When reading .avc-files the displayed image is black about after the 2 gigabyte-limit. Not a lot of use when having used 12 hours of rendering time to make intermediate files for multitrack editing. Also files of dissimilar lenght are shown in the timeline as having same length. Filesize is about 14 gigabytes.
Reformat your capture / storage drive to NTFS.
There is no known way to rescue large files recorded to FAT partitions. It's not Vegas, its Windows.
Then the file had not been rendered 14 gigabytes large by V17 - also btw. I edit the post because about half an hour into a file a couple of hours long is two gigabytes not four. And yes, all drives in this computer are formatted NFTS and it is a 2 terabyte drive.
Windows will NOT format anything in FAT32 that is larger than 32 gigabytes.
This a a V17 error on reading the file, not a codec error in generating it, the files play OK in VLC.
Raw .avc video streams are not meant for editing, they miss the appropriate wrapper. Mux these files into an MP4 wrapper before the use in Vegas Pro.
Aha, I just went with the suggested export-format, I scrapped them - no, I don't keep 3 times 14 gigabytes on a disk drive just to keep the space allocated - and I am rendering them as mp4's right now and getting rid of the interlace from the cameras.
The object of the exercise is to get files that are easy to align and have zoom-in applied on one version from each of the two Panasonic cameras used, using zoom and multicam editing simultanously is not possible and there is still no "lock in time" to prevent files from moving around once synced up. So aligning, cutting away the start and exporting is the safe way of doing it and make it an easy re-align if some mouseclick creates havoc.
I'll gamble that it is the solution and tag as solved, thank you!
Mux?