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Animated stream overlays
that loop forever.

The animated stream overlay generator with mathematically seamless loops. Export transparent WebM and MOV overlays for OBS Studio, Streamlabs, Twitch, YouTube, and Kick — no stutter at the loop point, no After Effects, no exporting at 3am before going live.

  • OBS · Streamlabs · Kick
  • Transparent WebM & MOV
  • 4K · 60fps · alpha
Drops into
  • OBS Studio
  • Streamlabs
  • Twitch Studio
  • YouTube Studio
  • Kick
  • Restream
  • vMix
Why StreamOverlay

Built for streamers who notice the seam.

Every overlay is rendered with frame-accurate loop matching, so the last frame meets the first like nothing happened. Your viewers never see the cut.

Frame-accurate loops

We render at integer-second durations and snap motion curves to loop boundaries. No stutter, no jump.

Pixel-perfect

True 1080p, 1440p and 4K. Crisp text, clean edges, real transparency — not a screen-record of your monitor.

Drop into OBS

Export transparent WebM / MOV / PNG sequences. Add as a Media Source. Done. No plugins.

30 seconds, not 3 hours

Pick a preset, tweak the colors, hit render. Skip the After Effects rabbit hole.

Match your brand

Inject your palette, fonts and channel name. Every overlay in your kit comes out cohesive.

Royalty-free

Use what you generate. Forever. Across every channel and platform you stream to.

How it works

Three steps. Live before your stream key cools down.

  1. 01

    Pick a preset

    Webcam frames, lower thirds, BRB screens, follower toasts, transitions, ambient backgrounds — start from a template that already loops.

  2. 02

    Make it yours

    Drop in your colors, your handle, your accent font. A live preview re-renders as you type — including the loop.

  3. 03

    Export & drop in

    Transparent WebM for browser-source workflows, MOV with alpha for OBS Media Source, or a PNG sequence if you're picky. Drag, drop, go live.

Live preview

Watch the loop. Look for the seam.
You won't find one.

LIVE
Cam frame · Pulse
6.0s loop · 1080p60 · alpha
NOW PLAYINGCosmic Drift — StreamOverlay FM
Lower third · Equalizer
4.0s loop · 1080p60 · alpha
BRB
Transition · Stripes
2.0s loop · 1080p60 · alpha
“I've been hand-keying loops in After Effects for years. StreamOverlay nails the seam in seconds. I'm never opening AE for an overlay again.”
Maya Okafor
Variety streamer · 84k followers
Switching from another tool?

How StreamOverlay compares.

The short, factual breakdowns of where StreamOverlay differs from the obvious alternatives — so you can decide if it fits your workflow.

vs OWN3D

StreamOverlay vs OWN3D template marketplace

Why a generator that produces unique overlays beats picking from a 900-pack catalog — and where OWN3D still wins.

Read the OWN3D comparison vs StreamElements

StreamOverlay vs StreamElements browser source

Transparent video file in a Media Source vs full Chromium in a Browser Source. The CPU cost, the loop quality, and when each is right.

Read the StreamElements comparison vs Canva

StreamOverlay vs Canva for animated overlays

Why Canva's MP4 export can't carry an alpha channel — and what to use when you actually need a transparent looping overlay.

Read the Canva comparison

All overlay tool comparisons →

Under the hood

Transparent video formats for OBS, compared.

The two-second version: WebM (VP9 alpha) for streaming, MOV (ProRes 4444) for editing, PNG sequence when nothing else works. StreamOverlay exports all three.

Why animated overlays stutter at the loop point

Most overlay tools export a fixed-length clip and rely on the player to restart it on a loop. If the last rendered frame doesn't match the first frame at the pixel level, you get a visible pop, flicker, or jump every time the clip restarts. The seam is exactly as wide as one frame, but the human eye picks it up — especially on motion graphics with continuous rotation, drift, or pulse.

StreamOverlay constrains the animation math so the seam is mathematically continuous: phase, position, opacity, and motion blur all return to their starting state on the final frame. There is no fade-and-crossfade hack — the loop is built into the animation, not patched on at the end.

