You can read more about the details of this approach here. Then run two passes on the video file after the log is created.įfmpeg -i your-video-file.mp4 -b:v 0 -crf 30 -pass 1 -an -f webm -y /dev/nullįfmpeg -i your-video-file.mp4 -b:v 0 -crf 30 -pass 2 output.webm.This setting created a great-looking video, and my WebM video ended up being 3.4MB – perfect! To convert an mp4 file to a webm file, run the following command: ffmpeg -i input.mp4 output.

The output format is estimated from the file extension, while the input format is auto-detected.

However, when converting an MP4 file of 8.5MB I got a WebM version that was 91.6MB – 10x larger! Instead, I recommend using -crf 30. You don't have to specify the input and output formats when converting audio and video files using FFmpeg. Next, to convert your MP4 video to WebM lossless, you need to use -crf 0 in the below commands. brew install ffmpeg Step 3: Convert MP4 to WebM To render your animation as an mp4 or webm, or also as a gif on Mac, Tahoma2D requires the FFmpeg multimedia framework to be installed on your machine. Using the terminal app run the following. bin/bash -c '$(curl -fsSL )' Step 2: Install FFmpeg To convert MP4 to WebM video on macOS, install FFmpeg using Homebrew.

Ubuntu ffmpeg mp4 to webm