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OBS Virtual Camera vs a Dedicated Virtual Camera App
OBS Studio already outputs a virtual camera, so is a separate app worth installing? What each is built for, and when OBS is the right answer.
We make CamLooper, one of the tools this article recommends. Why we write these guides.
Disclosure: we make CamLooper, the dedicated app on one side of this comparison. We have tried to be even-handed, and the article names four situations where OBS is the better choice — but weigh it knowing where it comes from.
If you have already installed OBS Studio, you have a virtual camera — there is a Start Virtual Camera button in the main window, and whatever your scene is composing appears in Zoom as OBS Virtual Camera. So the reasonable question is whether a dedicated app adds anything.
The short version: OBS is a broadcasting suite whose virtual camera is one output among many. A dedicated virtual camera app has one job. Which is better depends entirely on whether you want the rest of the suite.
Side by side
| OBS Studio | Dedicated app | |
|---|---|---|
| Setup to first frame | Create a scene, add a Media Source, point it at the file, set loop, start the camera | Open file, start camera |
| Overlays, multiple sources, transitions | Yes, this is the point of it | No |
| Recording and streaming to Twitch/YouTube | Yes | No |
| Memory and CPU at idle | Substantial — a full compositor and render pipeline | Small |
| Looping a single file cleanly | Works, but through the general media pipeline | The main thing it is engineered for |
| Linux | You install v4l2loopback yourself | CamLooper's .deb/.rpm set it up during install |
| Learning curve | Scenes, sources, filters, profiles | Effectively none |
Where OBS is genuinely the better choice
Use OBS, and do not bother with anything else, if any of these describe you:
- You want to composite. Your real camera in a corner over a slide deck, a lower third with your name, a chat overlay. Nothing single-purpose will do this.
- You want to switch sources mid-call. Scene hotkeys let you cut from a video to your live camera to a screen region without touching the conferencing app.
- You are already streaming. If OBS is open anyway, adding a Media Source costs you nothing.
- You need filters. Chroma key, colour correction, cropping, LUTs.
Where a dedicated app wins
It starts in seconds, every time
The OBS path is: launch, wait for it to load, pick the right scene collection, confirm the Media Source still points at the file you want, check the loop box is still ticked, press Start Virtual Camera. If you do this once a week you will re-learn it every time. A dedicated app is two actions, and the second one is a button.
The loop is the product, not a checkbox
OBS's Media Source has a Loop option and it does loop. But OBS is built around a compositor running at a scene frame rate, pulling from sources; the seam at a loop boundary is whatever that general pipeline produces. An app built specifically to play a file as a camera can decode the next pass ahead of the current one finishing, so the join costs exactly one frame interval. That difference is the whole reason a looped recording either reads as a live feed or reads as a clip that restarts — it is what CamLooper is designed around.
It is not competing for your machine
OBS keeps a full render pipeline alive. On a laptop already running a video call, that is noticeable — fans, battery, and occasionally frames dropped from the call itself. Decoding one file and pushing frames to a device is much cheaper.
Linux setup is handled
On Linux both routes end at the same place: v4l2loopback. With OBS you install the
module, get the options right (exclusive_caps=1 if you want browsers to accept the
device), and make it persist across reboots and kernel updates —
all covered here. CamLooper's .deb and
.rpm pull the module in and load it during install, so there is nothing to configure by
hand.
Things that are the same either way
Do not expect a dedicated app to fix problems that are not the app's:
- Start the camera before the conferencing app. Zoom, Teams and Discord enumerate devices at launch. This bites OBS users and everyone else equally, and is the number one cause of a missing camera.
- The app must stay open. Both hold the device only while running.
- Mirroring. Zoom and Teams mirror your self-view regardless of the source.
- macOS signing. Camera extensions must be signed and notarized by Apple, whoever ships them.
Can you run both?
Installed side by side, yes — they register separate devices and your camera dropdown will list both. Running both cameras at once is asking for trouble on Windows, where a capture device is usually exclusive to one consumer, and it is rarely useful anyway. Start one.
There is also a hybrid worth knowing about: run the dedicated app as your looping source, and add it in OBS as a Video Capture Device. You get the seamless loop plus OBS's overlays, and OBS's virtual camera is what your conferencing app sees.
The decision, in one line
If your answer to “what do you want on the call?” is a composition, use OBS. If it is a video file, use something built to play a video file as a camera — you will spend less time setting it up and get a better loop out of it.