For a continuous local recording of a 24/7 stream, choose a format that can remain usable if OBS or the computer stops unexpectedly. OBS recommends MKV for most recording use; Hybrid MP4 is another documented choice when you need MP4 compatibility and your OBS version and codecs support it.
That protects against one particular problem: an interrupted recording write. It does not prevent disk failure, accidental deletion or every kind of corruption, and it does not make a separate backup unnecessary. Choose the container, codecs and quality together, then plan where the completed files will live and how valuable ones will be copied.
Choose a format for continuous local recording
A recording container is the file wrapper that holds encoded video and audio. It affects whether a file can be finalised after recording stops, which players and editors can open it, and which codec combinations it can contain. It does not itself determine the visual quality of the stream; that depends on your encoder and its settings.
For an always-on channel, the key question is what happens if the writing process is interrupted. A power cut, operating-system crash or forced shutdown can leave the current recording unfinished. Formats that rely on a final step before they can be played may be difficult or impossible to use after such an interruption. Formats designed to remain readable while unfinished reduce that specific risk, but they cannot guarantee recovery in every failure.
Start in OBS at Settings > Output and look at the Recording section. The labels and available choices can vary with OBS version and output mode, so check what your installation actually offers. If keeping the largest possible portion of an interrupted recording is your priority, MKV is the straightforward starting point. If you need a broadly compatible MP4 file immediately, investigate Hybrid MP4 and test it with your actual codec and editor before relying on it.
Keep the local recording separate in your mind from the broadcast sent to YouTube. The stream can continue while a local disk fills, or a local recording can stop while the live broadcast carries on. If your workflow involves playing a prepared playlist through OBS, the practical details in how to loop Punjabi music videos in OBS help explain the source side of a continuous channel; they do not replace checking the recording output independently.
Why OBS recommends MKV for most uses
OBS's Standard Recording Output Guide recommends MKV when unforeseen issues could prevent recording from stopping gracefully. The Audio/Video Formats Guide describes MKV as a failsafe option and says an unfinished recording remains playable and recoverable. The important qualification is that this is the documented behaviour of the format and OBS workflow, not a promise that every file will survive every sort of failure.
MKV is a useful default when the computer may run unattended for long periods. If OBS closes unexpectedly, you may still be able to play or process the recording created up to that point, rather than losing the entire file because the finalisation step did not happen. That makes it a sensible direct-recording container for a long session where interruption is in scope.
There is a compatibility trade-off. Some video editors and consumer players do not handle MKV as conveniently as MP4, even when the encoded video and audio themselves are supported. A file being recoverable does not mean every editing application will accept it without conversion. Before choosing MKV for a daily workflow, make a short test recording with the same encoder and audio tracks you intend to use, then open it in the player or editor that matters to you.
OBS says MKV supports every encoder combination available in OBS. That makes it more flexible than some container choices, but it is still worth checking the downstream application. If an editor rejects your MKV file, OBS can remux the recording into an MP4 copy after the recording ends. Remuxing changes the container without re-encoding the streams, so it is not the same as exporting a newly compressed video. The steps are covered below.
When Hybrid MP4 may fit
Regular MP4 and MOV recordings need finalisation to be playable. OBS warns that if writing is interrupted, such a file may not be recoverable. That makes regular MP4 a poor default for a long direct recording when a crash or power loss is one of the problems you are planning around.
OBS's Hybrid MP4 and Hybrid MOV options use fragmented writing and then perform a soft-remux finalisation for broader compatibility. OBS documents Hybrid MP4 as recoverable after an aborted write. Hybrid formats may suit you when the file needs to be more convenient in an MP4-oriented workflow while retaining different interruption behaviour from regular MP4. Availability and supported combinations depend on your OBS version and selected codecs; Hybrid MP4 is available in OBS 30.2 and later.
Check the exact format guide for the combination you plan to record. OBS documents Hybrid MP4 video support for H.264, HEVC and AV1; Hybrid MOV supports H.264, HEVC and ProRes. Audio support differs too, including limited PCM compatibility in Hybrid MP4. Do not infer that a container option supports every audio or video setting just because OBS lets you select it. A short test recording can reveal whether your configuration records and opens as expected.
Use Hybrid MP4 when MP4 convenience is important and your planned codecs and editor are compatible. Use MKV when broad encoder flexibility and OBS's recommended approach to unexpected stops matter more than opening the raw file directly in every application. Neither choice replaces a second copy, and neither means you can ignore the recording status or remaining disk space.
Match the format to codecs and editing needs
Make the choice in this order: identify the codecs OBS will write, identify the application that must open the file, then decide how much interrupted-recording resilience matters for the original. The codec is the encoded picture or sound; the container is the wrapper. Compatibility requires both to line up with the editor or player.
| Recording choice | Interrupted-write behaviour in OBS guidance | Compatibility consideration | A practical fit |
|---|---|---|---|
| MKV | OBS recommends it for unexpected stops; unfinished files can remain playable and recoverable | Supports every OBS encoder combination, though an editor may not accept MKV directly | Long originals when flexibility and recovery matter |
| Regular MP4/MOV | Requires finalisation; OBS warns an interrupted write may leave it unrecoverable | Often convenient for sharing or editing, but finalisation is the concern during direct recording | Completed exports or workflows where interruption risk is not the deciding factor |
| Fragmented MP4/MOV | Avoids the same finalisation dependency as regular MP4/MOV | Confirm the chosen app accepts the fragmented form | A specific workflow that needs fragmented output and has been tested |
| Hybrid MP4/MOV | OBS describes recovery after an aborted write and uses soft-remux finalisation | Supported codecs vary; Hybrid MP4 and Hybrid MOV are not interchangeable | MP4-oriented use where the OBS version, codecs and editor have been verified |
This comparison is about OBS's documented format behaviour, not an independent stress test of uninterrupted day-and-night operation. Make a short test with representative video, audio and any extra tracks, then stop OBS normally and inspect the output. If you need to know how it behaves after an interruption, test only with a disposable recording and a controlled procedure; do not risk a valuable source file just to simulate failure.
