Hello
I'm a student of the Informatic University of Madrid. I'm
delivering a processing motion pictures software in Linux. I need
low-latency field-rate capture and i've read in the video4linux list all
messages about this.
I only want to ask if finally it's possible to capture fields
instead of frames (obtaining a half time period to process) in
video4linux. I've studied video4linux files (videodev), system files
(ioctl.h, raw.c) and drivers files (bttv driver). The most similar thing
i've seen in v4l is the use of VBI device because v4l video seems work
only with frames.
I've read in v4l2 manual v4l2_field is just i'm looking for...Can i
work with fields in v4l without reprogram chip (to let me know when it
has read a field instead of frame, i know it isn't trivial) or i have to
use v4l2? If v4l2 only capture fields in frame time i neither can't use
it.Is bttv irq handler designed to be invoked once per frame? Could it
be possible reprogram bttv chip with the conexant's manual?
Thanks
Iñaki R. Zabalegui
gcypher@xxxxxxxx
