# Reelpass > Check a music exam video against the board's published size, format and file name rules, fix the name, and shrink it under the limit, all inside your browser. The board's own page is the authority; check it before you upload. Reelpass checks your file against the published guidance on the date shown and cannot promise a board will accept it. Reelpass is not affiliated with, endorsed by or connected to any exam board, including ABRSM, Trinity College London or London College of Music Examinations. ## How it works Preflight: the page reads the video file's own structure (MP4 and MOV boxes) in the browser to find the container, video and audio codecs, running time, resolution, frame rate and size, and asks the browser's WebCodecs decoder whether it can decode the picture. It checks these and the file name against the chosen board's profile, and lists the rules a machine cannot check (one continuous take, the introduction, photo ID) as a checklist for the user to tick. Compression: the picture is decoded and re-encoded as H.264 with WebCodecs in a background worker, at a bitrate worked out from the board's limit, the running time and the size of the sound track, with a safety margin. The sound is copied into the new MP4 byte for byte, never re-encoded. Nothing is trimmed, joined or reordered. If the browser cannot decode the picture (often iPhone HEVC), the user is told how to fix it, and a slower ffmpeg build can be loaded on request. ## Board profiles (paraphrased from each board's own page) - ABRSM Performance Grades: at most 2GB (checked as 2.00 GB); MP4, MOV, MPG; file name: Letters, numbers, underscores and dashes only, and the name must not be blank. Source: "Performance Grades Guidance", read 27 September 2026. - Trinity College London digital music exams: at most 3GB (checked as 3.00 GB); MP4, MOV; file name: Forename and surname run together, then an underscore, the style and instrument run together, an underscore, and the grade: for example SamSmith_ClassicalPiano_Initial or JennyJohnson_JazzFlute_Grade5. Source: "Digital Recording Guidance (support article)", read 27 September 2026. - LCME (London College of Music Examinations) digital recorded exams: at most 1GB (checked as 1.00 GB); MP4, MOV; file name: Letters, numbers, underscores and dashes only (a Reelpass suggestion; the guide gives no file name rule). Source: "Quick guide to filming your LCME Digital Recorded exam (PDF)", read 27 September 2026. ## Tool pages - [Home](https://reelpass-web.pages.dev/): what Reelpass is: a music exam video preflight, file name fixer and compressor that runs in the browser. - [Check a video](https://reelpass-web.pages.dev/check/): the free preflight: pick an exam video and board, see size, format, codecs, duration, resolution, audio and file name checked against the board's published limits, tick the checklist, fix the name, and compress when it is over. - [Teacher batch](https://reelpass-web.pages.dev/batch/): a queue for teachers: a saved candidate list, file names generated from a pattern, a preflight per file, and compression one after another. ## Guides and references - [Guide](https://reelpass-web.pages.dev/guide/): what the three boards ask of an exam video, side by side, and the hub for every guide below. - [Performance Grade video requirements](https://reelpass-web.pages.dev/guide/performance-grade-video-requirements/): the 2GB limit, MP4, MOV or MPG, the file name characters, the introduction, photo ID at grades 6 to 8, and the 28 day upload window. - [Digital grade exam video rules](https://reelpass-web.pages.dev/guide/digital-grade-exam-video-rules/): the 3GB limit, MP4 or MOV, the fixed file name pattern, no spoken introduction and no edits, pauses or stops. - [Recorded music exam video rules](https://reelpass-web.pages.dev/guide/recorded-music-exam-video-rules/): the 1GB limit, mp4 preferred and mov accepted, 720p at 30 fps, and one continuous take for every component. - [How to shrink an exam video under 2GB](https://reelpass-web.pages.dev/guide/how-to-shrink-an-exam-video-under-2gb/): the bitrate arithmetic, a worked example from the Reelpass planner, what compression may and may not change, and the iPhone HEVC problem. - [Exam video file names](https://reelpass-web.pages.dev/guide/exam-video-file-names/): which characters each board accepts, the fixed pattern one board uses, worked renames, and how to name a whole class's files. - [Recording a continuous take](https://reelpass-web.pages.dev/guide/recording-a-continuous-take/): what one continuous take means, what may be edited (almost nothing), the introduction and ID hold, and a setup checklist. - [FAQ](https://reelpass-web.pages.dev/faq/): questions about privacy, the boards' limits, compression quality, iPhone files, file names and what is free. ## Optional - [Full reference text](https://reelpass-web.pages.dev/llms-full.txt): every guide and the FAQ as Markdown in one file. - [Privacy](https://reelpass-web.pages.dev/privacy/): what stays on your device (everything, including the video). - [Terms](https://reelpass-web.pages.dev/terms/): terms of use; a checking tool, not the board, and no promise of acceptance. ## What it is not - Reelpass is not affiliated with, endorsed by or connected to any exam board, including ABRSM, Trinity College London or London College of Music Examinations. - Not an exam board and not a submission service. It does not upload anything and cannot promise a board accepts a file. - Nothing is uploaded. Your video, candidate names and pieces stay in this browser; the checking and the compressing run on your own device. ## Pricing Free today. Everything on the site is free, with no account, and no paid plan is on sale in this build. ## Notes - Support: socialreminderinfo@gmail.com