To convert an OBS recording to MP4 without another encoding pass, use OBS’s built-in remux tool: open File > Remux Recordings, select the recording, and click Remux. OBS copies the encoded streams into an MP4 container; it does not change their codecs or fix compatibility problems. Keep the original recording until you have checked the MP4 in the app where you plan to use it.
Remux an existing OBS recording in the interface
- Stop the recording. Remux the completed file, and do not delete or overwrite the original yet.
- In OBS, choose File > Remux Recordings.
- In the file picker, select the recording you want to convert. You can select more than one recording for a batch.
- Click Remux and wait for OBS’s completion prompt.
- Open the resulting MP4 in your intended editor or player. Check that the picture, sound, duration, and any audio tracks you need are present before removing the source file.
The OBS Project documents this workflow in its Standard Recording Output Guide. Menu wording can vary by OBS version, so check the menus in your installed version if the labels differ.
What remuxing does—and what it does not do
A video file has a container (such as MKV or MP4) and encoded streams inside it, such as video and audio. Remuxing changes the container while copying the selected streams, rather than decoding and encoding them again. As a result, remuxing itself adds no quality loss from a new encoding pass and is generally quick, although no speed benchmark is established here. FFmpeg describes stream copy as useful for changing a container or modifying container-level metadata in its documentation.
Because the streams are copied, remuxing does not repair a damaged recording, change resolution, convert a codec, or make an unsupported audio or video codec playable in a particular editor. MP4 compatibility depends on the streams and on the software that opens the file. If remuxing fails or the destination app rejects the output, identify the source codecs and check what that app supports. You may need a different container or a separate transcode, which does decode and re-encode the streams and can affect quality.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#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.
Automatically remux future recordings to MP4
For recurring recordings, OBS can remux to MP4 as soon as you stop recording:
- Open Settings > Advanced in OBS.
- Enable Automatically remux to mp4.
- Apply the setting. After a future recording stops, OBS performs the remux automatically.
The OBS Project documents this option in its recording guide. Confirm the setting’s availability and wording in your installed OBS version.
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.
Use FFmpeg for batch work or explicit stream selection
FFmpeg’s -c copy option copies streams without decoding or encoding. Its documentation gives this example:
ffmpeg -i INPUT.mkv -map 0:1 -c copy OUTPUT.mp4Here, -map 0:1 selects the second stream in the first input; it does not mean “keep every video and audio track.” To attempt to copy all input streams, use:
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.
ffmpeg -i input.mkv -map 0 -c copy output.mp4Inspect the input streams and read FFmpeg’s output for warnings. Not every stream type can be carried into MP4, and stream copy can fail if the target container lacks required information or cannot accommodate a stream. Consult the FFmpeg documentation for stream mapping and options. If a destination app cannot decode a copied codec, this command will not make it compatible.
Why record to MKV before making an MP4
For recordings, OBS recommends MKV because an interrupted recording is less likely to lose the whole file. Traditional MP4 and MOV require finalization and may be unrecoverable if writing is interrupted before that happens. A practical workflow is to record to MKV, then remux after the recording is complete. See the OBS Project’s Standard Recording Output Guide and Audio/Video Formats Guide.
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
OBS’s format guide lists H.264, HEVC, and AV1 video for MP4, but codec and audio compatibility can vary across container variants and third-party applications. The list is not a guarantee that every editor supports every resulting file; check the requirements for your target app.
Consider Hybrid MP4 for a future recording
Hybrid MP4 is a recording-format option documented by OBS as introduced in OBS 30.2. It writes fragmented data during recording and uses a “soft-remux” to finalize it, aiming to combine resilience during recording with a regular MP4 for compatible applications. The OBS Project lists H.264, HEVC, and AV1 video for Hybrid MP4 and qualifies PCM compatibility; software support still matters. This option concerns how a future recording is made, not how to remux an existing file. Check your OBS version and target app before choosing it. Details: OBS Hybrid MP4 & Hybrid MOV Formats.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →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.
Choose the workflow that fits
| Workflow | Best suited to | Control and compatibility |
|---|---|---|
| OBS manual remux | A one-off recording or a small batch | Uses the OBS interface; the copied streams must still be compatible with MP4 and the destination app. |
| OBS automatic remux | Future recordings you want in MP4 after stopping | Runs when recording stops; the recording’s format and codec choices still determine what is being copied. |
| FFmpeg stream copy | Batch jobs, scripts, or deliberate stream selection | Offers explicit mapping but requires command-line familiarity and care with multiple streams and MP4 compatibility. |
Troubleshooting remux problems
- OBS reports an error or produces no usable MP4: Keep the source file. Check whether its streams can be carried into MP4; unsupported stream types or missing container information can prevent stream copy. Try a compatible container or transcode if the target app requires a different codec.
- The MP4 opens, but there is no sound or a track is missing: Check which audio streams were in the source and, if using FFmpeg, whether your
-mapoption selected them. Verify the output in the intended app. - The editor rejects the MP4: Remuxing preserved the codec rather than converting it. Compare the file’s video and audio codecs with the editor’s supported formats; changing the container again will not convert an unsupported codec.
- A recording was interrupted: Try the original recording in OBS or a compatible player and retain it while assessing recovery. OBS recommends MKV for this risk because an interrupted traditional MP4/MOV may not be recoverable if finalization did not complete.
Or let it run in the cloud
Remuxing is for converting completed recordings. If your goal is instead to keep a YouTube channel live 24/7 from uploaded videos, StreamNeo runs the stream in the cloud:
- Upload a recording or build a playlist.
- Add your YouTube stream key once.
- Go live; StreamNeo loops the uploaded video from the cloud.
Your computer and home connection do not have to stay on. Each slot streams uploaded video as made, up to 4K 60fps, at one flat price per slot; automatic recovery starts if YouTube drops the stream. The first day is free with no card, one free day per account. Monthly billing is $9.99 per month. StreamNeo is for YouTube streams from uploaded videos, not camera broadcasts. Visit 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.
