AWS Cloud Digital Interface (CDI) is an SDK and transport technology that lets video applications exchange live, uncompressed media inside the AWS Cloud. It is designed for low-latency cloud production workflows, not as a consumer video format, codec, or general-purpose internet streaming protocol. AWS says its SDK uses Elastic Fabric Adapter (EFA) and Scalable Reliable Datagram (SRD) to move video between suitable EC2 instances, with latency as low as one video frame in supported deployments. AWS CDI SDK documentation
What AWS CDI is—and what it is not
CDI provides a way for compatible software endpoints to pass live video between applications running in AWS. A typical use is a cloud-based production workflow in which video must move between processing or production components with minimal latency and without first being encoded as a conventional delivery stream.
“AWS CDI” can also refer to CDI flows in AWS Elemental MediaConnect. These use the CDI transport in a managed media workflow, including connections to VPC-based sources and broadcast infrastructure. That is related to, but distinct from, the CDI SDK used by applications. Neither should be confused with SMPTE ST 2110-22, which carries JPEG XS-compressed video.
- It is: a software SDK and cloud transport approach for exchanging live media in AWS.
- It is not: a video codec, a standalone hardware product, or a public-internet streaming protocol such as one used to distribute a finished stream to viewers.
How the CDI SDK moves video
The CDI SDK transport stack uses AWS Elastic Fabric Adapter (EFA) and Scalable Reliable Datagram (SRD). AWS describes support for uncompressed UHD data rates up to 4K at 60 frames per second between EC2 instances in the same Availability Zone. That capability depends on using supported EFA-capable Nitro-based instance types and an appropriate deployment; it is not a general performance guarantee for any EC2 configuration.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#1 Best Overall
- 【1080P 60FPS Video Capture Card】 This HDMI game capture card is based on USB3.0 high speed transmission port, input resolution up to 4K@30HZ, output resolution up to 2K@30Hz or 1920×1080@60Hz. Type c and USB interface can meet most of the devices in daily life. Easily meet the online capture, real-time recording, online meetings, live gaming and other functions, so you have a better visual enjoyment. Note: For capture use only; requires capture software to function and is not intended for direct screen casting to a monitor or TV
- 【Ultra Low Latency Screen Sharing】 HDMI capture card is made of good quality aluminum alloy with strong heat dissipation, allowing you to enjoy ultra low latency while live gaming or video recording or live streaming, avoiding blue screens and lag. This HDMI to USBC capture card supports easy recording of good quality audio or HD video and transferring it to your computer or streaming platform, allowing you to record 60 fps HD video directly on your hard drive and real-time preview
- 【Plug and Play, Easy to Carry】 This HDMI 1080P video capture card does not require any additional drivers or external power supply, just plug and play for fast capture. The capture card is small and lightweight, so you can put it in your bag for emergencies, making it very portable for outdoor live streaming. It's also a great way to share content in game recording, video conference, video recorder and online teaching
- 【Wide Compatibility USB Capture Card】 Easily streams to Facebook, Youtube or Twitch. With the connection, this HDMI to USB C/3.0 video capture devices can be working on several Operating Systems and various software: Windows 7/ 8/ 10, Mac OS or above, Linux, Android, Laptop, Xbox One, PS3/PS4/PS5, Camera, DVDs, Set Top Box, Webcame, DSLR, Switch/Switch 2, TV BOX, HDTV, Potplayer/VLC, ZOOM, OBS Studio etc.
- 【Package Content & Note】 1x HD Audio Capture Card , 1x USB 3.0 to USB C Adapter (A-side 3.0, B-side 2.0), 1x user manual. Please note that you need to restart the OBS Studio software after the audio setup is complete, otherwise it will result in no sound output. When using an adapter, if the device is recognized as USB 2.0, try using the other side with the USB-C port. Simply flip the capture card and reconnect it to be recognized as USB 3.0
Latency and buffering
AWS describes SDK transport latency as low as a single frame of video. The actual latency depends on deployment details, including endpoint proximity and buffering. AWS notes that additional frame buffering may be needed in some arrangements.
