[Live-devel] Number of frames

[Mallikharjuna Reddy (NAVT)]

Hi Ross,

We found that on the server side, we can use setMarkerBit() function to find
which packet belongs to which frame. This works fine for ES and PS streams.
But for TS streams, this market bit is not set when the frame is complete in
doSpecialFrameHandling() function in SimpleRTPSink.cpp file.

Any clues on this.

Thanks and Regards
Y. Mallikharjuna Reddy


-----Original Message-----
From: live-devel-bounces at ns.live555.com
[mailto:live-devel-bounces at ns.live555.com]On Behalf Of Mallikharjuna
Reddy (NAVT)
Sent: Thursday, December 28, 2006 9:19 AM
To: 'LIVE555 Streaming Media - development & use'
Subject: Re: [Live-devel] Number of frames



Hi Ross,

Thanks for the information.

I am looking on the server side for finding which packet belongs to which
frame.

Thanks and Regards
Y. Mallikharjuna Reddy


-----Original Message-----
From: live-devel-bounces at ns.live555.com
[mailto:live-devel-bounces at ns.live555.com]On Behalf Of Ross Finlayson
Sent: Wednesday, December 27, 2006 7:34 PM
To: LIVE555 Streaming Media - development & use
Subject: Re: [Live-devel] Number of frames


>We are using RTP server and client test programs to stream MPEG II files.
We
>need to find out which packet belongs to which frame. In the LIVE555 code
>base, the frame refers to picture header/GOP header/slice. However, we are
>looking for the complete video frame (picture). Since one complete frame
>goes in different packets, we need to find which packet belongs to which
>frame.

It wasn't clear from your message whether you are talking about the 
server end or the client end.  I presume you're talking about the 
client (i.e., receiving) end.

In most video RTP payload formats - including MPEG-2 - the RTP "M" 
(marker) bit is used to mark the last RTP packet  for each complete 
video frame.  You can test this bit (at the client end) by calling 
"RTPSource:: curPacketMarkerBit()".  (Note, for example, how the VLC 
code does this - in its "live555.cpp" code.)
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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