Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsTo remux an OBS recording to MP4 without re-encoding, open File > Remux Recordings, choose the recording, and click Remux. OBS copies the encoded streams into an MP4 container; it does not re-encode them. Keep the original recording until you have checked that the MP4 plays correctly in your intended editor or player.
Remux a recording in OBS
- Stop the recording. Remux the completed file, not a recording that is still being written.
- In OBS, choose File > Remux Recordings.
- Use the file picker to select one or more recordings.
- Click Remux and wait for OBS’s completion prompt.
- Open the resulting MP4 in the application where you plan to use it. Check the picture, sound, duration, and any audio tracks you need before deleting or moving the original.
OBS documents this workflow in its Standard Recording Output Guide (2023-05-26). Menu wording can vary between OBS versions, so check your installed version if the path differs.
What remuxing does—and what it cannot do
A video file has a container, such as MKV or MP4, that holds encoded video, audio, and other streams. Remuxing changes the container while copying the selected encoded streams. With stream copy, there is no decoding and re-encoding of those streams, so this operation does not add a lossy re-encoding pass. FFmpeg describes stream copy as useful for changing a container or modifying container-level metadata in its documentation.
Remuxing does not convert codecs, repair a damaged recording, resize the picture, or make unsupported streams compatible with an editor. Whether an MP4 works depends on the codecs and streams inside it, as well as the software that opens it. If the destination application cannot decode a stream, copying it into MP4 will not solve that problem. You may need a different container or a separate transcoding step that re-encodes the media.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware match#1 Best Overall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.
Set OBS to remux automatically after recording
For future recordings, open Settings > Advanced and enable Automatically remux to mp4. OBS says it remuxes the video as soon as you stop recording. Confirm the label and availability in your installed OBS version, since settings can change.
Automatic remux changes the post-recording workflow, not the recording’s codecs. Choose codecs that your target editor supports; the original MKV remains useful as a recovery copy until you have checked the MP4.
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.
Why record to MKV first
OBS recommends MKV for recording because an interrupted recording is less likely to lose the entire file. Traditional MP4 and MOV need finalization; if writing stops unexpectedly before finalization, the file may be unrecoverable. A practical routine is to record to MKV, stop cleanly, then remux to MP4 for software that prefers MP4. See OBS’s recording guide and Audio/Video Formats Guide (2023-03-26).
MP4 is not a guarantee of universal compatibility. OBS’s format guide lists H.264, HEVC, and AV1 video support for MP4, but compatibility also depends on the audio streams, container variant, and the application. Check the target software’s requirements rather than assuming every MKV recording will remux cleanly or play everywhere.
Recommended Free Tools
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.
Use FFmpeg for batch jobs or explicit stream selection
FFmpeg is useful when you want a repeatable command-line workflow or need to specify which streams to keep. First inspect the input streams and decide which video, audio, subtitle, and other tracks belong in the output. The FFmpeg documentation gives this stream-copy example:
ffmpeg -i INPUT.mkv -map 0:1 -c copy OUTPUT.mp4-map 0:1 selects the second stream in the first input; it is not a command to retain every track. -c copy copies the selected streams without decoding or encoding. For an attempt to map all input streams, a commonly used form is:
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
ffmpeg -i input.mkv -map 0 -c copy output.mp4That all-stream command is not guaranteed to work: MP4 may not accommodate every stream type, and FFmpeg notes that stream copy can fail when required target-container information is missing or the streams are incompatible. Review the input streams and any output warnings, then test the result in the intended application. Do not use stream copy as a codec-conversion fix.
Choose the workflow that fits
| Workflow | Best for | Selection and trade-offs |
|---|---|---|
| OBS manual remux | A one-off recording or a small number of existing files | Uses the OBS interface and avoids command-line setup. The output still depends on compatible streams. |
| OBS automatic remux | Regular future recordings | Remuxes after recording stops. The recording settings still determine the source container and codecs. |
| FFmpeg stream copy | Batch work or explicit stream selection | Scriptable and gives control over mapping; requires command-line familiarity and attention to stream compatibility. |
If the remux fails or the MP4 does not work
- OBS reports a remux problem: Check whether the source streams can be carried in MP4. Identify the video and audio codecs before choosing another container or transcoding.
- The MP4 opens, but the editor has no sound or is missing tracks: Recheck which streams were selected. In FFmpeg, the
-map 0:1example includes only one input stream; map the tracks you actually need and confirm the output afterward. - The MP4 does not play in the target application: Check that application’s supported codecs and audio formats. Remuxing preserves the encoded streams, so it cannot make an unsupported codec playable.
- The original recording was interrupted: An MKV is less vulnerable to losing the whole recording after an ungraceful stop than a traditional MP4/MOV, but remuxing is not a repair tool for a damaged source.
Consider Hybrid MP4 for a future OBS recording
OBS 30.2 introduced Hybrid MP4, which is written in fragmented form and finalized with a “soft-remux.” OBS describes it as aiming to combine recovery resilience with compatibility as a regular MP4 in compatible applications. Its format guide lists H.264, HEVC, and AV1 video for Hybrid MP4, while noting qualifications such as PCM compatibility. Availability and third-party support depend on your OBS version and target software; Hybrid MP4 is a recording-format option, not a way to remux an existing file. Details: OBS Hybrid MP4 & Hybrid MOV Formats (2024-06-06).
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.
Or let it run in the cloud
Remuxing prepares completed recordings; it does not keep a YouTube channel live. If your goal is to loop uploaded videos as a 24/7 YouTube stream, StreamNeo is a separate cloud service: upload a recording or build a playlist, add your YouTube stream key, and go live. Your computer and home connection do not have to stay on. It streams the uploaded file as made, up to 4K 60fps, at one flat price per slot; it also attempts automatic recovery if YouTube drops the stream. The first day is free with no card. Monthly pricing is $9.99 per month. Learn more at StreamNeo, or start your free day.
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.
