Can't save video file

[ymoussaba]

I ran this command : sudo timecut "http://localhost:8888/timecut/index.html" --duration=0.5 --selector="#canvas" --output="videos/vid.mp4"
But after capturing all the frames, timecut show an error and did not save the file:
{ Error: spawn ENOTDIR at ChildProcess.spawn (internal/child_process.js:355:11) at spawn (child_process.js:521:9) at makeProcessPromise (/Users/ymoussaba/.nvm/versions/node/v10.1.0/lib/node_modules/timecut/index.js:135:22) at /Users/ymoussaba/.nvm/versions/node/v10.1.0/lib/node_modules/timecut/index.js:176:16 errno: 'ENOTDIR', code: 'ENOTDIR', syscall: 'spawn' }

[ymoussaba]

My bad, ffmpeg wasn't installed