The guide also states a performance goal of no more than one dropped frame in a 24-hour period. This is AWS’s stated goal for the SDK, not a guaranteed outcome for every workload or network layout.
Placement and instance requirements
AWS recommends clustered placement groups for optimal CDI SDK performance. A clustered placement group is not suitable or possible for every interoperability scenario, so topology may require a trade-off between proximity and connectivity to other systems. EFA is available only on a limited set of Nitro-based EC2 instance types; verify current instance support and regional availability before designing around it.
Rank #2
- 【1080P HD High Quality】Capture resolution up to 1080p for video source and it is ideal for all HDMI devices such as PS4, PS3, Xbox One, Xbox 360, Wii U, DVDs, DSLR, Camera, Security Camera and set top box. Note: Video input supports 4K30/60Hz and 1080p120/144Hz. Does not support 4K120Hz/144Hz. Output supports up to 2K30Hz.
- 【Plug and Play】No driver or external power supply required, true PnP. Once plugged in, the device is identified automatically as a webcam. Detect input and adjust output automatically. Won't occupy CPU, optional audio capture. No freeze with correct setting.
- 【Compatible with Multiple Systems】suitable for Windows and Mac OS. High speed USB 3.0 technology and superior low latency technology makes it easier for you to transmit live streaming to Twitch, Youtube, Facebook, Twitter, OBS, Potplayer and VLC.
- 【HDMI LOOP-OUT】Based on the high-speed USB 3.0 technology, it can capture one single channel HD HDMI video signal. There is no delay when you are playing game live.
- 【Support Mic-in for Commentary】Rybozen capture card has microphone input and you can use it to add external commentary when playing a game. Please note: it only accepts 3.5mm TRS standard microphone headset.
See the AWS CDI SDK guide for current implementation requirements and its getting-started and integration materials.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesCDI SDK versus a MediaConnect CDI flow
| Option | What it does | Key constraint |
|---|---|---|
| CDI SDK | Lets applications exchange live video within AWS using the CDI transport stack. | Requires compatible software endpoints, supported EFA-capable EC2 instances, and a suitable network and placement arrangement. |
| MediaConnect CDI flow | Uses AWS Elemental MediaConnect to transport high-quality uncompressed or lightly compressed media to or from a VPC-based workflow. | A CDI flow requires a source in a VPC configured using Amazon VPC; topology and supported source/output interfaces matter. |
For a MediaConnect flow, the VPC is part of the transport design, not an optional detail. Review AWS’s instructions for creating a flow that uses a CDI source before choosing endpoints.
CDI and SMPTE ST 2110: choose the right media path
SMPTE ST 2110 is a family of standards for separate media streams. In AWS’s product documentation, ST 2110-20 is the uncompressed-video path, while ST 2110-22 uses JPEG XS to carry lightly compressed video. They are different from one another and should not be described as interchangeable CDI modes.
Rank #3
- 【4K HDMI Input, 2K@30Hz Recording】Powered by a true USB 3.0 high-speed interface, the capture card supports up to 4K@30Hz HDMI input and records at 2K@30Hz or 1080P@60Hz. Perfect for gamers, streamers, and professionals who need crisp, smooth video for live streaming, gameplay recording, or online meetings.
- 【Ultra Low Latency Screen Sharing】Built with a premium aluminum alloy shell and advanced chipset for stable heat dissipation, ensuring ultra-low latency transmission. Capture high-quality video and dual-channel audio in real time—no lag, no frame drop—ideal for Twitch, YouTube, or OBS streaming.
- 【Easy Plug and Play, Compact & Portable】No driver or external power required—just plug and play via USB 3.0 or Type-C connection to your Windows or macOS computer. Lightweight and compact design makes it easy to carry for outdoor streaming, live shows, or mobile recording setups.
