FFmpegLab is a power tool for FFmpeg specialists. Edit the raw render script, build custom filter-graph effects, and run the whole pipeline offline — your footage never leaves your machine.
-i a4e260ec-e185-4165-b5b8-e6356a66ad4b.output.0.mp4 -i cf99446f-6827-4048-9278-fbfb2f84eab4.output.0.mp4 -filter_complex [0:v]loop=loop=150:size=1:start=0,setdar=16/9,scale=1280:720:force_original_aspect_ra [1:v]loop=loop=150:size=1:start=0,setdar=16/9,scale=1280:720:force_original_aspect_ra [v0?][v1?]concat=n=2:v=1:a=0,settb=expr=1/30[c1?]; [c1?]settb=expr=1/30[v_layer0]; [v_layer0]split[v_main][v_overlay];[v_main]settb=expr=1/30[v_concat];[v_overlay]nullsink aevalsrc=0:d=5[s0];[s0]adelay=delays=0|0,volume=10[a0?]; aevalsrc=0:d=5[s1];[s1]adelay=delays=5000|5000,volume=10[a1?]; [a0?][a1?]amix=inputs=2:duration=longest[a_concat] -aspect 16/9 -movflags +faststart -map [v_concat] -map [a_concat] -r 30 -ss 00:00:00 -to 00:00:10 -y aec78afd-12e2-4d9c_render_.output.mp4
A real timeline on top, the real command underneath. Switch between them whenever you want.
FFmpegLab never hides the engine. Drop into the actual FFmpeg rendering script, chain filters by hand, and keep full control over every render — no proprietary black box between you and the output.
[0:v]scale=1920:-2, setsar=1[base]; [1:v]format=rgba, colorchannelmixer=aa=0.6[ov]; [base][ov]overlay= (W-w)/2:(H-h)/2[v]
Start from 30+ built-in xfade transitions, then compose your own. Every effect is a real FFmpeg filter graph you can fork, tweak, and reuse across projects.
xfade=transition= wipeleft: duration=0.75: offset=3.0 # 30+ presets, # or write your own.
The whole pipeline runs locally on the browser file system and WebAssembly. Nothing is uploaded; sharing happens over encrypted peer-to-peer links you control.
Invite teammates into the same project, leave live comments at exact moments, and see timeline changes as they happen — without exporting another review draft.
How collaborative video editing works →FFmpegLab is open source and offline-first. Bring your own backend with a Docker Compose setup and own the entire editing pipeline — storage, rendering, and sync — end to end.
services:
ffmpeglab:
image: ffmpeglab/ide:main
ports: ["8080:8080"]
environment:
- FFMPEGLAB_HOST=http://localhost:8080/webapp/
- EVOLU_DB_HOST=http://localhost:4000
- EVOLU_DB_NAME=ffmpeglab
- PUBLIC_HOST=https://localhost:8080/
- PEXELS_API_HOST=https://pexels.starpy.me/
- SUPABASE_HOST=https://office.starpy.me
- SUPABASE_ANON_KEY=123456789qwerty
evolu:
image: evoluhq/evolu:pr-5
ports: ["4000:4000"]
# your machines. your footage. your rules.
Practical, copy-pasteable walkthroughs for the FFmpeg techniques behind every edit.
zoompan filter to create Ken Burns effects, dynamic slideshows, and cinematic camera
movements.xstack filter.SUPABASE_STORAGE_BUCKET environment variable for FFmpegLab. Upload files Of any size.-bsf Power Toolh264_mp4toannexb, h264_metadata, aac_adtstoasc, noise,
and more.hqdn3d, nlmeans, vaguedenoiser, bm3d,
and more.minterpolate filter. Master motion estimation, compensation, and scene detection.scdet, select, and blackdetect.zscale,
tonemap, and proper color space conversion for HDR10, HLG, and Dolby Vision.-map_metadata, -movflags, and the ffmetadata workflow.-loglevel, decode filtergraph
failures, debug stream mapping, and use the FFmpegLab IDE as your personal linting tool.alphamerge, maskedmerge, and the overlay filter with grayscale
masks.addroi filter and qoffset parameter.sendcmd, zmq, and timeline expressions for dynamic overlays, opacity
fades, and real‑time adjustments.Free in your browser — nothing to install, nothing uploaded.