messages, game state, sensor updates, and control events.

What changed

Realtime SFU DataChannels now support unordered and partially reliable delivery. DataChannels remain reliable and ordered by default, so existing channels keep their current behavior.

With ordered delivery, a delayed message can block later messages. For game state or sensor updates, recent data may be more useful than recovering an older message. Unordered delivery lets later messages proceed, while partial reliability limits retransmission attempts or the transport's retry window.

Choose delivery behavior

Delivery settings answer two questions: whether newer messages can bypass a delayed message, and when the transport should stop retrying delivery. …

Stream

You can now rotate the broadcast credentials for a Stream live input without changing the live input identifier.

Use key rotation when live input credentials may have been shared with the wrong audience, exposed in client code or a screenshare, or need to be refreshed as part of your security process. Rotating keys revokes the old credentials, disconnects broadcasts using stale credentials, and returns refreshed credentials in the API response.

To rotate keys for a live input, make a POST request to the rotate_keys endpoint:

curl --request POST \
https://api.cloudflare.com/client/v4/accounts/{account_id}/stream/live_inputs/{live_input_identifier}/rotate_keys \
--header "Authorization: Bearer <API_TOKEN>"

Live input responses now also include keysRotatedAt, which indicates when the live input keys were last rotated. This field is omitted for live inputs whose keys have never been rotated.

For endpoint details, refer to Rotate keys for a live input. For usage guidance, refer to Manage live inputs.