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Hi,<br>
The <tt><tt>sprop-parameter-sets in SDP can be used to transmit SPS
and PPS. if the streaming server used </tt></tt><tt><tt>sprop-parameter-sets
to indicate the SPS and PPS, you will not get them in raw dumped stream.<br>
pls refer to <a class="moz-txt-link-freetext" href="http://www.rfc-archive.org/getrfc.php?rfc=3984">http://www.rfc-archive.org/getrfc.php?rfc=3984</a><br>
<br>
</tt></tt>Ratin wrote:
<blockquote
cite="mid:5c70701a0902141258i5978a977t72383b2c45540cb1@mail.gmail.com"
type="cite">
<div class="gmail_quote"><span style="border-collapse: collapse;">
<div>Hi I am trying to dump a h.264 1080i source stream into raw
bitstream file, the stream plays fine on mplayer over rtsp. However
when I dump the video stream using -dumpvideo and -umpfile mplayer
can't play it back. It looks like the bitstream only has one IDR frame
(00 00 00 01 65) and no other NALU like sps/pps and mplayer complains
about not finding them. But the rtsp stream version works flawlessly.
If I look at the wireshark trace, I see that the stream starts with
the rtp payload</div>
<div> </div>
<div>0x7c 85 88 84 ..very first rtp packet</div>
<div>0x7c05d34f ... 2nd rtp packet</div>
<div> </div>
<div>:::::</div>
<div> </div>
<div>:::::</div>
<div> </div>
<div>0x7c457c1ff being the last one in the gop (marker bit
set)</div>
<div> </div>
<div> </div>
<div>i think thats an idr frame..</div>
<div> </div>
<div> </div>
<div> </div>
<div>the subsequent frames rtp payloads are:</div>
<div> </div>
<div>5c819a20 first RTP paket of 2nd frame (possibly a p frame? ) </div>
<div>5c01ff37 2nd RTP packet</div>
<div>:</div>
<div>534172c4 last RTP of 2nd frame and mrkar set<br>
</div>
<div> </div>
<div><br>
</div>
<div>roughly about 35 frames of type 5c81 .. 5c01 .. 5c41 's</div>
<div><br>
</div>
<div>then it repeats with </div>
<div><br>
</div>
<div>7c858884 etc</div>
<div><br>
</div>
<div><br>
</div>
<div> </div>
<div>etc etc</div>
<div> </div>
<div> </div>
<div>Anybody have any clue how to interprete these nalu headers in
terms of</div>
<div>anex b style bitstream?</div>
<div><br>
</div>
<div>why would mplayer only convert the first IDR and not the other
ones ? Is there anything missing from the subsequent IDR frames? Where
are the SPS and PPS?</div>
<div> </div>
<div>thnx</div>
<div> </div>
</span></div>
<br>
<pre wrap="">
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Satheesh Ram
</pre>
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