Live stream to start with keyframe

Question

Hi,
In a .3gp file, it always start streaming at the first frame (zero seconds in to the stream), so the player always received an I frame first and displays the video correctly from then on.
In a live stream on the Quicktime server it start streaming at current frame (eg. 13 seconds after the encoder has started), so the server sends 5 P frames to the client first then an I frame. The client would display a distorted image for 5 seconds until an I frame was received.
Is there any setting on the QuickTime server to always send I frames (key frames) first for a live stream?
QuickTime Streaming Server Software Version: 5.5.4   Mac OS X (10.0.x)  

Answer 1

Big thanks for your reply
Really helped me on my long understanding way to upgrade my live chat application to
work with IOS devices.
So lets continue... make this important post to be a good helper for all developers on their way to stream to IOS devices.
If you can I clarify this - Nitin Goel says:
"Remember, that you need to publish video as H264 codec and audio as AAC/HEAAC for it to work with ios player.. Flash player may not yet support this combination.."
It is not possible for me to use Flash Media Live Encoder.
In this article:
http://sonnati.wordpress.com/2011/05/14/a-dream-comes-true-h-264-encoding-into-flash-playe r-11/
it says:
"A dream comes true: H.264 encoding into Flash Player 11"
and its done by this actionscript 3 code:
var h264Settings:H264VideoStreamSettings = new H264VideoStreamSettings();
h264Settings.setProfileLevel(H264Profile.BASELINE, H264Level.LEVEL_2);
stream.videoStreamSettings = h264Settings;
which will be connected to the NetStream like this i guess:
var h264Settings:H264VideoStreamSettings = new H264VideoStreamSettings();
h264Settings.setProfileLevel(H264Profile.BASELINE, H264Level.LEVEL_2);
nc = new NetConnection();
nc.connect("rtmp://example.com/livepkgr");
ns = new NetStream(nc);
ns.videoStreamSettings = h264Settings;
ns.publish("livestream?adbe-live-event=liveevent");
Is this what need to be done in order to publish video as H264 from webcam and Flash Player 11 in user browser?
And what about publish audio as AAC/HEAAC?
Another important thing:
I am writing my actionscript 3 code in my flash CS4 and publish it to swf.
With this code obviously it give me error...
do i need to upgrade to CS5 or CS5.5 and then i will be able to publish with this code?
again big thanks for any help
cheinan