Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Editing › Importing camera movie files into Sony Vegas Movie Studio 6. › You need to install a M-JP
You need to install a M-JPEG codec. I tried Sony Vega for the first time yesterday and hit the same problem but a search of the knowledge base described this problem and provided a couple of links to download suitable trial software. I used the first link, downloaded, restarted Vegas and all was well.
PS. Have since registered (i.e. purchased) both Vegas and the codec.