Yes, this dreaded problem! Im at the end of my wits here.
I have a GoPro Hero small onboard cam that records to .avi with Motion .jpeg compression. For the life of me, I cannot get Premiere Pro to recognize it, I just get the "unsupported compression in file" routine.
Ive done what Adobe and alot of people advised in other forums;
1. change the extension to .mpg
2. import the file, but right-click it before importing and change it to .mov extension.
3. Ive imported Pegasus and Morgan Motion Jpeg codecs probally 10 seperate times with no luck
My only way to get by this is to use VirtualDub to recompress the file BUT at the expense of file size. An 80meg raw file quickly becomes 300megs just by changing the codec. Do that 10 times and Im hurting!
Theres just got to be another way to have Premiere Pro recognize this file...maybe something Im missing with installing the motion jpeg codec...something?