High CPU usage when audio transcoding?

[TheDreadPirate]

Keep in mind that ffmpeg will transcode as fast as possible. High utilization is fine as long as it is transcoding at a really high frame rate. In your case it is going at about ~350-400fps when just transcoding audio. Your setup could handle many more simultaneous audio transcodes before CPU performance became a problem. Assuming just audio transcoding, it could probably handle ~10 more simultaneous streams comfortably.

Pre-transcoding is an option, but it is a lot of work if you don't have consistently have 10+ users. If it is only you and 1-2 friends, your setup is perfectly capable of handling the load. Even video transcoding.