[Martin Jovanovic]

I hade a somewhat similar problem: exported from Camtasia as 1080 mp4 and imported that to Vegas 13. On the Vegas timeline it was darker from the start. As I had no time then, I just used a filter to brigten those clips and get the job done.

Now I came back to this problem and found a solution. When you export from Camtasia, use the custom export preset – create your own. Choose avi as the export format, then click Next, then on the next dialog click on the Compression button and choose uncompressed. I left all other settings intact and exported, then imported into Vegas, then created several seconds of solid white (Media Generator in Vegas) and compared the two clips, played one after another. No difference in white.

Guess this did the job in my case, hopefully it’ll do in yours.