Ethereal-users: Re: [Ethereal-users] RTP Analysis

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

Date Index Thread Index Other Months All Mailing Lists
Date Prev Date Next Thread Prev Thread Next
From: "Martin Regner" <martin.regner@xxxxxxxxx>
Date: Wed, 6 Oct 2004 18:19:18 +0200
Philippe Deeve wrote:
> 
> > When I am looking at a trace I see the value of SET under the
> > MARKER heading.  What does that mean?
> 
> in my experience with RTP the MARKER bit is SET (true) if the payload of the
> RTP packet contains the last data of a frame. The next packet contains the
> start  of a new frame!

For audio streams the marker bit is normally SET for the first packet after a period of silence during
which packets has not been sent contiguously.

For video streams the marker bit is normally SET to indicate the last packet of a video frame.

For more information see the RFC3551 and maybe also documentation for the specific codec that is used.