| Dario De Agostini 2005-12-15, 7:45 am |
| lti-1a8g-LMbKfuCQv7pBDgjK7y7TUQ@public.gmane.org wrote:
>Hi again,
>
>Context: FCS 1.5.r2
>
>Could a performance option in the FCS configuration file induce a
>constant audio delay over video ?
>I think I read about it : a case where FCS would postpone the
>transmission of audio data for the time to have "sufficient" data to
>send, and resulting in audio/video desynchronisation. (But I think I
>read it in the fixed issue of the 1.5.r2 release ...)
>
>
wasn't it the opposite ?
with 1.5.2 video data can be "skipped" giving priority to audio data.
We don't have desynch problems...
but i have an idea:
>I'm experiencing a weird behavior on a live flash a/v streaming between
>three points : an encoder, the flashcom server, and my computer.
>The connectivy between the three entities are excellent, and the server
>hosting FCS is way off the needs for my current : bi-piv 3 Ghz, 2 GB DDR
>ram, and one 450 kbps live stream. (one publisher, one subscriber).
>Still, I'm experiencing a somehow "constant" audio delay over the video,
>not very noticeable (it's half a second at most), but present.
>
>
half a second is a lot...
may i ask you if you attached audio and video on 2 differents objects on
your subscriber ?
It's common to attach video data on a video object (es.
camera.mc.attachVideo(stream) )
and attach audio data on a separate clip in order to create a sound
object on it to adjust player volume
es.
audio_mc.attachAudio(stream);
var suondObj=new Sound(audio_mc);
soundObj. setVolume(volumeValueWhichComesFromASlid
erComponent);
if this is the case... well... it creates problems on our systems.
if you attach the audio on the video component (same object where you
attached the video data) you won't experience sync problems.
But you won't be able to adjust volume.
This happens with live streams only (and flash player 7, with 8 looks
like it's ok)... and looks like it only happens to us... i would be
happy to see it's not our problem 
Dario De Agostini
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