Format comparison — WebM, MOV, PNG sequence

Format Codec Alpha File size Best for
WebM VP9 with alpha (yuva420p) Yes — 8-bit Smallest Live streaming overlays in OBS, Streamlabs, Kick
MOV ProRes 4444 Yes — 12-bit Large Higher quality, re-editing in Premiere or DaVinci Resolve
PNG sequence Per-frame PNG (image sequence) Yes — 8-bit Largest Fallback when WebM or MOV won't decode cleanly

All three preserve a full alpha channel. WebM (VP9 alpha) is what we recommend for 95% of streamers — smallest file, lowest CPU, and OBS Studio decodes it natively without StreamFX or third-party plugins.

VP9 alpha (WebM) — recommended for streaming

VP9 is a royalty-free video codec with native alpha-channel support via the yuva420p pixel format. WebM files using VP9 alpha play back inside OBS Studio, Streamlabs Desktop, Twitch Studio, and Kick Studio with transparency intact — no extra plugin, no chroma key hack.

StreamOverlay encodes VP9 alpha at the bitrate you need (we default to constant-quality CRF) so the file stays small and your GPU has headroom for the actual game.

Why not just use Canva's MP4 export? Canva exports H.264 MP4, which doesn't have an alpha-plane spec — there's no setting to make the background transparent. Read the full StreamOverlay vs Canva comparison →

ProRes 4444 (MOV) — for editing and high-quality archives

Apple ProRes 4444 is the codec After Effects users export when they need to keep an alpha channel. It carries 12-bit colour and a separate alpha plane, so motion graphics composite cleanly in any non-linear editor. The trade-off is file size — a 10-second 1080p ProRes 4444 clip is typically 100–200 MB, vs ~2–5 MB for the equivalent VP9 WebM.

Use ProRes 4444 when you plan to re-edit the overlay later in Premiere Pro, Final Cut, or DaVinci Resolve — or when you're sending the asset to a video editor. For dropping directly into OBS, prefer WebM.

PNG sequence — the universal fallback

A PNG sequence is just a folder of numbered PNG frames (overlay_0001.png, overlay_0002.png, …). OBS Studio's Image Slide Show source plays them as a loop. PNG sequences are large (every frame is fully compressed PNG) but they're the most compatible format that exists — if a tool struggles with WebM or MOV alpha, it will read PNGs.

StreamOverlay exports PNG sequences at the same resolution and framerate as the video formats, so you can swap formats without changing your OBS scene.

Troubleshooting

Common OBS overlay problems, fixed.

The exact issues we built StreamOverlay to make go away — explained for the people still wrangling them by hand.

My OBS browser source shows a black background instead of being transparent.

Cause: Your overlay's HTML or CSS has a solid background colour applied to html or body. OBS renders that colour as-is — it doesn't strip white or black.

Fix: Set html, body { background: transparent !important; } in your overlay's CSS. Then right-click the Browser Source in OBS → Refresh. If you're using a third-party overlay service, check its "Custom CSS" field for an explicit background rule and remove it.

The StreamOverlay way: exports are transparent video files, not browser pages — there's no HTML/CSS layer to misconfigure. Drop the WebM in as a Media Source and transparency Just Works.

Why does my animated overlay drop frames in OBS Studio or Streamlabs?

Most common cause: the overlay file is a high-bitrate H.264 or uncompressed format that taxes the CPU on every decode. Animated PNGs (APNGs) and oversized MOV files are repeat offenders.

Fix: re-encode the overlay to VP9 alpha WebM at a sensible CRF (28–32 for streaming-grade quality). The file shrinks 30–50×, decodes on the GPU, and stops competing with the game for CPU cycles. Also: lower the overlay's framerate to 30 fps unless it genuinely needs 60.

If you're already on VP9 WebM and still dropping frames, check OBS → Stats for "missed frames due to rendering lag" vs "encoding lag" — the cause and fix are different for each.

