[Milhouse]

The RPi isn't able to hardware decode progressive jpg images, and the message just means that slower software decoding is being used instead to create the cached image. The cached image won't be created in progressive format so will be hardware decoded in future, in which case you'll only see the message once per progressive image.





tl;dr: Absolutely normal, nothing to do with your streaming video issue.

A full debug log (wiki) would be useful.