[Elphel-support] how to increase the frame rate?

[Ákos Maróy]

Hi,

I wonder how to increase the framerate on an elphel camera?

When I do full resolution, mplayer seems to report a framerate of 10fps
or less:

VIDEO:  [MJPG]  0x0  0bpp  7.000 fps    0.0 kbps ( 0.0 kbyte/s)


but interestingly, I get the same framerate if I use half or quarter of
the image dimensions. also, even at full resolution, the CPU load on the
camera is actually not really high:

Mem: 28560K used, 12888K free, 0K shrd, 0K buff, 17072K cached
CPU:   7% usr  24% sys   0% nic  62% idle   0% io   1% irq   3% sirq
Load average: 0.44 0.33 0.22 2/38 1572
  PID  PPID USER     STAT   VSZ %MEM %CPU COMMAND
  779   778 root     S    44896 108%  30% /usr/local/bin/str
 1506  1433 root     R     1480   4%   6% top
 1432   727 root     R     1568   4%   2% /usr/sbin/dropbear
  776     1 root     S    44896 108%   0% /usr/local/bin/str
  778   776 root     S    44896 108%   0% /usr/local/bin/str
  764   763 root     S    30888  74%   0% /usr/local/sbin/php
  765   763 root     S    30888  74%   0% /usr/local/sbin/php
  763   762 root     S    30824  74%   0% /usr/local/sbin/php


so there is CPU room to enable a higher framerate. is there a way to do
so? or is there a bottleneck I don't see, that does not enable higher
framerates?


Akos