temporal_filter 8 seems to be default here. Just wanted to let you know. (using ivtv 0.9.1)
Maarten. On 12/19/06, Trevor Bradley <[EMAIL PROTECTED]> wrote: > > > > > I've just discovered the magic of the temporal filter on the Hauppauge PVR > cards (see my previous post). In brief, appears to clean up a noisy analog > signal to give a cleaner mpeg recording. However, I note that there appear > to be several other filters. If I run "v4l2-ctl -l | grep filter" on my > machine, I appear to get parameters for: > > > > spatial_filter_mode (0), > > spatial_filter (0) > > spatial_luma_filter_type (1) > > spatial_chroma_filter_type (1) > > temporal_filter_mode (0) > > temporal_filter (8, was 0) > > median_filter_type (0) > > median_luma_filter_minimum (0) > > median_luma_filter_maximum (255) > > median_chroma_filter_minimum (0) > > median_chroma_filter_maximum (255) > > > > the numbers in brackets are my current settings for these parameters. > > > > By simply changing my temporal_filter from 0 to 8, I saw a dramatic > improvement in image quality. This gets me thinking that modifying these > other numbers might be useful, but I've not found any documentation > whatsoever on these filters, and I'm hoping someone might be able to > enlighten me. > > > > Can anyone explain what the ivtv spatial, temporal, and median filter > settings actually do? Are they hardware or software filters? What's the > difference between the filter and the filter type? What settings are > appropriate for a TV? What numbers are too high? (I noticed that a > temporal filter setting of 10 caused mpeg recording errors, and a max > setting of 31 generated some bizarre visual effects). Should this > information be documented in the wiki? > > > > This question belongs in ivtv-users, but the people who would be able to > answer the question are likely lurking in ivtv-devel. Hopefully some of the > developers read both groups. > > > > Trevor Bradley > > Surrey, BC. Canada > > > _______________________________________________ > ivtv-users mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-users > > _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