- 【Wide Compatibility & Multi-Device Support】Compatible with Windows 7 8 10 11, macOS, Linux,Android and supports most popular software such as OBS, Zoom, VLC, Twitch Studio, and more. Works seamlessly with PS4, PS5, Xbox, Switch, DSLR cameras, TV boxes, and other HDMI-output devices for streaming to YouTube, Twitch, etc.
- 【What You Get】Includes: HDMI Capture Card, USB 3.0 to USB-C Adapter, User Manual. Tips: Make sure your tablet’s OTG function is enabled before connecting. Test your HDMI device with a monitor first to confirm video and audio output, then connect to the Video Capture Card for recording.
| Path | Video treatment | Where it fits |
|---|---|---|
| CDI / ST 2110-20 | Uncompressed video | Workflows prioritizing uncompressed media transport and able to support the associated network capacity. |
| ST 2110-22 with JPEG XS | Lightly compressed video | Workflows that need to reduce bandwidth, including some contribution links. |
MediaConnect also documents media streams for audio and ancillary data, but its supported stream types are product-specific; it does not support every ST 2110 media type. Likewise, AWS Elemental Live’s supported content describes that product’s implementation, not the full SMPTE standards. Its documentation lists uncompressed SD, HD, and 4K video in progressive or interlaced 4:2:2 10-bit profiles, and JPEG XS SD/HD in progressive or interlaced 4:2:2 8-, 10-, or 12-bit profiles. Consult the relevant product tables for the workflow being built: MediaConnect media streams, Elemental Live and SMPTE 2110, and Elemental Live supported content.
Plan the topology before choosing CDI
CDI’s suitability depends on where the media starts, where it must go, and what connects those locations. For a cloud-only application workflow, consider instance support, Availability Zone placement, and buffering. For a broadcast contribution workflow, also account for the boundary between on-premises infrastructure and AWS.
Free tools Windows power users keep installed
One-click scans. No signup required.
On-premises contribution
AWS’s MediaConnect contribution example describes bridging on-premises SDI, 2022-6, or 2110 networks with VPC CDI using Direct Connect. The required interfaces and network path depend on the source and destination protocols. The example also identifies JPEG XS over ST 2110-22 as an option to reduce Direct Connect bandwidth.
Rank #4
- High-Quality Video Capture, 4K HDMI Capture Card Ready: Capture smooth and vibrant video with this 4K HDMI capture card, engineered for gamers and content creators who demand crisp 1080P 60FPS video quality. Whether you're streaming to Twitch or recording gameplay for YouTube, your footage will look professional and detailed
- Plug-and-Play USB Capture Card, No Drivers Needed: Designed as a USB capture card for streaming, this device works instantly out of the box, just plug into your PC or laptop and start capturing. Fully compatible with popular software like OBS Studio, Streamlabs, and XSplit, making setup quick and stress-free for beginners and pros alike
- Universal Compatibility PS5, Xbox, Switch & More: Stream or record gameplay from virtually any HDMI-enabled device including Nintendo Switch, PS5, Xbox Series X, DSLR cameras, and PCs. The video capture card for gaming supports seamless passthrough so you can play without lag while your audience watches every frame in real time
- Low-Latency Performance for Smooth Streaming: This capture card for streaming minimizes delay between gameplay and broadcast, so you get reliable, low-latency capture that works well for competitive gaming, live broadcasts, and podcast sessions. Suitable for those building their channel with high-quality, engaging content
- Compact & Portable Design for Content Creators: Lightweight and portable, this USB 3.0 capture card works well for creators who travel or switch gaming setups often. Throw it in your bag and stream or record wherever you are, at home, events, LAN parties, streaming or studio sessions
Availability Zone boundaries
In the cited MediaConnect workflow, CDI outputs do not support transfers between Availability Zones. AWS points to ST 2110 JPEG XS outputs when cross-AZ delivery is required. Treat this as a topology decision to resolve early: changing the protocol path can affect compression, bandwidth, and endpoint compatibility. See AWS’s MediaConnect contribution example.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What CDI costs
AWS states that the CDI SDK itself has no fees. That does not make a deployed workflow cost-free: an implementation may use EC2, MediaConnect, Direct Connect, VPC networking, and other AWS services, each with its own applicable charges. There is no single workflow price established here; estimate the services and data paths in your own architecture using current AWS pricing before deployment.
