AntzMix Studio – Help

AntzMix is a live video mixer that runs in your browser. Switch between cameras, videos, pictures and Bible verses, put logos and name titles on top, and send the result to a big screen, Zoom/Teams or a live stream.

What's new in rev61

Full details of the latest update. Older updates are summarised in the Change log.

A new home: wemix.antzsolutions.com

After this update, press Ctrl+F5 once so the browser loads the new files.

Getting started

Use Google Chrome or Microsoft Edge on a Windows or Mac computer.Some features (choosing the sound output, recording to a folder, streaming) only work in these browsers.
  1. Open AntzMix in Chrome or Edge. The start-up window shows what's new and how far loading is. When it is ready, open a template or click Start new (empty) – that click also lets the browser start sound.
  2. When you start new, AntzMix shows two starter inputs – colour bars and a blue colour – marked ADD INPUT TO START. Their only buttons are Close and Add Input. Click the gold ADD INPUT ▾ (top left, or on a starter tile) and add what you need: a camera, a logo, a video, a Quick Prompt. Added from a starter tile, the new input takes that tile's place; the other starter stays until you close it. Added from the top button, nothing is removed.
  3. Click the picture of an input – it appears in Preview (blue bar marked PREVIEW, left). Preview is what goes on air next.
  4. Press Cut or Fade – Preview moves to Program (red bar marked ● LIVE PROGRAM, right). Program is what your audience sees.
  5. Put a logo or name title on top with the 1 2 3 4 overlay buttons.
  6. Send Program out: Fullscreen output for a projector/TV, Zoom/Teams screen-share, or ● Stream to YouTube/Facebook.
Golden rulePrepare in Preview, check it, then take it to Program. Nothing you do in Preview is seen by the audience.

The screen at a glance

AntzMix main screen 1 2 3 4 5 6 7 8 9 10

PlayList button (bottom bar, left): Off hides the PlayList and STUDIO CALL / AUDIO MIXER expand downward; On brings it back. AntzMix remembers it on this computer.

Side panel (right, from top to bottom): the tabs STUDIO CALL and AUDIO MIXER above, the PlayList below. With no call, the STUDIO CALL tab shows one Start a call button; during a call it shows the guests (a green dot on the tab). Drag the thin bar above the input tiles to make the monitors bigger or smaller, the left edge of the side panel to make it wider, and the bar between the tabs and the PlayList to share the height. AntzMix remembers your layout.

Themes: Settings → GENERAL → THEME – Console Graphite (default), Console Night (almost black, for dark rooms), Console Keys (light keys), Linen (light and warm, for bright rooms) and Active (the look up to rev50). It changes at once and is remembered on this PC; your shows look the same in every theme.

Adding inputs

An input is any source you can show: a camera, a video, a picture, a title. Click the gold ADD INPUT ▾ and choose the type. Each input gets a numbered tile at the bottom.

The menu has two parts:

PartGroupInputs
StandardCamerasEvery camera and capture card on this PC, listed by name – click one to add it (the names appear after the browser was allowed to use the camera once).
PhonePhone camera (QR code).
OnlineStudio Call – call another AntzMix, or guests with a link.
Audio onlyAudio file (MP3, WAV…), Audio input device (microphone, mixer).
ContentsPlaylist, Video file, Image, Screen / Window capture.
Texts (prompts)Quick Prompt, Digital Bible (MCGI tier).
Creative inputsBasic lower third, GT Titles, Colour, FrameSets.
Advanced ⚡Local networkNDI® sources (vMix, OBS, NDI cameras…).
OnlineZoom call / meeting, RTMP / SRT stream source, Website URL (a real, interactive browser).
ContentsPowerPoint – coming soon.

Items marked soon are being built and stay grey. The menu fills each column down to about two thirds of the screen, then starts a new column, so it never hides the input tiles more than needed.

YouTubeThe old YouTube (video only) input was removed in rev35 because it did not follow YouTube's rules for apps. Public YouTube videos will work again with the coming Website URL input, which shows the normal YouTube player. For your own videos, the best quality is to download the original file in YouTube Studio and add it as a Video file.

Camera

Choose the camera and (optionally) its microphone, and the resolution. 1280×720 is lighter on the computer; 1920×1080 gives more detail. The first time, the browser asks permission to use the camera – click Allow.

Camera microphones start mutedTo stop feedback howl through the speakers, a camera's sound starts with Audio off. Turn it on when you are using headphones or when the sound goes only to the stream.

Video file

Plays one video file (MP4 works best). It never starts by itself: press ▶ on the tile or under the monitor, or use Quick Play. Turn on Loop to repeat it.

Play options of one video, playlist or website (⚙ → PLAY OPTIONS)

Settings → GENERAL decides for all inputs whether a video automatically plays, gets its sound on (Automix audio), restarts or pauses when you switch. With ⚙ → PLAY OPTIONS on a video, playlist or Website URL tile you can choose differently for that one input:

For example: the countdown video always restarts and plays when it goes to Program, but the worship playlist keeps its place. Reset all to “Same as Settings” removes the input's own choices. The ⚙ turns gold when an input has its own options, and they are saved in templates.

