From: Remo Jin <[EMAIL PROTECTED]>
Subject: Video Quality/ Bandwidth Questions
Hi,
I'm just wondering if anyone could answer a few questions
I have about streaming my presentation. As well, are there
any tricks that might be useful to increase the video / audio
quality if my target audience is 56.0 Modem connection.
Current Presentation Specs:
Real Pix - (Background 1) : 6.0 Kbps
Real Pix - (Slides) : 3.6 Kbps
Video & Audio : 24.4 Kbps
Total Required Bandwidth: 34 Kbps
* Equal to the suggested max. bit rate
Timeline of my presentation:
0 - 20secs :
- Background Image appears.
20s - end :
- Background image changes at the 20sec mark and stays
constant till the end.
- Video starts at the 20sec mark, plays till end.
- Throughout this segment(20sec - end) , images (ie: slides)
are replaced at certain times corresponding to what is said
in the video.
Q1: When a my stream is opened it currently streams at 34 Kbps.
However, if an image like the second background is only required once
and stays constant throughout the presentation, can the 6.0 Kbps
stream (allocated for that particular Real Pix stream) be used by the video!?
Q2: If so, does it mean that in my case, the video can be encoded higher
than 24.4 Kbps, to utilize the bandwidth not used by other streams!?
ie: my video can now be encoded at:
24.4 Kbps + 6.0 (unused) Kbps. = 30.4 Kbps !?
without worrying about not having enough bandwidth, and cause it to
crash!?
Q3: Does the max. suggested BitRate of 34 Kbps, (in the real player docs)
mean that as long as you ensure your not streaming more than 34 Kbps
at "any one time" during the presentation, the stream will be stable!?
Q4: Does the total size of the stream (indicated in the bottom left in
the green real player controls) really matter!? Or as long as at any
point your not trying to exceeding the max. target bit rate of 34.0 Kbps.
the presentation will be stable (not crash)!?
- Remo
**********************************************************
Remo Jin, New Media Programmer
COMTEC
Direct: (403) 262-4623, ext. 119
*******************************************************
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