{"id":13567737,"url":"https://github.com/MAHines/Big-Screen-II","last_synced_at":"2025-04-04T02:32:46.444Z","repository":{"id":218417134,"uuid":"274012651","full_name":"MAHines/Big-Screen-II","owner":"MAHines","description":"Use Airplay to share iOS video stream from camera","archived":false,"fork":false,"pushed_at":"2020-06-27T22:10:00.000Z","size":120,"stargazers_count":2,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2024-08-01T13:38:41.308Z","etag":null,"topics":["airplay","camera","digital-whiteboard","ios","ios-swift","lectures"],"latest_commit_sha":null,"homepage":"","language":"Swift","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/MAHines.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.txt","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2020-06-22T01:26:44.000Z","updated_at":"2023-05-27T07:47:30.000Z","dependencies_parsed_at":null,"dependency_job_id":"c8976d83-c74e-45a3-9ff4-6dc7308e2353","html_url":"https://github.com/MAHines/Big-Screen-II","commit_stats":null,"previous_names":["mahines/big-screen-ii"],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/MAHines%2FBig-Screen-II","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/MAHines%2FBig-Screen-II/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/MAHines%2FBig-Screen-II/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/MAHines%2FBig-Screen-II/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/MAHines","download_url":"https://codeload.github.com/MAHines/Big-Screen-II/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":223083179,"owners_count":17084825,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["airplay","camera","digital-whiteboard","ios","ios-swift","lectures"],"created_at":"2024-08-01T13:02:41.034Z","updated_at":"2024-11-04T22:33:06.500Z","avatar_url":"https://github.com/MAHines.png","language":"Swift","funding_links":[],"categories":["Swift"],"sub_categories":[],"readme":"# Big Screen II\n\nBig Screen II is an iOS app that transmits, and optionally records, live\nvideo from the camera to a second screen connected by AirPlay. The\ncontrols are not mirrored to the second screen.\n\n\n-   Front or back camera\n-   Landscape or portrait orientation\n-   Records video and audio\n-   Supports camera zooming\n-   Tap to focus; Double tap to autofocus\n-   Adjust exposure by sliding after focus\n-   Triple tap suppresses Airplay warning\n-   Can use as a document or demo camera\n-   Videoconference lectures and office hours from home\n-   Video recording: 1280 x 720 px with HEVC (if supported) or H.264\n    compression\n-   Available on the [App\n    Store](https://apps.apple.com/us/app/big-screen-ii/id1498789417?ls=1)\n\n\nBig Screen II is part of a digital whiteboard developed in the Hines Lab\nin the Dept. of Chemistry and Chemical Biology at Cornell University.\nThe whiteboard is sketched below. The lecturer faces the classroom and\nwrites on a sheet of illuminated glass with a fluorescent pen. The\nfront-facing camera on the iPad behind the glass captures a video of the\nlecturer and his/her drawings and writing. Because the front camera\nflips the image horizontally, the lecturer's writing is not reversed.\nUnlike a traditional white board, the lecturer cannot obstruct the\nwriting. A full description of the whiteboard is given in E. S.\nSkibinski, W. J. I. DeBenedetti, A. G. Ortoll-Bloch, and M. A. Hines, \"A\nBlackboard for the 21\u003csup\u003est\u003c/sup\u003e Century: An Inexpensive Light Board Projection\nSystem for Classroom Use,\" *J. Chem. Educ.* **92,** 1754 (2015).\n\n![Schematic](www/Schematic.png)\n\nInstructions for constructing the digital whiteboard can be [downloaded\nhere](https://pubs.acs.org/doi/suppl/10.1021/acs.jchemed.5b00155/suppl_file/ed5b00155_si_001.pdf).\n\nA big thanks is due to Kirby Turner of White Peak Software, Inc. who\nwrote the original Big Screen and who graciously shared his source code.\nBig Screen II is a *de novo* rewrite of Big Screen with added\nvideorecording capability. All bugs are mine.\n\nDevelopment of the digital whiteboard was supported by the National\nScience Foundation under Award CHE-1708025.\n\n## Developed by\n\nPlease send questions, comments, and bug reports to\n\u003cMelissa.Hines@cornell.edu\u003e\n\n\n© 2020 Melissa A. 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