Playlist

Several videos, songs and pictures in one input, played in order. Select files when you add it (hold Ctrl to pick several). Edit the list in the PlayList panel. Pictures in a playlist show for the number of seconds set in Image … s.

Image / logo

JPG or PNG. A PNG with a transparent background is perfect for logos and bugs: put it on an overlay layer and it sits on top of the camera. To make it smaller, put it in a corner or make it see-through, use ⚙ → PICTURE. Very large photos are automatically reduced to save memory.

Quick Prompt and Basic lower third

Quick Prompt (called Title / Verse before rev29; a new layout comes later) fills the screen with text on a dark background – ideal for Bible verses and announcements. Basic lower third is a name strip at the bottom with a transparent background – use it as an overlay over a camera. Change the text later with the ⚙/Edit option on the tile.

Audio only: audio file and audio input device

Colour, Screen / Window

Digital Bible (MCGI tier)

The Digital Bible input shows the verses that a Digital Bible Hybrid Edition 2026 operator sends (bible.mcgi.app) – live, in the Digital Bible look. It is part of the MCGI tier; while AntzMix is in its test phase it is open to everyone. It works in the browser, no relay needed.

  1. Add Input → Texts (prompts) → Digital Bible. The Digital Bible window opens.
  2. Source: click it and choose an operator or a Live Quad position (Q1–Q4). The list shows PINNED, LIVE QUAD, STREAMING OPERATORS and ME OPERATORS; type in the search box to find any operator by name. Click ☆ to pin a source to the top (kept on this PC). Green dot = online, orange = reconnecting, grey = offline. Add stays grey until you choose a source.
  3. Version: Auto shows the verse as the operator sends it; choose a version to always show that one. If a verse is not in the chosen version, its note is shown instead.
  4. Background: Same as operator, one of the Digital Bible backgrounds, or Transparent (overlay) – only the text, to put the verse over a camera (use it as an overlay or a layer).
  5. Safe margin (bottom): keeps the bottom of the picture free, for example for a lower third. Same as operator uses the operator's choice.
  6. The big picture on the right is a live preview. Click Add.

FrameSets (a background with framed slots)

A FrameSet puts several inputs on one picture: a background with framed boxes (slots), and any of your inputs in each slot – for example the speaker big on the left and two guests on the right.

  1. Add Input → FrameSets. The FrameSet window opens.
  2. LAYOUT (left): choose how many slots and where they are. The layouts are sorted by the number of slots, from 1 to 9. The numbers show the slots.
  3. BACKGROUND: choose a preset, or Upload from this PC… to use your own picture. Your own picture is not saved in templates yet; a template opens with the preset.
  4. SLOTS: for each slot choose an input (camera, video, picture, website …) or leave it empty. The input fills its slot – what does not fit is cut off (change this per slot, see below).
  5. FRAME STYLE: Rounded corners (how round), Border (thickness and colour) and Shadow (distance and size) – each can be switched off. The style is set once for the whole FrameSet, but the frame belongs to each input: it sits around the input wherever you move it. An empty slot shows its frame where the slot is.
  6. Fine-tune a slot: click the slot in the big picture (or its number on the right). Under the picture you then set, for that slot only: Fit mode – Crop (fills the slot, the edges are cut off; called “cover” or “Fill” in other programs), Fit (the whole picture as big as fits, the background shows around it; “contain”) or Stretch (the whole picture stretched to the slot shape, it can look squeezed); Position X and Position Y (move the input with its frame left / right and up / down, in pixels of the output); Zoom XY (the input with its frame bigger or smaller, keeping its shape), Zoom X (only wider / narrower) and Zoom Y (only taller / shorter). In Fit mode the frame hugs the picture. Reset slot puts it back. The same input elsewhere is not changed.
  7. Give it a name and click Add. The big picture shows exactly what goes live; the slot numbers are never shown on air.

Studio Call (call another AntzMix, or guests with a link)

Studio Call brings people into your show live: another AntzMix operator, or a guest on a phone or laptop – no app, just a link. Picture and sound go directly between the computers (no server in between), so the delay is very short.

  1. Add Input → Online → Studio Call. Choose Single Call (one to one) or Studio Call (you host, up to 4 guests). Give the call a name, choose what you send (Program, Preview or an input) and the quality (720p or 1080p).
  2. Click Start. The link is copied – send it to your guests. The Studio Call panel opens at the bottom (button Studio Call in the bottom bar).
  3. A guest on a phone or laptop opens the link, types a name and taps Join. They see your picture, and a gold ON AIR when you use their camera. Another AntzMix joins with Add Input → Studio Call → JOIN A CALL (paste the link) and chooses what it sends you.
  4. In a Studio Call each guest waits in your list with a small picture. Click Add as input to make them an input, ready for mixing (FrameSets, layers, Cut, Merge…). In a Single Call the other side becomes an input by itself.

Phone camera (iPhone or Android, no app)

Any phone becomes a wireless camera with microphone. Nothing to install, and AntzMix Relay is not needed.

  1. On the PC: Add Input → Phone camera. A QR code and a 6-letter code appear.
  2. On the phone: scan the QR code with the camera app (or open wemix.antzsolutions.com/cam and type the code).
  3. Press Start camera and allow the camera and microphone. Hold the phone sideways for a 16:9 picture.
  4. The phone connects within a few seconds and the input shows its picture. The window on the PC closes by itself.

