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For a replay clip already saved on your streaming PC, use OBS Media Source. For live gameplay arriving from a second PC, consider NDI over a suitable local network. They solve different problems: local media plays a file, while NDI carries a live source across an IP network.
Choose based on where the replay is coming from
| What you want to do | Better fit | Why |
|---|---|---|
| Play a saved highlight, intro, or replay clip from the streaming PC | OBS Media Source | It plays a local audio or video file in an OBS scene, with loop and restart-on-activation controls. |
| Send live gameplay or another live video feed from a second computer | NDI | NDI carries video, audio, and metadata between systems on a network; it is not itself a codec or a replacement for OBS’s YouTube output. |
| Save the last moments of your own live session as a replay clip | OBS Replay Buffer | Replay Buffer captures recent content for saving with a configured hotkey. It is distinct from playing a saved file or sending a second PC’s feed over NDI. |
This distinction applies in India as elsewhere. The cited software documentation does not establish India-specific ISP performance, upload speeds, pricing, or availability, so choose your local network based on its actual capacity rather than an assumed regional standard.
Play a saved replay file with OBS Media Source
- Add the source: In OBS Studio, select the scene where the clip should appear, click the + button in the Sources panel, and choose Media Source.
- Choose the file: In the Media Source properties, select the local video file. Keep the file accessible at the same path whenever you use the scene.
- Set playback behavior: Enable Loop if the clip should repeat. Enable Restart playback when source becomes active when the clip should start from its beginning each time the source is activated. Leave these controls off when their behavior is not wanted.
- Check the scene: Preview the scene and confirm the clip’s picture and audio are working before streaming. Use OBS audio controls to set an appropriate level for the clip alongside game and microphone audio.
Media Source is the straightforward choice for a one-PC setup because the replay is already a file on that computer. OBS documents it as a way to play local audio and video files in scenes; this workflow recommendation is based on those documented functions, not on a hands-on comparison test. OBS Media Sources guide
Use NDI when the source is live on another PC
NDI is relevant when one computer is producing a live feed and another computer is running OBS or handling the stream. It moves the source over the local network; the streaming computer still needs its normal internet connection and streaming software to send the final program to YouTube.
#1 Best Overall
- Compact but Powerful Design: ZowieBox is smaller than a phone, featuring a tally light and LCD screen for streaming status. Capture console gameplay in up to 4K with zero-lag HDMI passthrough, while the built-in video encoder converts video for IP streaming. The IP stream can also be decoded back to a 4K HDMI signal.
- Standalone Game Streaming: Just plug and play—ZowieBox enables PC-free live gaming without affecting gameplay. As an RTMP hardware encoder and HDMI streamer, it delivers stable streaming directly from your source, making it ideal for gaming, live events, and professional broadcasting.
- NDI|HX3 Converter Technology: ZowieBox converts HDMI signals to NDI|HX3/HX2/HX, functioning as an NDI video encoder, or NDI Video Decoder for flexible IP workflows. Certified NDI technology enables low-latency gameplay streaming through OBS/vMix. Note: Encoder and decoder modes cannot run simultaneously; full NDI signals are not supported.
- UVC to HDMI Conversion: Supporting up to 4K@30fps and 1080p@60fps decoding, ZowieBox enables flexible conversion for webcam and video workflows. As a video decoder and HDMI to IP converter, it expands connectivity options for professional video devices. Note: USB capture card functionality is not currently supported.
- All-around Configuration Options: Control ZowieBox through its web UI on a PC, phone, or tablet. Manage connected PTZ cameras, tally light, video/audio, OSD, work mode, streams, network, and system settings. Support for VISCA over IP encoder workflows enables flexible PTZ control, while the dashboard provides video preview and system status.
- Confirm the two-PC workflow: Use NDI only when you need to carry a live source between networked systems. It is unnecessary for a replay file already stored on the streaming PC.
- Plan the local network: NDI says gigabit networking is essential for production workflows and lists up to 150 Mbps for a typical 1080p60 stream. That is a typical figure, not a fixed or guaranteed rate for every NDI format. NDI bandwidth varies by format and is not deterministic, so consult the requirements for the specific format and leave capacity for the rest of your network traffic.
- Prefer a wired path where practical: NDI supports wired networking. A wired gigabit LAN is a sensible starting point for a high-bandwidth two-PC workflow; that recommendation does not mean Wi-Fi cannot work, but its suitability depends on the actual network.
