Every utility in FrameKit Studio runs directly inside your browser using JavaScript and on-demand WebAssembly (@ffmpeg/ffmpeg). Your video clips, audio tracks, and subtitle files never leave your device, giving editors and creators instant calculations and ready-to-run commands with complete privacy.
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Build frame-accurate FFmpeg command strings, calculate crop and pad filter coordinates, execute WebAssembly transcodes in the browser, and export multi-file batch scripts.
Assemble copy-ready FFmpeg CLI commands for trimming, codec conversion, CRF rate control, audio muxing, and looping, or run the command directly in your browser via FFmpeg.wasm CDN.
ffmpeg -ss 00:00:05 -i master.mov -c:v libx264 -crf 20 -preset slow -pix_fmt yuv420p -movflags +faststart output.mp4Compute exact pixel coordinates and preview visual framing for FFmpeg crop and pad filtergraphs when converting between 16:9, 9:16, 4:5, and 1:1 formats.
Generate downloadable Windows Batch (.bat) and Linux/macOS Bash (.sh) automation scripts to transcode, remux, or extract audio across entire folders of media.
Compute target CBR and two-pass VBR bitrates, camera RAW and ProRes disk footprints, macroblock-aligned scaling dimensions, and multi-node render durations.
Calculate the exact maximum video bitrate (kbps / Mbps) required to stay under a target file-size limit, or compute total file size from duration and stream bitrates.
Estimate SSD, RAID, and CFexpress storage requirements in GB and TB across Apple ProRes, Blackmagic RAW, RED R3D, XAVC, and uncompressed formats.
Compute distortion-free upscaling and downscaling dimensions alongside mod-2, mod-4, mod-8, and mod-16 macroblock-aligned resolutions for hardware encoders.
Predict total rendering duration, effective frames-per-second throughput, and render-farm node scaling from timeline duration or frame count.
Convert SubRip (.srt) files to WebVTT (.vtt) or plain text, shift and stretch desynchronized caption timestamps, and time voiceover scripts by speaking rate.
Convert SubRip (.srt) subtitle files into compliant WebVTT (.vtt) tracks or clean plain-text paragraphs while stripping broken formatting tags in browser memory.
Shift all .srt or .vtt subtitle cues forward or backward by milliseconds, or apply linear frame-rate drift scaling across a full timeline.
Calculate exact narration runtime from word count, syllable density, and inline [pause Xs] markers across broadcast, conversational, and documentary speaking rates.
Preview 9:16 vertical frames against TikTok, Reels, and YouTube Shorts UI overlays, and validate YouTube description chapter timestamps before publishing.
Upload a 9:16 frame or test composition on an interactive HTML5 canvas to check whether captions and graphics are occluded by TikTok, Instagram Reels, or YouTube Shorts UI buttons.
Validate YouTube description chapter lists against all official parser rules (00:00 start, minimum 3 chapters, 10-second minimum length, chronological order) and auto-format clean output.
Practical reference manuals covering encoding standards, rate control mathematics, subtitle timing, and vertical safe zones.
Complete technical reference for SDR and HDR bitrates, GOP length, chroma subsampling, and audio loudness when mastering for YouTube.
How to distinguish fixed millisecond latency from variable frame rate (VFR) and 23.976 vs. 24.000 fps clock drift, and repair both without losing quality.
Understand when to choose Constant Rate Factor (CRF), Constant Bitrate (CBR), Constrained Encoding (VBV), or Two-Pass VBR for archival and web delivery.
Pixel-level reference coordinates for 1080x1920 vertical timelines so burned-in subtitles, lower thirds, and product callouts never sit behind platform UI buttons.
How to calculate sustained write speeds, multi-cam edit bandwidth, and the 3-2-1 backup storage multiplier for production shoots.
Technical comparison of .srt and .vtt file structures, UTF-8 byte order marks, reading-speed limits (CPS), and line-length standards.