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@Wilbert
I have a real neat Radix PCI protector card on this computer which allows me to experiment a lot without ruining my system, so everytime I log on I have to install AviSynth, Xvid, etc. It just takes a minute and I highly reccommend it, because many of these media codecs are very stuborn when it comes to removing them.
Anyway, the only MPEG4 decoder I had on my system was Xvid. The file I wanted to open was DivX. Xvid opened it in VirtualDub but after the first frame it was a mess. So I installed ffvfw and set it to decode DivX, but after turning Xvid off ( in Vswap) I could no longer open the file because ffvfw evidently couldn't decode the YVI2, but after installing the Helix codec not only could I open it with ffvfw, but that codec did a good job of decoding the MPEG4.
I didn't realize ffvfw could be set to decode Helix YV12, or maybe I just don't understand your question and what you are trying to point out. Please clarify, Thanks.
t_2
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