- Configure the NDI source and receive it in OBS: Set up the NDI workflow on the source and receiving systems, then add or select the corresponding NDI source in the receiving workflow. Available controls depend on the NDI tools and integration you use; the cited sources do not establish one universal OBS menu path or plugin version.
- Test before going live: Check that video and audio reach the receiving PC and that the network remains stable during the workload you expect. Keep the YouTube streaming output separate: NDI carries the local source, not the stream to YouTube.
For multicast NDI setups, network administration may matter. NDI advises multicast filtering such as IGMP snooping to avoid unnecessary network burden. This is a conditional consideration, not a setting every home network must change. NDI: What is NDI? · NDI bandwidth guidance · NDI for Video · NDI performance and implementation
Save a replay while gaming live
If by “replay” you mean saving the last moments of a live session, OBS Replay Buffer is a capture workflow rather than a source-transfer method. Configure Replay Buffer in OBS, set a hotkey to save the replay, and start the buffer before you need the clip. OBS also documents recording alongside streaming or offline. The resulting saved clip can later be played as a Media Source; NDI is only relevant if a live source must travel from another PC. OBS Studio Overview Guide · OBS Standard Recording Output Guide
Rank #2
- SDI NDI Encoder Decoder: Encode SDI signals to NDI or decode NDI signals to SDI. It supports NDI|HX3, NDI|HX2, and NDI|HX (Certified), but not full NDI (NDI|HB). Streamlines workflows with high-efficiency NDI|HX formats, ensuring seamless integration between different production systems. Note: ZowieBox cannot be used as an encoder and decoder at the same time. It can only switch between the two working modes, not use both modes at the same time
- AVoIP to NDI and SDI: It can decode AVoIP video streams (RTMP, RTSP, SRT) into NDI and SDI in decoding mode, seamlessly integrating diverse video sources into NDI-compatible workflows for enhanced efficiency in media production and broadcasting
- UVC to SDI Converter: Easily turn your UVC cameras into SDI cameras. With up to 1080@60fps decoding resolution, ZowieBox allows you to unfold more possibilities for webcam devices. Note: USB capture card functionality is not supported
- SDI Extender: Using two ZowieBoxes enables point-to-point transmission: one serves as an SDI encoder/transmitter, while the other functions as an SDI decoder/receiver. This setup allows SDI video signals to be transmitted via a LAN. Note: The SDI signal of ZowieBox (hardware before 10.1.13) is not compatible with ATOMAS SHOGUN INFERNO, SHOGUN ULTRA, Blackmagic Decklink Quad 2
- Standalone Live Streaming: Just plug and play, ZowieBox can stream videos PC-free, not affecting your computer performance at all. Support SRT caller/RTMP(S)/RTSP streaming protocol
Common problems and what to check
- The clip does not appear: Verify the Media Source points to the correct local file and that the file remains available at that path.
- A clip repeats unexpectedly or starts at the wrong point: Review the Media Source’s Loop and Restart playback when source becomes active settings.
- NDI video stutters or the network feels overloaded: Check the format’s bandwidth needs, the capacity of the local network, and whether a wired gigabit connection is practical. Do not assume every NDI format uses the same bandwidth.
- Multicast NDI causes excess network traffic: Check whether the network supports appropriate multicast filtering, including IGMP snooping, as NDI recommends.
- The local NDI feed works but YouTube is not receiving a live stream: NDI only moves the source across the local network. Separately check the streaming PC’s OBS output and YouTube live setup.
- You want to replay recent gameplay but have no saved file: Set up and start OBS Replay Buffer, then use its save hotkey; Media Source can play the clip after it has been saved.
Copyright and YouTube considerations
Whether footage comes from a local file or NDI does not change the need to have rights to the video and audio you broadcast. Check the permissions for game footage, music, overlays, and other material before streaming. This comparison does not establish specific YouTube policy outcomes for a particular channel or clip; review YouTube’s current rules for your circumstances.
Or let it run in the cloud
If your goal is to keep uploaded gaming videos looping as a YouTube live stream, rather than send live gameplay from a second PC, StreamNeo is a different option: upload a recording or build a playlist, add your YouTube stream key, and go live. Nothing has to stay on at home; it streams the uploaded quality up to 4K 60fps at one price per slot, and automatically recovers if YouTube drops the stream. The first day is free with no card. Monthly: $9.99 per month. For creators in India, UPI works. It streams to YouTube only and plays uploaded videos, not a live camera feed. Start the free day.
