Live Broadcast Audio/Video Out Of SYNC Help !!! 2004-03-19 - By Srinivas Nagarajan
Back
Hi Kevin
Will setting the capture size of the camera to 320,240 and setting it at 30
fps increase the lag at the reciever's end. My concern is better quality .
Setting it to 30 fps at publishers side , i still get only 9 fps at
reciever's end ? My video window at the reciever's end is also big .
I increased the buffer size at the recv end, after it buffers there seems to
be a audio/video out of sync
Have you done any broadcast apps like this ? any example will be appreciated
Is it possible for you to take a look at my web cam quality ? i am online
Thanks
Srinivas
>From: "Kevin Towes (New Toronto Group)" <ktowes@(protected)>
>Reply-To: flashcomm@(protected)
>To: <flashcomm@(protected)>
>Subject: RE: [FlashComm] Live Broadcast Audio/Video Out Of SYNC Help !!!
>Date: Fri, 19 Mar 2004 11:02:00 -0500
>
>You've got some serious expectations on the bandwidth:
>
>|localCamera.setMode(320,240,30);
>|localCamera.setQuality(0, 90);
>
>My guess is that you should scale down your compressor settings to:
>
>localCamera.setMode(240,180,12);
>localCamera.setQuality(0, 85);
>localCamera.setKeyFrameInterval(4);
>
>- reduce your frame size, your frame rate and your quality
>- monitor your app inspector to understand how much bandwith you are using
>- add a KeyFrame interval (suggest 2 or 4) - this will help.
>- if you need this quality -- increase the buffer size on the subscriber.
>
>Kev.
>
>
>__ ____ ____ ____ ____ ____ ____ _____
>Kevin Towes, Sr. Consultant
>New Toronto Group, ktowes@(protected)
>Mobile: 416-882-4445
>
>
>
>|-- --Original Message-- --
>|From: Srinivas Nagarajan [mailto:srinivas_vnow@(protected)]
>|Sent: 19 mars 2004 10:49
>|To: flashcomm@(protected)
>|Subject: [FlashComm] Live Broadcast Audio/Video Out Of SYNC Help !!!
>|
>|
>|Hi ,
>|
>|I am facing a Audio/Video out of Sync problem at the
>|reciever's end during a
>|live video
>|broadcast.
>|
>|At the publisher's side:
>|
>|
>|PUBLISHER:
>|*********************
>|1. Bandwith is set to LAN
>|
>|localCamera = camera.get();
>|local_mic = Microphone.get();
>|localCamera.setMode(320,240,30);
>|localCamera.setQuality(0, 90); bcast_video.attachVideo(Camera.get());
>|bcast_ns = new NetStream(room_nc);
>|bcast_ns.attachAudio(local_mic); bcast_ns.attachVideo(localCamera);
>|bcast_ns.publish("bcast_source","live");
>|
>|
>|At the reciever's side:
>|******************
>|1. Bandwith is set to LAN
>|
>|bcast_ns = new NetStream(room_nc);
>|bcast_ns.setBufferTime(5);
>|bcast_video.attachVideo(bcast_ns);
>|bcast_ns.play("bcast_source");
>|
>|
>|
>|I do a live broadcast playing a movie through DVD player and
>|publishing a
>|live stream through FCS.
>|My embedded video widow is 120 X 120 at publisher's side and
>|30 FPS.) and my
>|client is in Australia(on high speed connection) and has his
>|bandwith set to
>|LAN. His receiving embedded video widow is 430 X 380 . He sees
>|frame by
>|frame of video(not smooth) and audio is out of sync with video
>|even with a
>|10 seconds buffering. The video buffers for 10 secs and plays
>|the audio
>|which is out of sync with the video (audio comes earlier than
>|video) .The
>|netStream.bufferLength always shows between 9.7 and 9.9 secs
>|.Any idea why
>|this might be happening?
>|
>|Is this a buffering problem ?
>|Or is it because of larger video window at the reciever's end
>|? Any help would be really appreciated.
>|
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