When AWS CDI is a good fit
- Your production or processing applications run in AWS and need to exchange live video with low latency.
- Your workflow benefits from uncompressed media and can provision the supported EC2, EFA, placement, and network configuration.
- You are integrating a VPC-based cloud workflow with broadcast contribution infrastructure through a managed service such as MediaConnect.
Consider another path when the network cannot provide the capacity needed for uncompressed video, when endpoints cannot use compatible AWS infrastructure, or when cross-Availability-Zone delivery conflicts with the CDI output constraints. ST 2110-22 with JPEG XS may help reduce bandwidth, but confirm that the precise source, output, and product profiles in your design are supported.
How to get started safely
- Map the media path. Identify every source and destination, whether they are applications in AWS, MediaConnect endpoints, or on-premises broadcast systems. Mark VPC and Availability Zone boundaries.
- Choose the transport boundary. Use the CDI SDK for application-to-application exchange; evaluate a MediaConnect CDI flow when the workflow needs managed VPC media transport or external contribution connectivity.
- Check compatibility. Confirm EFA support for the selected EC2 instance types, placement-group feasibility, flow source and output support, and the exact video, audio, and ancillary-data types required.
- Budget for bandwidth and services. Compare uncompressed transport with JPEG XS over ST 2110-22 where supported, and estimate current EC2, MediaConnect, Direct Connect, and networking charges for the actual design.
- Prototype and measure. Validate end-to-end latency, buffering, dropped-frame behavior, and recovery under the conditions your production will use. AWS’s latency and dropped-frame statements are product goals or capabilities, not deployment guarantees.
- Use AWS’s implementation guides. Start with the CDI SDK getting-started guide and the relevant MediaConnect CDI source instructions.
Common design problems and fixes
| Problem | Likely cause | What to check |
|---|---|---|
| Throughput or frame delivery falls short of expectations | Unsupported instance, unsuitable placement, insufficient proximity, or additional buffering needs. | Verify EFA-capable Nitro instance support, same-AZ placement for the documented 4K60 capability, clustered placement feasibility, and end-to-end measurements. |
| A MediaConnect CDI flow cannot use the intended source | The source is not in the required configured VPC or the chosen interface is incompatible. | Review the VPC setup and the flow creation requirements for the exact source and output. |
| CDI output cannot reach a destination in another Availability Zone | The cited MediaConnect CDI output path does not support inter-AZ transfer. | Rework the topology or assess the documented ST 2110 JPEG XS output option for cross-AZ delivery. |
| Bandwidth demand is too high for the contribution link | Uncompressed video consumes more network capacity than the link can provide. | Evaluate ST 2110-22 with JPEG XS where supported and confirm the resulting profile is acceptable to both endpoints. |
| Audio or ancillary data is missing | The required stream type may not be supported in the selected MediaConnect or Elemental product path. | Check the product-specific media-stream and supported-content tables rather than assuming universal ST 2110 support. |
Or let it run in the cloud
AWS CDI is for moving media between production applications in AWS; it is not a way to keep an uploaded YouTube video playing continuously. For that separate use case, StreamNeo keeps an uploaded recording or playlist live on YouTube from the cloud: upload the video, add your YouTube stream key, and go live. Nothing has to stay on at home; it streams your upload at its original quality up to 4K 60fps for one flat price per slot, automatically recovers if YouTube drops the stream, and the first day is free with no card. Monthly: $9.99 per month. Start your free day with StreamNeo.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
