search

netoptimizer / IPTV-Analyzer

Fast MPEG2 Transport Stream Analyzer, based on Netfilter kernel module
www.iptv-analyzer.org
GNU General Public License v3.0
99 stars 55 forks source link

Difference between skips and discountinuity? #29

Open dsuded opened 7 years ago

dsuded commented 7 years ago

Hi,

We have setup the IPTV-Analyzer to monitor our multicast streams. We currently have more than 150 streams in monitoring, however we have some trouble understanding the difference between packet skips and packet discountinuity. In tvprobe.log and in our monitoring system we can see much more skips than discon and we have come to conclusion that discon drops are somewhat more important than skips. Am I right in this case? For example we have detected pixelization that last for about 2 seconds in one of our streams. By inspecting log we could see that in 3 minute interval there were 324 delta_skips and 60 delta_discon. That made us ask where is a border when pixelization starts happening.

Any help on this subject is greatly appreciated.

KyleHyde6 commented 7 years ago

IMHO that reffers to pixel skipped and pixel discontinued.

A discontinued pixel its more visual or more clear to human eye to see.

if u need help send me email to kylehyde45@gmail.com

ryci-us commented 5 years ago

It doesn't refer to pixel anywhere. Discontinuity counts how many times packets was lost (cc_curr!=cc_prev+1) Skips - counts (in reality guess, because it's calculated in cc_curr-cc_prev) how many packets was lost when discontinuity was detected.