Captions, transcription & AI video, explained properly
Practical guides and free browser tools for creators and small video teams — from SRT files and Whisper to FFmpeg, frame rates and export settings.
Latest guides
Hands-on, tested and written in plain English
Captions & SubtitlesCaption Reading Speed: Characters per Second, Line Length and TimingHow fast should captions be? A practical guide to characters per second, words per minute, line length and minimum durations, with worked examples.8 min readSpeech to TextHow Whisper Works: Speech Recognition Explained in Plain EnglishA plain-English look inside OpenAI's Whisper: spectrograms, 30-second windows, the encoder and decoder, special tokens, timestamps and why it hallucinates.8 min readAI Video CreationAn Honest Faceless YouTube Channel Workflow: From Idea to UploadA realistic faceless YouTube production workflow covering research, scripting, voice, visuals, editing and YouTube's rules on inauthentic content.8 min readCreator Workflow12 Essential FFmpeg Commands for Video CreatorsTwelve tested FFmpeg commands for creators: trim, join, extract audio, normalise loudness, burn subtitles, reframe to 9:16, grab thumbnails and compress.9 min readFile Sharing & PrivacyHow Browser-Based File Transfer Works: WebRTC, STUN, TURN and Encryption ExplainedHow device-to-device file transfer works in a web browser: WebRTC data channels, signalling, STUN and TURN, NAT traversal, relays and encryption in transit.8 min readCaptions & SubtitlesCaptions and Accessibility for UK Creators: What the Law Says and What Good Looks LikeA plain-English guide for UK creators to captions and accessibility: the Equality Act, public sector rules, WCAG 2.2, Ofcom, and practical caption quality.9 min readSpeech to TextHow to Get More Accurate Transcripts: Recording and Settings TipsPractical ways to cut transcription errors: better recording, clean audio prep with FFmpeg, the right Whisper settings and a quick review routine.8 min readAI Video CreationFrame Rates Explained: 24, 25, 30, 50 and 60 fps, and Why the UK Uses 25/50A practical guide to frame rates for UK creators: PAL 25/50 heritage, 50 Hz lighting flicker, 23.976 and 29.97, and how to avoid problems mixing frame rates.9 min readCreator WorkflowAI Video and Captioning Glossary: 54 Terms Explained from A to ZPlain-English A–Z glossary of AI video, captioning and transcription terms, from aspect ratio and bitrate to Whisper, word error rate and seeds.9 min read
Free tools
Everything runs in your browser — nothing is uploaded
⏱️SRT Shifter & ConverterShift subtitle timings forwards or backwards, stretch for frame-rate changes and convert between SRT and WebVTT.Free · runs in your browser📏Caption Speed CheckerPaste an SRT file and see characters per second, words per minute and line lengths for every caption.Free · runs in your browser🖼️Image ReplicatorBatch-duplicate and rename numbered images scene by scene, then download a ZIP. Runs entirely in your browser.Free · runs in your browser
Browse by topic
Captions & Subtitles8 guidesSpeech to Text5 guidesAI Video Creation8 guidesCreator Workflow6 guidesFile Sharing & Privacy3 guides
About AI Point
AI Point is an independent site about the practical side of making video with modern tools. We build caption and transcription utilities ourselves, so our guides focus on what actually works: correct file formats, sensible settings, honest trade-offs and repeatable workflows. Read more about us.