NDI® source (vMix, NDI cameras, NDI Webcam, OBS)

Brings any NDI source on your network into AntzMix as an input: a vMix output or final mix, an NDI PTZ camera, a phone running an NDI camera app, NDI Webcam / Screen Capture from NDI Tools, OBS with DistroAV, or another AntzMix PC. Needs AntzMix Relay 1.8 with the NDI Runtime (if something is missing, clicking Add Input → NDI® sources shows what to do).

  1. Add Input → NDI source. AntzMix searches the network and lists every source by name, with the PC it comes from.
  2. Pick one, give it a name, choose the quality and press Add.

GT Titles (vMix .gtzip)

AntzMix opens title templates made for vMix (.gtzip files from GT Title Designer, or bought template packs) and plays their animations. Add Input → vMix GT title (.gtzip) and choose the file.

Zoom call / meeting (participants in, AntzMix out)

AntzMix joins a Zoom meeting like an extra participant called AntzMix Studio. It brings each person in as a clean picture + sound you can mix, and it sends your Program (or Preview, or any input) into the meeting as its camera, with your sound as its microphone. It uses Zoom's official Meeting SDK, the same method as vMix and ZoomISO. Needs AntzMix Relay 1.10 with the AntzMix Zoom add-on on Windows: run Setup AntzMix Service Relay and tick Zoom call add-on (a one-time download of about 150 MB). If something is missing, clicking Add Input → Zoom call shows what to do.

  1. Add Input → Zoom call. Enter the meeting ID and passcode, and the name AntzMix should have in the meeting.
  2. AntzMix must be host or co-host to receive pictures. Either the host clicks Participants → AntzMix Studio → More → Make co-host, or you enter the meeting owner's host key (a 6-digit number in the Zoom profile, not the password) and AntzMix becomes host by itself – useful when the owner is not there.
  3. Press Join. The Zoom call input shows whoever is speaking, with the whole meeting's sound.
  4. Press ⚙ on the Zoom call tile → ZOOM MANAGER. Next to each person: Add as input gives them their own input, like a camera.

Zoom is a trademark of Zoom Communications, Inc. AntzMix is not made or endorsed by Zoom.

Website URL (a real, interactive browser)

Show any web page as an input: a scoreboard, a live ticker, a countdown, a lyrics page, a web dashboard or a YouTube video. A small browser inside AntzMix Service Relay – the Website add-on – opens the page and sends its picture and sound to AntzMix. Needs AntzMix Service Relay 1.16 with the Website add-on on Windows. If something is missing, Add Input → Website URL shows what to do: Install the Website add-on opens Setup with Website add-on ticked; click Install. It downloads the add-on once (about 180 MB). The relay stops for about a minute while it installs, so do this before the service. From relay 1.17, if our server would take more than 5 minutes from your location, Setup switches to a faster download server (Cloudflare) by itself – this also helps the Zoom call add-on.

  1. Add Input → Website URL. Type the address, for example youtube.com/watch?v=… (https:// is added by itself). Only web pages (http / https) can be opened, not files on the PC.
  2. Choose the Page size (Same as output, or Custom…) and the Frames per second: 24 is the default; 30 or 60 make video and scrolling smoother but use more CPU.
  3. Click Add. The tile shows opening page… until the page arrives.

RTMP / SRT stream source

Bring a live stream into AntzMix as an input – another studio, a remote speaker, a phone, an IP camera. Needs AntzMix Relay 1.7 running (if it is not, clicking the menu item shows what to do).

The tile header shows connecting…, waiting for sender or no signal – retrying until pictures arrive. Delay is about 1–3 seconds; AntzMix keeps it close to live. H.264 sources are passed through without re-encoding; other codecs (e.g. HEVC) are converted, which uses more CPU. Sound goes through the Audio Mixer like any other input.

Templates (save & open)

A template is one small file (ending in .antzmix) that remembers your whole board, so you can set up a service once and bring it back next time in seconds. Use the 📂 Template ▾ button next to ADD INPUT. The template's name is shown next to it; an orange dot means there are changes that are not saved yet.

Menu itemWhat it does
New (empty)Removes all inputs and starts again with the colour bars.
Open template… Ctrl+OOpens a .antzmix file. It replaces the current inputs (AntzMix asks first if they are not saved).
Save Ctrl+SSaves into the same file again. The first time, you choose the name and folder.
Save as… Ctrl+Shift+SSaves a copy under a new name.
Save with media…One big file that also contains all videos, pictures and GT titles – to move a show to another PC or send it to someone. Up to 3.9 GB of files.
RecentThe last 6 templates you opened or saved, one click to open again (Chrome / Edge).

What a template remembers

Video, picture and audio files

A browser cannot keep the full path of a file you picked, so a template stores each file's name and size. When you open it, AntzMix asks once for the folder with your media and looks in it and its sub-folders. If Chrome asks, choose Allow on every visit: next time AntzMix finds the files in that folder by itself.

A file that is not found becomes a red tile in its place, with Locate… (pick that file) and Folder… (search another folder for all missing files). The rest of the template works normally, and the file keeps its number, overlay and layer when you find it.

