{"schemaVersion":1,"record":{"key":"mechanic/phone-camera--family-multiplayer","type":"mechanic","id":"phone-camera--family-multiplayer","lang":"en","title":"Multiple cameras, participants and video calling","summary":"Cameras connect participants in a video session. Google Meet shows multiple callers; video calling alone does not synchronize an AR scene’s coordinates.","updatedAt":"2026-10-22","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/phone-camera--family-multiplayer/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/phone-camera--family-multiplayer.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/phone-camera--family-multiplayer.md","aliases":["Multiple cameras and video calling"],"tags":["Phone camera interactions","Mechanics catalog"],"sourceIds":["source-c121374ae20b1406","source-0599b2ea6361e813","source-2db44dc39ac12e33","source-5a7c6c3b0a23aa89"],"sources":[{"id":"source-c121374ae20b1406","title":"Apple AVFoundation: Camera Capture and Control","url":"https://developer.apple.com/documentation/avfoundation/capture-setup","verifiedAt":null},{"id":"source-0599b2ea6361e813","title":"ARCore: motion tracking, planes, anchors","url":"https://developers.google.com/ar/develop/fundamentals","verifiedAt":null},{"id":"source-2db44dc39ac12e33","title":"Android: multi-camera and hardware limitations","url":"https://developer.android.com/media/camera/camera2/multi-camera","verifiedAt":null},{"id":"source-5a7c6c3b0a23aa89","title":"Google Meet","url":"https://apps.apple.com/us/app/google-meet/id1096918571?uo=4","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"Camera interaction is distributed between people or filming points. Simultaneous capture by different cameras depends on the model and mode. A collaborative AR scene requires synchronization of coordinates and game state; The video stream itself does not provide it."},{"id":"variants","title":"Variants","body":"### Variants and applications\n\n\n\n- Front/rear switching. Action: Change the camera aimed at the player and at the environment as two game modes. Application: “Me and the world”, change of role, transfer of action between the sides of the phone. Technologies: Camera capture. \n- Front and rear at the same time. Action: Link the facial action with what is happening in front of the rear camera. Application: Mimic spell on an object, reaction and event, double scene. Technologies: Camera capture; Device capabilities. \n- Two rear angles. Action: Use available cameras with different fields of view simultaneously. Application: Review and sighting, part search, experimental stereo scene. Technologies: Camera capture; Device capabilities. \n- Common field for several phones. Action: Combine local maps and show one spatial game. Application: AR tabletop, joint construction, local battle. Technologies: AR spatial tracking; Network exchange. \n- Mirror duet. Action: Repeat the visible movements of another participant in real time. Application: Dance duel, synchronization, team coordination. Technologies: Recognition or machine learning model; Network exchange. \n- Remote observer. Action: One player shows the world with a camera, the other guides it via video link. Application: Cooperative detective, quest operator, remote guide. Technologies: Camera capture; Network exchange. \n- Separate information. Action: Show different participants different cameras or digital layers. Application: Asymmetric cooperative, ciphers, search with an operator. Technologies: Camera capture; Network exchange. \n- Visual relay race. Action: Pass a frame, gesture or layout to the next participant to continue. Application: Chain story, photo quest, group animation. Technologies: Camera capture; Network exchange. "},{"id":"context","title":"Context and limits","body":"Games, learning, creativity and interactive applications. Author's systematization of game rules based on proven technical capabilities. Examples are application ideas and not statements of released products."}],"relations":[],"placements":[{"catalogId":"phone-camera","id":"family-multiplayer","title":"Phone camera interactions","url":"https://gamemechanics.pro/en/mechanics/phone-camera/#family-multiplayer","categoryIds":["section-1"]}],"supersededBy":[],"attributes":{"preview":{"updatedAt":"2026-10-22","title":"Multiple cameras and video calling","description":"Cameras connect participants in a video session. Google Meet shows multiple callers; video calling alone does not synchronize an AR scene’s coordinates.","image":{"src":"images/mechanics/input-google-meet-4.webp","width":720,"height":1280,"crop":{"x":90,"y":390,"width":540,"height":890},"game":"Google Meet","sourceUrl":"https://apps.apple.com/us/app/google-meet/id1096918571?uo=4","originalUrl":"https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/d4/b4/3d/d4b43de5-ec61-76d1-1af3-0bdf6bc053df/6f6667ac-1f37-434f-80db-7cc600c7bf3b_APP_IPHONE_55-5.png/720x1560bb.jpg","credit":"Google","rights":"Imagery © Google. Developer-distributed screenshot or frame; all rights reserved. Excluded from MIT and CC BY 4.0.","caption":"Google Meet: participant video feeds in a shared call","alt":"Google Meet: participant video feeds in a shared call","markers":[{"x":50,"y":56,"label":"Tiles show separate participant video streams"}]},"tips":["Account for delay, dropped frames and consent to transmit video."],"examples":[{"title":"Google Meet","url":"https://apps.apple.com/us/app/google-meet/id1096918571?uo=4"}]}},"endsAt":null,"provenance":"Original editorial design catalog consolidated from project discussions on 2026-10-20. Complete discussion item lists and contextual limitations are preserved; linked primary sources support specific techniques, not the entire classification. English translation was prepared with machine assistance and editorial review.","license":"CC-BY-4.0","codeLicense":"MIT","attribution":"gamemechanics.pro contributors","catalogKey":"catalog/phone-camera"}}