5 Jun
2013
5 Jun
'13
3:39 p.m.
Am 17.05.2013 um 22:34 schrieb Carsten Kurz:
I thought j2k encoding speed was more or less
independent from content complexity. At least I wouldn't expect a 1:4 speed difference
between 'simple' and 'normal' content. But will do more testing while
doing this project.
I just did a test comparison between my frame count test video (white numbers on black)
and a (static) synthetical colour noise pattern (noise at the single pixel level). Both
MP4, 1998*1080 24fps with stereo audio, all transcoding parameters identical, no
additional processing/filters enabled.
While the very simple frame count images compress at up to 3.6 fps in DVD-o-matic, with
the noise pattern it drops to 0.7fps on the same machine. That is a 1:5 difference between
best and worst case content!
Realworld footage from my Sony 1080p cam compresses at around 1.2fps.
Set J2k bandwith/datarate is irrelevant it seems.
That is again my i3-2310M notebook running at 2.1GHz with WIN7/64 (2core/HT, 4 threads
configured), 100% CPU load.
So, if we want to compare CPUs/machines, we definitely need a common test clip.
Carl - how is it going with the MacMini - do you have a Bootcamp windows installation on
it? What is the exact config of that machine?
- Carsten