[Motion-user] Still looking for reason for slow frame rate with FreeBSD

[Rowan 2. <row...@se...>]

Hi all

I've mentioned this issue before, changing from an old 1.2GHz Duron to a 
3GHz Pentium D didn't really make much difference - the maximum 
reliable/consistent frame rate is still about 4-5fps. If I set 'framerate' 
any higher then it gets jerky and starts skipping frames which skews the 
perception of time.

I've been playing with 'transcode' this evening and one bonus is that it 
displays the output frame rate... I can see clearly that it's having no 
problems capturing at 25fps, and that is including realtime encoding using 
an mpeg codec. The encoded video plays back perfectly.

With motion, I don't think it's a processing issue because the CPU time 
consumed is so small that the load normally stays at or very close to 
0.00.

   PID USERNAME    THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU COMMAND
51028 root          4  20    0 23568K 18328K kserel 0   1:08  0.00% motion

I suspect it's some sort of FreeBSD bktr interface quirk. Does anyone know 
of the issue, and possible fix? FYI I was using 3.2.8, just upgraded to 
3.2.9 via the FreeBSD ports system without any change in performance. I 
would try a newer version but the last time I tried to compile directly 
from source I wasted a couple of hours wrestling with ffmpeg versions and 
FreeBSD patches before giving up. :-/ I'm at a distinct disadvantage by 
not being a Linux user...

Thanks for any tips.

Cheers.