Ffmpeg Unknown input format: 'lavfi'

Question

I tried to create such a test video using the ffmpeg "lavfi" device, but my Ubuntu LTS told me:

"Unknown input format: 'lavfi'"

I realized that my ffmpeg seems to have missed this device. But how to fix it?

I used this:

ffmpeg -f lavfi -i testsrc=duration=120:size=1280x720:rate=30 test.mp4

Answer 1

You can do ffmpeg -formats | grep lavfito see if it supports the format.

ffmpeg , . PPA Trusty, git . .