Quoting Chris Lawrence <email@hidden>:
> Greetings all,
> I am a new member of this group and a bit of a novice, but I hope you
> can
> bear with me. I have been charged with producing a monthly webcast of
> a
> training class for our clients. The sound quality of our webcast is
> great,
> but the video is terrible, even at small resolutions.
>
> We're currently broadcasting at 320x240 and management wants bigger and
> sharper, even at the expense of higher bandwidth. We broadcast a
> computer
> image from a Titanium G4 powerbook (outputting 800x600 via s-video) and
> multiple camera signals all switching through a Sony input switcher.
> The
> s-video and composite video outs run from there into an InterView box
> (video
> to usb converter), which then runs into our Blue G4 (400mhz, 320mb) OS
> X
> server running 10.2.5 with QTSS and QTB.
[snip]
The first problem will be USB: even if your video was limited to 8 bits depth per pixel
the data rate will be 4 megabits per frame. Choose your frame rate ;-)
You may have problems running both Broadcaster & Streaming Server on
the same box, and a minimally specified box, with all due respect.
I have been taking notes here to convince management about the hardware budget,
where our subject matter is musical performance pedagogy, and fullmotion is needed.
Dual G4 1G 768M ram, cpu usage indicated in Broadcaster window:
15 - 25% each for 128kbps stereo 44.1 khz audio only;
35 - 40% each, above plus 25fps 320x240 video;
Single G4 800mhz 768M ram, audio + video as above, 65 - 75%
Single G3 800mhz 320M ram, as above, 97% and frame rate drops to less than 7 fps
In all cases the video input is via firewire from dvcam.
peterk
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