Quick Recap
Best Value
- HDMI to SRT/RTMP(S)/RTSP Encoder:Convert HDMI video sources into SRT, RTMP, or RTSP streams for real-time online broadcasting and remote production. Stream directly from cameras, gaming consoles, or other HDMI devices to platforms such as YouTube, Twitch, Facebook Live, or private streaming servers. Ideal for live events, conferences, sports, education, and professional AV applications, delivering stable, high-quality video with low latency.
- SRT/RTMP(S)/RTSP to HDMI Decoder: Decode SRT, RTMP(S), and RTSP network streams and output them through HDMI to TVs, monitors, switchers, and other video equipment. Easily bring remote cameras, drones, action cameras, or surveillance streams to local HDMI displays for real-time monitoring and playback. Ideal for sports events, press conferences, live production, and multi-display applications, providing stable HD video output and seamless integration with devices such as ATEM switchers.
- HDMI to UVC Encoder: Use an HDMI to UVC converter to connect a professional HDMI camera to your computer for high-quality video calls in meetings. It also allows you to link HDMI devices (e.g., cameras or classroom equipment) to teaching computers or projectors for better interactivity. Enables HDMI cameras or sources to connect to computers or streaming devices for high-quality live broadcasts
- UVC to HDMI Decoder: Convert UVC cameras (e.g., USB webcams, action cameras) to HDMI signals for easy connection to conference equipment or large displays or ATEM switcher, enhancing video quality and participation. In education and training, convert UVC signals to HDMI for display on large screens
- SRT/HDMI Encoder & Decoder:SRT (Secure Reliable Transport) provides secure, low-latency video transmission with enhanced stability over challenging network conditions. ZowieBox enables bidirectional conversion between HDMI and SRT streams, allowing reliable remote production, live streaming, and video contribution workflows with high-quality transmission even across long-distance networks.
Rank #4
- 4K HDMI Encoding with Loop-Through Output – Encode HDMI video up to 4096×2160p30 while using the HDMI loop-through for local monitoring or pass-through to displays and switchers.
- Multi-Protocol & Multi-Destination Streaming – Stream simultaneously via RTMP, RTMPS, SRT, NDI|HX, HLS, and TS over UDP/RTP, supporting modern broadcast and IP workflows.
- Advanced Video Processing & Overlays – Includes de-interlacing, scaling, cropping, aspect ratio conversion, and support for text, image, and clock overlays for branded output.
- Simultaneous Streaming & Recording – Record video directly to internal storage (128 GB), external USB storage, or network locations while streaming live, with support for scheduled and loop recording.
- Flexible Network & Connectivity Options – Equipped with Gigabit Ethernet with PoE and Wi-Fi 802.11 a/b/g/n/ac, plus support for 4G/5G USB modems (not supplied) for fixed or mobile deployments.
Rank #3
- 【Real-Time IP Workflow】1920×1080@60fps NDI encoder, enabling frame-accurate synchronization for live streaming teams, sports events, game streaming, and multi-camera production. The NDI encoder converts HDMI signals into full NDI video streams with latency below 65 milliseconds, ensuring seamless synchronization of video motion and fast-paced actions. Compatible with vMix/OBS/Wirecast integration.
- 【Flexible IP to Display】A bidirectional all-in-one device that functions as both an NDI encoder and NDI decoder. When used as an decoder, it converts NDI streams into 1080p60 HDMI signals. Decode NDI signals from the production console to HDMI large screens for real-time multi-camera monitoring, project vMix NDI video streams onto meeting room displays, or route live signals to broadcast monitors. Eliminate complex cabling—a single Ethernet cable can simultaneously transmit power and signals. (Select encoder or decoder mode via the NDI backend network interface).
- 【IP-Based Wiring Infrastructure】Using an HDMI-to-NDI converter, a single network cable can replace long-distance HDMI cabling (up to 100 meters), enabling both power supply (PoE+) and network transmission over a single cable, significantly simplifying on-site cabling. Also supports PoE+ or Type-C interface 5V power supply, reducing cabling costs. It is an ideal solution for educational live streaming and recording classrooms, as well as enterprise IT management IP-based production.
- 【Real-Time Status Monitoring】The HDMI decoder is equipped with a Tally indicator light and an LCD screen that displays real-time information, including IP address, network status, encoding/decoding status, video resolution, audio input/output status, and indicator light status. Without the need for a computer, you can monitor the latest program updates in real-time during live events.
- 【Real-Time Monitoring via Uncompressed HDMI Signal Loop-Out】The NDI live streaming encoder supports HDMI loop-out functionality, enabling near-zero latency signal pass-through. This allows for real-time video signal monitoring without interrupting NDI encoder processing and transmission. This provides a simpler setup solution for video production or live streaming.
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