Your editor may also have its own preferred intermediate or delivery format. If you make changes after recording, keep the original until you have checked the converted or edited copy. A remuxed MP4 can be more convenient without changing the compressed video, but it cannot fix an unsupported codec or turn a low-quality source into a higher-quality one. For a channel built around a prepared video loop, the workflow in creating a continuous pre-recorded YouTube channel for a school is relevant to source preparation; recording-container decisions still depend on your local editing needs.
Set path and quality with disk growth in mind
In Settings > Output, select a recording path on a disk with sufficient free space. Use a location you can recognise later, not a temporary folder or a drive that is routinely disconnected. If the operating system and recordings share one disk, account for space needed by both. OBS's recording guide covers recording output options, but it does not prescribe a complete backup architecture for a 24/7 channel.
Long sessions turn small per-hour storage differences into a meaningful retention decision. Estimate the space your own settings use by recording a representative sample for a known interval and checking the file size. Use that observation to work out whether the disk can hold the period you want to retain, while leaving room for other files and continued operation. The result will depend on the content, codec, encoder settings and audio, so avoid treating another channel's file size as a reliable estimate for yours.
Quality presets also have resource and storage costs. OBS's Recording Encoder Presets Guide says the Lossless preset uses the CPU encoder and produces very large files, around 7 GB per minute. That published figure is OBS's estimate for the preset, not a prediction for every setup. Lossless is rarely a sensible casual setting for a continuous channel unless you have a specific need and have planned for the resulting storage and CPU demand.
The Indistinguishable preset can require more storage and affect older or weaker hardware. Choose a setting that preserves enough detail for your material without forcing the machine to encode at a level it cannot sustain alongside the live output. A static devotional visual, a lofi animation and a local news loop do not necessarily need the same recording quality. Run a representative test while the live setup is operating, and observe whether the computer remains responsive and the recording is produced as expected.
Write down a retention rule before the disk is nearly full: for example, which recordings you will keep, when older files can be removed, and which valuable sessions need another copy. A portable external drive can be one way to make a separate local copy, but it is not immune to damage, loss or failure. Select capacity based on your measured recording size and the retention period you actually need, not an assumption that a single drive covers every risk.
If you are also changing the rest of a live setup, keep the recording test distinct from stream-output troubleshooting. For example, equipment choices for a YouTube live stream can help you think through what a format needs, but a successful broadcast is not evidence that the local recording path has enough free space or is producing a usable file.
Remux an MP4 editing copy and export the profile
If you record in MKV but need an MP4 editing copy, use OBS's remuxing rather than changing the original recording setting to regular MP4 solely for convenience. Stop the recording first. In OBS, open File > Remux Recordings, select the MKV file and run the remux. OBS can also be configured to remux recordings automatically after recording stops. Check the resulting MP4 in your intended editor or player before deleting or moving the MKV.
Remuxing is not a backup step. It creates another file, and the operation can fail or the destination disk can run out of room. Keep the original until the new copy opens and you have confirmed it contains the material you need. If you need a smaller file, a different codec or a different quality level, that requires re-encoding in an editing or conversion tool; remuxing does not do that.
Once the output settings work, export the OBS profile so you can preserve most of those settings if you need to recreate the setup. OBS documents profile export as JSON in its Profiles guide. Profiles do not include scenes, so export or back up your scene collection separately. Keep both exports somewhere other than the recording disk if losing that disk would otherwise remove your configuration as well.
A reliable routine has a few deliberate checks: confirm the path and remaining space before a long session, verify the current recording is being written, and inspect a completed or remuxed file periodically. These checks will not prevent every fault, but they make it easier to notice a wrong path, unsupported output or storage problem before you depend on a file. Decide who will do the check and when, especially if the channel is managed by more than one person.
A local recording is also a different operating choice from generating a continuous broadcast from an uploaded file. If keeping a home computer switched on to write a file becomes the particular pain point, StreamNeo turns an uploaded video into a YouTube live stream without requiring your computer to remain on, while this guide's local recording advice still applies to recordings you choose to keep on your own system.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
Which OBS recording format is safest if my computer crashes?
OBS recommends MKV for most uses where an unexpected stop is a concern, and says an unfinished MKV recording remains playable and recoverable. Hybrid MP4 is another documented option in supported OBS versions, but you should confirm your codec and editor compatibility. No format guarantees that every recording will be recovered after every kind of failure.
How do I record in MKV and convert it to MP4 afterward?
Stop the recording, then choose File > Remux Recordings in OBS, select the MKV and create the MP4. You can enable automatic remuxing after recording stops as well. Remuxing does not re-encode the video, so test the MP4 in your editor and retain the original until you have checked it.
Does an MKV or Hybrid MP4 recording count as a backup?
No. Those formats address aspects of interrupted writing, not disk loss, accidental deletion or every failure that can affect a file. Keep a separate copy of recordings that matter, and check that the copy is readable.
Should I use OBS Lossless for an all-day recording?
Only if you have a specific reason for lossless output and have planned for its storage and CPU cost. OBS estimates around 7 GB per minute for its Lossless preset, which can add up quickly over a long session. Test a more appropriate quality setting with your content and hardware before relying on it.