The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Looping a church-service video does not automatically cause high CPU usage. First identify whether the load comes from video encoding, media decoding, rendering, or a complex OBS scene. Then change the setting that matches the bottleneck: enable hardware decoding for a supported Media Source, simplify the scene, or move encoding from x264 to a supported GPU encoder.
Find out what is using the CPU
OBS performs several different jobs at once. A video file must be decoded for playback; the scene must be composed and rendered; and the finished output must be encoded for streaming or recording. High CPU use can come from any of these, so changing the encoder will not necessarily fix a decoding or scene-rendering problem.
- Open OBS Stats and note CPU use, rendering lag, and encoding lag while the service video is playing.
- If practical, compare a short run with the loop disabled against one with the loop running, then compare those with streaming or recording enabled.
- Change one thing at a time and observe the same representative scene. That makes it easier to tell whether a change helped and to spot a new playback, sync, or image-quality problem.
There is no reliable universal percentage of CPU savings for any one setting. Results depend on the computer, encoder, output resolution and frame rate, media format, and scene complexity.
Set up the loop for the kind of service video you have
One prerecorded file
- In the OBS scene, add a Media Source and select the service recording.
- In the Media Source properties, enable Loop to repeat the file.
- Check how the source behaves when it is hidden, such as when switching scenes, and test a full loop so you can confirm playback and audio work as intended.
OBS documents the Media Source loop control and supported media options in its Media Sources guide.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
A playlist of recordings
- Add a VLC Video source and select the files for the playlist.
- Enable Loop Playlist in the source properties.
- If VLC Video is unavailable, install the VLC version that matches the OBS installation, then reopen OBS and check again.
VLC Video offers playlist looping, but it depends on VLC being installed. For a single file, a Media Source is the simpler option. OBS describes both source types in its Media Sources guide.
Try hardware decoding for the video file
For a Media Source, open its properties and enable Use hardware decoding when available. This can move supported media decoding from the CPU to the GPU, but it is conditional: the file format and hardware must support it, and it may not reduce CPU use on every computer.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
After enabling it, play the service video on the actual streaming computer. Check that the image plays smoothly and that audio remains in sync. If playback becomes less reliable, turn the option off again. The setting is documented by OBS in its Media Sources guide.
Reduce unnecessary scene and source work
Even sources that are not currently visible can use resources. A scene collection with many duplicated or unnecessary sources, or several demanding browser sources, can add work beyond the loop itself.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
- Remove sources you no longer use and simplify scenes and collections where possible.
- Reduce the number and dimensions of browser sources. If a graphic is static, consider using an image source instead.
- Use video media at a resolution appropriate to the stream output rather than oversized files that must be scaled down.
- Keep the elements the congregation needs to see, such as readable lyrics and service details; simplify decoration before sacrificing essential content.
These are workload reductions, not guaranteed CPU fixes. OBS discusses source and scene costs in its encoding performance troubleshooting guide.
If x264 encoding is the bottleneck, test a hardware encoder
If OBS Stats points to encoding lag and OBS is using x264, try a compatible hardware encoder—such as NVENC, AMF, or QSV, depending on the computer and platform. In OBS, check Settings → Output and choose an available hardware encoder for the streaming or recording output you are using. The exact options depend on the installed hardware and OBS setup.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Hardware encoding can take video-encoding work off the CPU. OBS Project generally recommends hardware encoders for performance because a dedicated GPU component can encode more efficiently than the x264 software encoder. However, encoder generation matters: older hardware encoders may deliver lower image quality than x264’s default veryfast preset at the same bitrate. Compare the result using a representative scene and the bitrate you actually intend to use; do not assume the CPU benefit makes the quality tradeoff worthwhile. See OBS’s hardware encoding guidance.
Keep the encoder, bitrate, and output settings in context
A lower bitrate is not, by itself, a guaranteed way to reduce CPU use: the encoder and the amount of video work matter, and lowering bitrate can reduce image quality. Likewise, changing resolution or frame rate may reduce workload but can make lyrics or service details harder to read or motion less smooth. The right comparison is the actual output at the quality your service requires, not a setting chosen in isolation.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
There is no single resolution, frame rate, bitrate, or keyframe value that can be recommended from the information available about your computer, service footage, and streaming destination. Check the destination’s current streaming requirements for any required output values, then test changes in OBS. OBS notes that CPU requirements vary with encoder, resolution, frame rate, and scene complexity in its system requirements.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When a hardware upgrade may help
Consider a graphics card with an OBS-supported hardware encoder only after you have confirmed that x264 encoding—not media decoding, rendering, or scene complexity—is the CPU bottleneck. Verify the exact card revision, operating-system support, driver compatibility, available case space, and power supply before buying. A model name alone does not establish that a specific card will work in an unknown church computer.
OBS lists examples of compatible NVIDIA generations, including GeForce 750 Ti / 900-series (Maxwell) or higher for NVENC, and recommends sixth-generation NVENC (Turing), including GTX 1650 rev 2 and higher. Confirm the exact revision and that the encoder is available in your current OBS installation; these examples do not guarantee compatibility with your system. See the OBS hardware encoding page and system requirements.
Common problems and what to check
- CPU stays high even with the loop disabled: Look for encoding lag, rendering lag, or other active sources in Stats. Simplify the scene and test streaming or recording separately rather than assuming the loop is responsible.
- Hardware decoding makes playback worse: The format or hardware may not support the path well. Disable the option and compare playback and sync again.
- VLC Video is missing: Check that VLC is installed and matches the OBS installation, then reopen OBS.
- Switching scenes disrupts the video: Check the Media Source visibility behavior and test the transitions you use during a service.
- Hardware encoding lowers image quality: Compare the encoder at the intended bitrate. Older encoder generations can have a quality tradeoff; return to x264 or adjust the workload if the output is not acceptable.
- CPU remains high after changing the encoder: Recheck decoding, rendering, source count, browser sources, media resolution, and output workload. A hardware encoder addresses encoding work, not every OBS task.
For a detailed checklist from OBS, see Encoding Performance Troubleshooting.
Recommended Free Tools
Or let it run in the cloud
If your church service is a prerecorded video for a YouTube channel, StreamNeo is a cloud option: upload the video, add your YouTube stream key, and go live. It plays uploaded videos rather than broadcasting a live camera feed. Nothing at home has to stay on; it streams the upload as made, up to 4K 60fps, at one price per slot; and it automatically recovers if YouTube drops the stream. The first day is free with no card. Monthly pricing is $9.99 per month.
Quick Recap
See StreamNeo or start the free first day.
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.
