never had prob before in previous vegas versions...avi's are not recognized...avi's work fine with vegas movie studio 10 but not on vp11 on the same pc...
How were the avi's made? What codec? If you're not sure, download Mediainfo, open an avi file in it, switch the view mode to "text", and copy/paste the info here.
General
Complete name : X:\My Videos\Eire\avi convert\00010.avi
Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 77.5 MiB
Duration : 6s 39ms
Overall bit rate : 108 Mbps
Video
ID : 0
Format : Canopus HQ
Codec ID : CUVC
Codec ID/Info : Canopus HQ
Duration : 6s 6ms
Bit rate : 106 Mbps
Width : 1 440 pixels
Height : 1 080 pixels
Display aspect ratio : 4:3
Frame rate : 29.970 fps
Bits/(Pixel*Frame) : 2.283
Stream size : 76.2 MiB (98%)
Audio
ID : 1
Format : PCM
Format settings, Endianness : Little
Format settings, Sign : Signed
Codec ID : 1
Duration : 6s 39ms
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 1.11 MiB (1%)
Interleave, duration : 33 ms (0.99 video frame)