Some inputs always need one click after opening, because the browser or Zoom asks again: Screen / Window capture (Choose screen…) and Zoom call (Join… – the meeting ID is filled in, the passcode is not saved).

Restore the last state

Tick Restore the last state when AntzMix opens (in the Template menu or Settings → GENERAL) and AntzMix brings the board back after a reload or a browser crash – when you close the start-up window without a choice (Esc or a click outside it). It is kept in this browser only, not in a file, and it is off by default.

The start-up window

When AntzMix opens, a window covers the screen until everything is loaded, so nothing is clicked before it can work. It shows the logo, what's new in this version and a status bar along the bottom with each loading step:

  1. the page and its look,
  2. the program (with a percentage – on a slow internet line this step takes longest),
  3. starting the program,
  4. cameras and microphones,
  5. AntzMix Service Relay (Windows; AntzMix waits at most 3 seconds – a relay that is not running does not stop AntzMix),
  6. your recent templates.

When the bar turns green, the same window becomes Open a template:

ChoiceWhat happens
OPEN (gold box)Opens the last open template – its name, when it was last used and how many inputs it has are shown in the box. Grey when there is none yet.
Recent templatesOne click opens that template (Chrome / Edge).
Open a file… Ctrl+OPick any .antzmix file.
Start new (empty)The two starter inputs, as always.
Esc or a click outside the windowNo choice: AntzMix opens as it did before this window – with the last state if Restore the last state is ticked, otherwise with the starter inputs.

If the program cannot be loaded (for example the internet connection dropped), the bar turns red and shows Reload.

Input tiles & buttons

Click a tile's picture to send it to Preview; double-click to cut it straight to Program. The header turns blue when the input is in Preview and red when it is on Program.

ButtonWhat it does
CloseRemoves the input.
Quick PlayStarts playing and cuts to Program in one press.
CutCuts to Program. By default it keeps the play state (playing stays playing, paused stays paused) – change this in Settings → GENERAL.
LoopRepeat the video / playlist (green = on). Works wherever the input is.
▶ / ❚❚Play / pause.
1 2 3 4Put this input on overlay layer 1–4 (blue = on). Press again to take it off.
AudioThis input's sound on/off (green = on). Greyed out when the input has no sound.
🖥 (monitor icon)Show this input in a bigger window of its own.
⚙Input Configuration: picture (opacity, size, position, crop, rotate, flip) and the input's own settings – text, colour, website, play options, QR code (phone), Zoom Manager. A gold ⚙ means the input has its own picture settings or play options. Greyed out for audio-only devices (no picture, no settings yet).

Input Configuration (⚙)

⚙ on any tile opens Input Configuration: one window with every setting of that input. The tabs on the left show what this input has:

The small picture in the window shows the result (the squares = see-through). Nothing changes in Preview or Live until you click Save; Cancel or Esc leaves everything as it was. A gold line tells you when the input is on air. The ⚙ turns gold when the input has its own picture settings or play options. Everything is saved in templates.

Performance: opacity, size, position and crop cost almost nothing. Rotating and flipping live video use some extra computer power on PCs without graphics acceleration. Inputs left at normal cost nothing extra.

Preview, Program & transitions

Under each monitor, video inputs show position / duration / time remaining, a seek bar, Restart and play/pause. For a playlist there are also ⏮ ⏭ for the previous / next item.

T-bar (mix by hand)

The T-bar stands in the middle column, next to the transition buttons. It mixes the Preview input into Live by hand, at your own speed. It takes the colours of the chosen theme.

Performance: the T-bar draws only when it moves; the meter updates about 12 times a second. No extra load on the computer worth noting.

Layers (picture-in-picture)

Press ▣ on an input tile to put up to 4 other inputs on top of it as boxes – a camera in the corner of a slide, two cameras side by side, a logo box. Pick the input, a position (box top-right / top-left / bottom-right / bottom-left, left or right half, centre box, full screen) or type Left · Top · Width · Height in %. The input then always shows with its boxes – in the tiles, Preview, Program, NDI and the camera output. Layers are not saved yet when you reload the page.

What happens to sound and playback when an input goes on or off air is set in Settings → GENERAL (auto audio, auto play, restart, pause).

The monitors always keep the output shape (16:9 or 4:3, see Settings). Sources with a different shape get black bars.

Overlays (logo, lower thirds)

Overlays sit on top of Program, whatever is underneath. There are four layers; layer 4 is on top.

  1. Add a transparent PNG logo or a Lower third.
  2. On its tile press 1 (or 2, 3, 4) – it fades in on Program. The tile shows OVL 1.
  3. Press the same button again – it fades out.

The 1 2 3 4 buttons in the middle column switch a whole layer on/off, using the input last assigned to it.

The PlayList panel

Choose which playlist to edit in the drop-down (all Playlist inputs are listed).

