That is correct you should first adjust your video resolution to one that
your presentation is going to handle. The problem with digital video is to
decide if you want quality or performance on playback. Every video that you
like to play at full screen is going to be compressed. This means that you
will loose a litle bit of quality but your playback is going to be good or
with no drop frames. This has to do more with the kind of CODEC you use to
compress the video that with the format of the video.
But in my personal opinion I think you have to compress not by software but
by hardware. Hardware is much more efficient that software when compressing
but at the same time it will keep the size of the file low and at great
quality. I haven't made a video of that size but the largest I've made was
of 2 minutes and 43 seconds of 24 bits animation at 640 x 480 using cinepak
and I use Director 6.5 to display it from a CD-ROM. The file weights
aproximately 275MB and it run perfectly. What I am trying to explain is the
bit rate is one of the factors that you have to consider but there are more.
The size of the file is a factor too because compression means time of
processing to decompress and a larger file with redundant data would cause
drop frames sometimes by you CPU and not for the HD or CD drive. De maximum
data transfer that your CD or HD bus can handle is another. The CPU's
interruptions, etc.
All the above solutions I think are correct and are part of the solution. I
hope my opinion helps.
See you!
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of Bastien Bouchard
Sent: Friday, September 07, 2001 12:24 PM
To: [EMAIL PROTECTED]
Subject: RE: <lingo-l> Quicktime Hanging!!??!!
> I have a presentation that my company is making that starts off with a
> 35-second intro video which loops. I've done it in quicktime, and put
> Sorenson compression on it limiting the data rate to 900. It will be run
> from a PIII-800 with 256M of RAM, and it still hangs sometimes. Is there
> anything else that I can do to ensure that this will not hang.
> The video is
> pretty big 720x486. What is the best compression scheme to use? What
> parameters should I use to compress it, etc.
I guess this video rather 720 x 480, wich is standard NTSC DV size. Get the
source file and Compress it with TMPEG Encoder (free and very good!)in Mpeg
2 (if you have a soft DVD player installed) or Mpeg 1 (if not!) with
"deinterlacing" option selected. No problem on my PIII 600 to play such 30
fps videos (drop the frame rate to 15 fps if you need).
Bastien Bouchard
Logique multim�dia
[EMAIL PROTECTED]
> -----Message d'origine-----
> De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De la
> part de Geoffrey B. Holland
> Envoy� : 6 septembre, 2001 13:12
> � : Director Lingo User Group
> Objet : <lingo-l> Quicktime Hanging!!??!!
>
>
> Hello,
>
>
> Any help would be greatly appreciated.
>
> Thanks,
>
> Geoffrey B. Holland
> Interactive Multimedia Specialist
> K-fx�, Inc.
> www.kfx2.com
> v: 225.927.4463
> e: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
>
>
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>
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