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Comment by ancorevard | Hacker News Reader

Converting GIF to MP4 creates a much better user experience and lowers file size:

  ffmpeg -i input.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" output.mp4

That makes a basic MPEG-4 video file, you probably want to specify h.264 by adding these switches:

-codec:v libx264 -preset slow -crf 23

Increase "crf" for a smaller file, decrease it for better quality.

FFmpeg defaults to H.264 for .mp4.

Correct. No need to specify.