ActionHow
Play an item nowDouble-click it.
Previous / next item⏮ ⏭ next to the drop-down (or under the monitor). Skips unticked items; wraps around when Loop is on. A playing playlist keeps playing.
Include / skip an itemClick its tick box. Ticked = plays; empty = skipped by Auto Next and Loop (shown struck through).
See what is playingThe current item's row is green (bright while playing).
SelectClick = one item · Ctrl+click = add/remove · Shift+click = range · Ctrl+A = all (mouse over the list).
Re-orderDrag an item (or all selected items) to a new place – an orange line shows where it lands. Or use ▲ ▼.
Add filesAdd, or drag files from Windows Explorer into the list.
RemoveSelect, then Remove or the Delete key.
Auto NextWhen an item ends, play the next ticked item (green = on).
LoopAfter the last item, start again from the first.
ShuffleMix up the order.
No gapsAntzMix loads the next item while the current one plays, so the switch is seamless.

Audio

Getting the picture out

Projector or TV

Click Fullscreen output. A clean window with only Program opens; double-click it to go full screen (on a second screen when the browser allows). Keep it open while you work.

Screen outputs (second screen, projector, TV)

Click Screen outputs ▾ in the top bar. The button is grey until a second screen is connected. The first time, Chrome asks once to allow window management – allow it, so AntzMix can place a window on another screen.

AntzMix Camera – Google Meet, Zoom, Teams, OBS

AntzMix Camera makes the Program output appear as a normal webcam called "AntzMix Camera" – next to your real camera, OBS Virtual Camera or vMix Video in the meeting app's camera list. Overlays, transitions and FTB are all in the picture.

  1. One time per PC: run Setup AntzMix Service Relay with AntzMix Camera ticked. Windows asks for administrator approval once – click Yes.
  2. Close and reopen Chrome / Zoom / Teams once, so they notice the new camera.
  3. Start AntzMix Relay, then press ● Cam in the AntzMix footer (or Settings → VIRTUAL CAMERA → Turn on). It turns blue.
  4. In Meet: Settings → Video → Camera → AntzMix Camera (Zoom/Teams: the camera menu next to the video button).

The Status shows in use by an app when a meeting app is showing the camera. Camera size 720p is recommended – Meet and Teams send at most 720p anyway, and it is lighter on the PC. AntzMix remembers that the camera was on and turns it back on after a reload.

SoundA webcam carries picture only. For the AntzMix sound in the meeting, set Settings → AUDIO → Main audio output to a virtual audio cable (e.g. VB-CABLE) and pick that cable as the microphone in the meeting app. Use headphones to avoid echo.

Works with 64-bit apps on Windows 10/11 (Chrome, Edge, Zoom, OBS, most webcam apps). Some Microsoft Store apps (the Windows Camera app, possibly the new Teams) only list Windows 11 "Media Foundation" cameras – support for those is planned. AntzMix Camera is based on the open-source softcam library (MIT licence, © tshino).

Zoom / Teams by screen share

Live streaming (YouTube, Facebook, RTMP)

  1. One time per PC: install AntzMix Relay.
  2. Start AntzMix Service Relay (desktop shortcut, or Start AntzMix Relay in AntzMix) – its icon appears next to the clock.
  3. In AntzMix: Settings → STREAMING (RTMP). Choose the service, paste the stream key (from YouTube Studio → Go Live → Stream, or Facebook Live Producer), pick a bitrate.
  4. Audio bitrate: 160 kbps is right for speech and worship music; choose 192 kbps for music-heavy services.
  5. Several platforms at once (optional): under Also stream to, tick up to two more destinations (YouTube, Facebook or Custom RTMP) and enter their server and key. AntzMix encodes once and the relay sends the same stream to all; if one fails, the others keep going. Your upload must carry the bitrate × the number of destinations (e.g. 3 × 4.5 Mbps ≈ 14 Mbps).
  6. Press Test relay – it should say Relay OK (version 1.4 or newer; it also tells you if NDI is ready).
  7. Press ● Stream in the footer. It turns red with time, bitrate and fps while live. Press it again to stop.
Your upload speedChoose
Under 4 Mbps2.5 Mbps, 720p
6 Mbps or more4.5 Mbps, 720p (recommended)
10 Mbps or more6 Mbps, 1080p (set 1080p in VIDEO OUTPUT)
Keep the stream key secretAnyone with it can broadcast on your channel. Only tick "Remember the stream key" on a computer you trust.

Checking quality: tick Local copy in Settings → STREAMING and the relay also saves exactly what is sent to YouTube as a file in %LOCALAPPDATA%\AntzHive\AntzMix\recordings. Play it back to judge the stream without YouTube or phone recording in between. Delete old copies from time to time – they take space.

The relay is needed because a web page cannot send RTMP by itself; the relay uses the free FFmpeg program on your PC to do it. In Chrome and Edge the video is already compressed in H.264, so the relay uses very little CPU.

NDI® output (vMix, OBS, NDI Monitor)

NDI sends AntzMix over your local network as sources that vMix, OBS (with DistroAV), NDI Studio Monitor and other NDI programs can pick up – no capture card needed.

  1. Install (or re-install) AntzMix Relay 1.4 and answer Y to Install the NDI Runtime.
  2. Start AntzMix Relay.
  3. Settings → NDI® OUTPUT: choose the sources, then tick Enable NDI output.
  4. In vMix: Add Input → NDI → YOUR-PC (AntzMix Program). The status shows how many receivers are connected to each source.

How do I know it is working?

