[FFmpeg-user] why ffmpeg takes lot of cpu?

[Carl Eugen Hoyos]

2017-11-26 22:01 GMT+01:00 Reindl Harald <h.reindl at thelounge.net>:
>
>
> Am 25.11.2017 um 19:03 schrieb comp4me:
>>
>> If I will use thread 1 will i get 100% cpu and not 250% cpu?
>> but the performance will be the same?(that what i not understand)
>
> no it will not - the remaining cpu usage is not just for fun
> what the hell do you expect from video encoding?
>
> "why ffmpeg takes lot of cpu?"
> because it needs it?

While this is of course all true, it should be noted that real-world
(non-intra) video codecs typically scale very badly, so speed
is expected to be approximately half or better for the example.

Carl Eugen