{"id":18379948,"url":"https://github.com/samdbmg/ffmpeg-uhd-tests","last_synced_at":"2025-10-05T16:54:33.109Z","repository":{"id":77014907,"uuid":"197232381","full_name":"samdbmg/ffmpeg-uhd-tests","owner":"samdbmg","description":"Generate a test image that flashes on one pixel at a time to test screens. Based on a tweet.","archived":false,"fork":false,"pushed_at":"2019-07-16T21:50:00.000Z","size":16,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-04-11T18:08:37.239Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/samdbmg.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"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":"2019-07-16T16:45:56.000Z","updated_at":"2019-07-17T12:10:00.000Z","dependencies_parsed_at":"2023-02-28T20:00:42.548Z","dependency_job_id":null,"html_url":"https://github.com/samdbmg/ffmpeg-uhd-tests","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/samdbmg/ffmpeg-uhd-tests","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/samdbmg%2Fffmpeg-uhd-tests","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/samdbmg%2Fffmpeg-uhd-tests/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/samdbmg%2Fffmpeg-uhd-tests/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/samdbmg%2Fffmpeg-uhd-tests/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/samdbmg","download_url":"https://codeload.github.com/samdbmg/ffmpeg-uhd-tests/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/samdbmg%2Fffmpeg-uhd-tests/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":278486278,"owners_count":25994941,"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","status":"online","status_checked_at":"2025-10-05T02:00:06.059Z","response_time":54,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"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":[],"created_at":"2024-11-06T00:41:31.346Z","updated_at":"2025-10-05T16:54:33.088Z","avatar_url":"https://github.com/samdbmg.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Generate a per-pixel test pattern\n\nBased on a silly idea: https://twitter.com/mikechislett/status/1150861136239239168\n\nBut unlike that tweet, this flashes each pixel for one frame, and repeats every 100 lines (or other configured value)\n\n## To build it:\n- Be on Linux\n- Install CMake and a compiler (`sudo apt install cmake build-essential`)\n- Install FFmpeg (`sudo apt install ffmpeg libavcodec-dev libavformat-dev libavutil-dev libswscale-dev`)\n- `(mkdir build \u0026\u0026 cd build \u0026\u0026 cmake .. \u0026\u0026 make)`\n\n## To run it:\nSomething like:\n```\nbuild/ffmpeg-uhd-test hd-flash.mp4 1920 1080 100\n```\n\n## Can I see the output files?\nYes! https://www.dropbox.com/sh/euny7f5ffpog6m2/AACTXWU0bW2LjnmQ5MfGQcyUa?dl=0\n\n## Why is the file called muxing.c?\nIt started life as the [FFmpeg muxing example](https://ffmpeg.org/doxygen/4.1/muxing_8c_source.html)\n\nI just changed the pattern and took all the audio bits out.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsamdbmg%2Fffmpeg-uhd-tests","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsamdbmg%2Fffmpeg-uhd-tests","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsamdbmg%2Fffmpeg-uhd-tests/lists"}