AntzMix remembers that NDI was on and switches it back on when you reload the page (Program and Preview; Input A/B must be chosen again because inputs are not saved yet).

SourceWhat it sends
AntzMix ProgramThe final output at the output resolution and frame rate, with the final mix sound.
AntzMix PreviewThe Preview monitor (no sound).
AntzMix Input A / BAny two inputs, each on its own (no sound) – e.g. a clean camera feed.

Preview and inputs use a lighter size and rate (default 640×360 at 15 fps) to keep the CPU low; change it under Preview / inputs size and rate.

CPU and networkEach source costs some CPU. Program at 720p30 moves about 40 MB/s between the page and the relay (inside the PC), and NDI on the network uses up to about 100 Mbit/s per receiver at 720p – use wired gigabit Ethernet. Enable only the sources you use.

NDI® is a registered trademark of Vizrt NDI AB. ndi.video

Google Meet, Zoom, Teams only list cameras, not NDI sources – use AntzMix Camera for them. (NDI Tools' NDI Webcam Input also works, but AntzMix Camera needs no extra program.)

Snapshot (a photo of Live or Preview)

📷 Snapshot in the bottom bar saves a full-size PNG picture (for example 1280×720), named like AntzMix-2026-11-03_08-15-42.png. ▾ next to it opens the options:

Recording

Press ● Rec in the footer to record Program with the recording mix (the inputs with R on) to a file. It shows the time and size while recording; press it again to stop. Recording does not need the relay, and it can run at the same time as streaming and NDI.

MKV / WebM filesPlay them with VLC, or convert with HandBrake. Some players show no total length for them – that is normal for files recorded in a browser.

Installing AntzMix Relay (Windows)

From relay 1.11 the program is called AntzMix Service Relay. It installs in a normal window and then runs in the background with an icon next to the clock – no black window to keep open (or to close by mistake).

  1. Settings → STREAMING (or NDI, or GENERAL) → gold button Download AntzMix Relay for Windows.
  2. Recommended – tell Windows you trust the file: in your Downloads folder, right-click AntzMix-Relay-Windows.zip → Properties → at the bottom (Security: This file came from another computer…) tick Unblock → OK. Do this before Extract All: then the files inside are not marked as “from the internet” either, and Windows does not stop Setup with “Windows protected your PC”. It is your own choice to trust this one file; it changes nothing else on the PC.
  3. Right-click the zip → Extract All. Open the folder.
  4. Security warnings are expected for now (if you did not unblock the zip): Chrome may say the file "isn't commonly downloaded" or "may be dangerous" – open the download list and choose Keep. Windows may say "Windows protected your PC" – click More info → Run anyway. Reasons: AntzMix Relay is not code-signed yet (no paid publisher certificate, so "Unknown publisher"), it is new and rarely downloaded (no SmartScreen reputation yet), and it makes the relay start with Windows and registers a webcam component – things antivirus programs watch closely. From relay 1.18 Setup does all of this itself, in its own window, without PowerShell scripts.
  5. Double-click Setup AntzMix Service Relay. If Windows says "Windows protected your PC", click More info → Run anyway (why?).
  6. Tick what you need: AntzMix Camera (for Meet/Zoom/Teams – Windows asks for administrator approval once), NDI Runtime (only for NDI), Zoom call add-on (only for Zoom calls, about 150 MB), Website add-on (only for Website URL, about 180 MB), Start with Windows. Click Install.
  7. The window shows each step (Node.js and FFmpeg are installed only if missing), live progress for downloads (MB, speed, time left) and the details. The Zoom add-on (about 150 MB) is the last step: after you click Install/Update, Setup checks whether a newer one is on the site and downloads it only then. At the end it says AntzMix Service Relay is installed and the icon appears next to the clock (click ˄ there if it is hidden).

It is installed in %LOCALAPPDATA%\AntzHive\AntzMix\relay, with an AntzMix Service Relay shortcut on the Desktop and in Start → AntzHive. When you update from the older WebMix Service Relay, Setup moves its settings, the Zoom add-on and your recordings from AntzHive\WebMix to AntzHive\AntzMix (no new Zoom download) and removes the old WebMix shortcuts, program entry and start-up entry.

To update: right-click the icon → Check for updates, or run the new Setup – it closes the running relay first. To remove it: Windows Settings → Apps → AntzMix Service Relay → Uninstall (or Start → AntzHive → Uninstall AntzMix Service Relay).

Why does Windows show a warning?

When you open Setup AntzMix Service Relay, Windows may show a blue window: “Windows protected your PC – Microsoft Defender SmartScreen prevented an unrecognised app from starting.” Chrome may also say the download “isn't commonly downloaded”.

The relay icon next to the clock

IconMeaning
● green dotRunning.
● amber dotStarting or restarting.
● red dotStopped – right-click → Start relay.

Right-click (or click) the icon for: Open AntzMix Studio, Restart relay, Stop / Start relay, Check for updates (downloads the new version and opens its Setup), Open log (the relay's messages, which used to be in the black window), Open relay folder, Start with Windows, About and Exit.

