Re: [videoblogging] formats

On 27/06/2004, at 5:16 AM, Lucas Gonze wrote:

> There are four, WMV, mpeg, Real and mov. The three proprietary formats
> have limited support outside of their dedicated rendering tools, WMP
> for
> WMV, Real for Real, QuickTime for mov. mpeg is supported by all video
> renderers as far as I know.

Quicktime is not actually a file format but a file architecture that
allows the playing back of formats. the difference is significant (for
eg i can play back some avi's inside of a quicktime movie, and qt 6
fully supports flash 5 files).

>
> I don't know enough to compare video quality and compression.
at the technical level signficant, at the domestic level it's PAL
versus Beta. One is better but in most contexts and with most people's
skill and knowledge the differences become minor. Ben Waggoner has a
book on video compression, that's where you go if you want to find the
nitty gritty stuff.
>
> Open standards are a very good thing for bloggish collaboration. My
> guess
> is that mpeg video is more likely to be watched than any of the other
> formats, and more likely to lead to a healthy collaborative
> environment.

mpeg 4 is probably best. mpeg 1 and 2 are not for networked
environments. Keep in mind that i *think* window's version of mpeg 4
(which is an open standard) does not conform.
>
> Real is the format I've used the most. In my experience, SMIL support
> is
> Real's edge. Real's video format is nothing special.

Real does support SMIL best. QT supports SMIL but not as well as Real.
In quicktime pro mpeg 4 is OK, sorenson 3 is excellent but slow to
compress as it does two passes if you're using the professional codec.
which remminds me, sorenson 3 is in quicktime but if y ou're serious
abut cmpression you pay for the pro codec which is *appreciably*
better. you don't need the pro codec for playback, just compression.
but it is expensive and not open standard so for my money mpeg 4 is
definitely superior. if it is just video and audio mpe4 then any
compliant player can view it, anywhere.

cheers
Adrian Miles
………………………………………………………..
hypertext.rmit || hypertext.rmit.edu.au/adrian
interactive networked video || hypertext.rmit.edu.au/vog
research blog || hypertext.rmit.edu.au/vog/vlog/