====== FFmpeg ======
===== Convert =====
==== webm to mp4 ====
Since Wix doesn't support Webm...
<code bash>ffmpeg -i input.webm -c:v libx264 -crf 18 -c:a aac -b:a 192k output.mp4</code>
  * Audio sync problems: Use **-async 1** parameter in FFmpeg
  * Large file sizes: Increase CRF value (lower quality) or reduce bitrate