Starting & updating the relay

AntzMix always shows the relay's state in the footer, left of ● Stream:

Footer showsMeaning / what to do
⬇ Get AntzMix RelayNot set up on this PC yet – click it and follow the box in Settings → GENERAL.
▶ Start AntzMix Relay ▾Installed but not running – click to start it. The first time, Chrome asks "Open AntzMix Service Relay?": tick Always allow and click Open. The icon appears next to the clock.
● RelayRunning – Stream, Cam, NDI and the PC CPU figures are available.
● Relay · updateA newer relay is available – Settings → GENERAL → Update to AntzMix Relay …, run the installer.

Settings

Click Settings (or the format badge, e.g. 720p30 · 16:9). The sections are listed on the left: GENERAL, OUTPUTS (Video output, Virtual camera, NDI, Streaming, Recording) and SYSTEM (Audio, Performance). A small dot next to Virtual camera, NDI, Streaming or Recording shows it is running. AntzMix remembers your choices on this computer.

The AntzMix Relay box (on GENERAL, VIRTUAL CAMERA, NDI and STREAMING) checks the relay every time you open those pages: green = running, red = not running. Its gold Download AntzMix Relay for Windows button gets the installer; Check again re-tests after you start the relay.

GENERAL – what happens on a transition

These apply to Cut, Fade and Quick Play (not to overlays). All are off by default, so inputs keep their current state.

Tick boxWhen tickedWhen not ticked
Automix audioAn input's Audio turns on when it goes to Program and off when it leaves (unless it is still showing on an overlay layer).Audio stays as it is.
Automatically play with transitionA paused video/playlist starts playing from where it is when it goes to Program.Stays paused if paused.
Automatically restart with transitionThe video/playlist item goes back to the start when it goes to Program.Keeps its position.
Automatically pause after transitionThe input pauses when it leaves Program (goes back to Preview).Keeps playing if it was playing.
Show PC CPU usageThe status line shows CPU of the whole PC split into browser / relay / other (needs AntzMix Relay 1.4 running).Only AntzMix's own share is shown.
Show PREVIEW / LIVE PROGRAM textThe words PREVIEW and ● LIVE PROGRAM show on the right of the blue Preview bar and the red Program bar (on by default).Only the input names are shown on the bars.

T-bar (two choices, see T-bar): Auto return Yes / No and Transition while half mix Auto Complete / Stay.

vMix-like setupTick all four for "what's on air plays and is heard; what's off air is paused and silent". Restart + play is handy for intros and bumpers.
SectionSettingNotes
VIDEO OUTPUTOutput ratio16:9 (widescreen, default) or 4:3.
Output resolution720p (default, lighter) or 1080p.
Frame rate25, 30 (default), 50 or 60 frames per second.
VIRTUAL CAMERAOn/off, camera sizeSee AntzMix Camera.
NDI® OUTPUTEnable, sources, size and rateSee NDI output.
STREAMING (RTMP)Service, server, key, bitrate, encoding, relaySee Live streaming.
RECORDINGFolder, file type, video/audio qualitySee Recording.
AUDIOMain audio outputWhere the final mix plays.
PERFORMANCEPerformance modeEco for older laptops, Balanced (default), Quality for strong PCs.
Stability testSee Performance.

Keyboard shortcuts

Settings → SHORTCUTS lists the actions that have a key, with a search box (find an action or a key). + Add shortcut opens a list of every action in AntzMix, in groups, with its own search box: click an action, then press the key or key combination. Change gives an action another key, ✕ removes it, Reset all to defaults brings back the keys AntzMix starts with.

Performance & stability test

The status line (bottom right) shows the output format, FPS (frames drawn per second), render time, late frames, AntzMix RAM (memory used by AntzMix's own code – video frames and the browser use more; Task Manager shows the browser's total) and CPU. "idle" means nothing is changing on Program – AntzMix then saves power by not redrawing.

CPU figureMeaning
AntzMix ≈ x%The mixer itself (this page's drawing work), as a share of the whole PC. Always shown.
CPU x%The whole PC, like Task Manager. Needs Show PC CPU usage (Settings → GENERAL) and AntzMix Relay 1.4.
browserAll Chrome/Edge processes – all tabs, video decoding and the GPU process. Close other tabs to lower it.
relayAntzMix Relay and FFmpeg (streaming, NDI).
otherEverything else on the PC (antivirus, Zoom, updates…). If this is high, close those programs before the event.

Before an important event, test your computer:

  1. Set up your real show: camera on Program, logo and lower third on, playlist playing.
  2. Settings → PERFORMANCE → Stability test, choose 5 or 15 minutes, Run test.
  3. Result PASS = ready. NEEDS ATTENTION = try 720p, Eco mode, fewer inputs, or close other programs. Copy report to share it with your technical contact.
Tips for smooth showsPlug in the laptop charger, close other tabs and programs, keep the AntzMix tab visible (don't minimise it), and use 720p unless you need 1080p.

Troubleshooting

No sound
  • Click once anywhere on AntzMix (browsers block sound until you click).
  • Check the input's Audio is green and its fader and Master are up.
  • Settings → AUDIO → check the Main audio output is the device you are listening to.
  • Camera microphones start with Audio off – turn it on.
Camera is black or not listed
  • Allow camera access (padlock icon left of the address bar → Camera → Allow).
  • Close other programs that use the camera (Zoom, Teams, the Camera app).
  • Unplug and re-plug a USB camera, then add it again.
A video won't play ("format not supported")

Use MP4 (H.264 video, AAC audio). Convert other formats with a free tool such as HandBrake.

