shelf life, I don't know what you mean, when you say there's nothing wrong with the DivX codec package at that link - do you mean, the codec itself would be good, if it wasn't packaged with malware? Did you try downloading and running it?
I did run Gspot, thanks. It said I needed a certain version of DivX, to play AVI/mpeg-4 video.
In looking around, I made a couple of my own discoveries.
Number 1, I couldn't find a copy of DivX codec anywhere, including the creators' site and videohelp.com, that wasn't packaged with HotsearchBar. And a quick search for *that* shows a slew of people asking for help to remove it and describing its malicious symptoms. And Spybot S&D identified it as malware, as soon as I tried to run DivX. I'm not willing to count on any entity that packages that with their software, to make it managable to avoid activating, once it's on my computer.
But 2nd! it appears that the open source codec, Xvid, does the same work as DivX. And no malware! or toolbars or ebay icons.
So, both DivX and Xvid provide the missing codec, DX50, or so it seems, as Xvid has made Windows Media Player play AVI video. I had not realized that more than one codec might do the same job. In a way, I'm more confused than before, ha
I wonder if any of the tools you've mentioned show all the possible codecs that will play a given file or format.