Using a browser source for the animated overlay? Each browser source runs a full Chromium instance — typically 100–300 MB of memory and a constant CPU draw. A transparent video file in a Media Source is ~10× lighter. Why a video file beats a browser source for decorative overlays →

My WebM file isn't transparent in OBS. It's just showing a black box.

Cause: the WebM was encoded with VP8 or VP9 in yuv420p (no alpha) instead of yuva420p. Most online video converters silently strip the alpha channel.

Fix: re-export the source with VP9 + yuva420p. If you have the source as a transparent MOV (ProRes 4444), the FFmpeg command is: ffmpeg -i in.mov -c:v libvpx-vp9 -pix_fmt yuva420p -auto-alt-ref 0 out.webm — the -auto-alt-ref 0 flag is required for VP9 alpha to encode correctly.

The StreamOverlay way: WebM exports are always yuva420p. There is no "non-transparent" toggle to forget.

My MOV overlay has a black or grey edge around it in OBS.

Cause: the ProRes 4444 export uses straight alpha but OBS expects premultiplied alpha. After Effects defaults to straight alpha unless you change it.

Fix: in After Effects, set Channels → RGB + Alpha with Color → Premultiplied (Matted With Black) in the output module before render. In DaVinci Resolve, set the Render Settings → Advanced → Alpha to Premultiply.

Alternatively, use a WebM (VP9 alpha) export — the codec specification handles premultiplication consistently across players.

My animated overlay loops, but I can see a visible "pop" or flicker every few seconds.

Cause: the first and last frames of the overlay don't match at the pixel level. The clip restarts on a frame that's almost identical to frame one, and your eye catches the discontinuity.

Manual fix: open the source in your editor and constrain the animation so the final frame's transform, opacity, and motion blur match frame one exactly. Trim to a whole-second duration. If your animation uses noise or random motion, freeze the seed.

The StreamOverlay way: the seam is built in. The math is constrained from the start — phase, position, opacity, blur all return to their starting state on the final frame.

How do I reduce overlay file size for OBS without losing transparency?

Pick the smallest format that still has alpha. From most to least efficient:

  1. VP9 alpha WebM — typically 1–5 MB for a 10s 1080p overlay. The right answer 95% of the time.
  2. HEVC with alpha (HVC1) — supported by OBS on macOS Monterey+ and Windows 11 with the right hardware encoder, but compatibility is uneven. Skip unless you have a specific reason.
  3. ProRes 4444 MOV — 100–200 MB for the same clip. Only use when re-editing.
  4. PNG sequence — largest of all, but most compatible.

Resolution matters as much as codec — a 720p overlay is roughly 2.25× smaller than 1080p with no visible difference at 4K stream output, because OBS upscales the overlay layer cleanly.

What's the best framerate for an OBS overlay?

30 fps for most overlays, 60 fps only when the overlay has fast camera-style motion (whip pans, fast strobes) that benefits from doubled temporal resolution. A 30 fps overlay on a 60 fps stream looks indistinguishable from a 60 fps overlay in real-world testing — and uses half the encode and decode cost.

Match the overlay framerate to a whole-second division of your stream framerate so the loop point lands cleanly: 30 fps with a 3-second loop = 90 frames, 60 fps with the same loop = 180 frames.

FAQ

Quick answers.

Does it really work with OBS?

Yes. StreamOverlay exports the formats OBS already loves — transparent WebM (VP9 alpha), MOV (ProRes 4444), and PNG sequence. Drag in as a Media Source, set it to loop, done.

What's "seamless loop" actually mean?

The first and last frames are identical, motion velocities at the boundary match, and timing snaps to whole-second durations. Result: no stutter or pop when the clip restarts.

Do I need design skills?

No. Every preset already looks good and already loops. You only change the things you want to change — colors, handle, accent font.

What does it cost?

Free during early access. After launch, a friendly monthly plan plus a free tier with watermarked exports. Early-access list gets a launch discount and grandfathered pricing.

When is launch?

We're inviting users in waves through 2026. Drop your email below to get bumped up the list.

Be first behind the curtain.

Join 4,217 streamers already on the list. We send one email when your invite is ready — and nothing else.