"Relay not reachable" when testing or streaming
  • Start AntzMix Service Relay from the desktop (icon next to the clock), or use ▾ → Restart AntzMix Relay in AntzMix.
  • If Chrome asks to allow the site to connect to devices on your local network, click Allow.
  • Not installed yet? See Installing AntzMix Relay.
Stream starts then ends straight away
  • Check the stream key (copy it again from YouTube Studio / Facebook).
  • On YouTube, the live stream must be set up in Studio first (Go Live → Stream).
  • Look at the relay log (right-click the relay icon → Open log) – it shows the reason from FFmpeg.
Stream sound is crackly or "not clear", but fine on the PC
  • Make sure the relay is version 1.3 or newer (Test relay shows the version). Older relays could let tiny gaps in the sound through, heard as crackles. Re-run the installer to update.
  • Use audio bitrate 160 or 192 kbps.
  • Judge quality from the Local copy or YouTube's own recording, not a phone recording or WhatsApp video – those compress the sound again.
  • Hiss in the source (mixer desk, cable, input gain) gets worse after compression – keep the source clean and the level healthy.
Stream is choppy or "falling behind"

Choose a lower bitrate (2.5 Mbps), use 720p, use a wired network instead of Wi-Fi, and run the Stability test.

Picture stutters / CPU shows "serious" or "critical"

Switch to Eco mode or 720p, close other programs and browser tabs, plug in the charger.

The page still shows an old version after an update

Press Ctrl+F5. The version is shown next to the AntzMix name and in the browser tab.

AntzMix is not in the Google Meet / Zoom camera list
  • Meetings list cameras, not NDI sources – use AntzMix Camera.
  • Settings → VIRTUAL CAMERA: the relay box must say Camera ready. "AntzMix Camera NOT installed" = run Setup AntzMix Service Relay again with AntzMix Camera ticked (approve the administrator prompt).
  • Close and reopen the browser / meeting app once after installing.
  • The camera shows black or "not available" when ● Cam is off or the relay is closed – turn it on, then reselect the camera.
NDI: "NDI not available" or the source doesn't appear in vMix/OBS
  • Run Setup AntzMix Service Relay again and tick NDI Runtime.
  • Test relay should say NDI ready.
  • Both PCs must be on the same network; allow the relay (Node.js) through Windows Firewall on Private networks when Windows asks.
  • "dropped" in the NDI status means the PC can't keep up – turn off sources you don't need or use 720p.
Recording: "no folder chosen" or nothing saved
  • Pick a normal folder such as Videos or Documents (Windows system folders and Desktop root may be refused by the browser).
  • If the browser asks again for permission to the folder, click Allow (Chrome asks once per visit).
  • Browsers without folder access (e.g. Firefox) download the file when you stop.

FAQ

Do I need to install anything?

No for mixing, recording, the big screen and Zoom/Teams screen-share – AntzMix runs in the browser. Live streaming, AntzMix Camera, NDI output and the PC CPU figures need the small AntzMix Relay (free, installed once); AntzMix Camera needs one administrator approval; NDI also needs the free NDI Runtime.

Are my files uploaded to the internet?

No. Videos and pictures you add stay on your computer; AntzMix plays them directly from your disk.

Does AntzMix remember my show when I reload the page?

Settings and layout are remembered. Inputs are not saved yet – a save/load show feature is planned.

Does AntzMix collect any data about me?

Only anonymous usage statistics, so the team knows how many people use AntzMix and which features work for them: once a minute, a random id made by your browser, the AntzMix version, the browser name (e.g. "Chrome 141 / Windows") and whether Stream, Cam, NDI or Rec is on. No names, IP addresses, files, pictures, sound or stream keys. Switch it off in Settings → GENERAL → Send anonymous usage statistics.

Can I use it on a phone or tablet?

A phone works great as a wireless camera for AntzMix. The mixer itself is designed for a laptop or desktop with Chrome or Edge.

Glossary

PreviewThe next shot, only you see it (blue).
ProgramWhat goes out to the audience (red, LIVE PROGRAM).
InputAny source: camera, video, picture, title.
OverlayA layer shown on top of Program (logo, lower third).
Lower thirdA name/title strip across the bottom of the picture.
FTBFade To Black.
RTMPThe standard way of sending a live stream to YouTube, Facebook etc.
Stream keyThe secret code that links your stream to your channel.
BitrateHow much data per second the stream uses – higher = better picture, needs faster internet.
RelayThe small AntzMix helper program on your PC that sends the live stream and NDI.
NDI®A standard for sending live video between programs and PCs over a local network (by Vizrt).
Virtual cameraA "camera" made by software. AntzMix Camera shows the Program output to meeting apps as if it were a webcam.
AutomixSound follows the picture: on when on air, off when off air.

Change log

A short summary of every AntzMix Studio update, newest first. The full details of the latest update are in What's new. The version (for example rev35) is shown next to the logo in the app. “Relay” is the AntzMix Service Relay version that came with it.