Try recording at 720p 30fps and see if it still happens.If the issue doesn't happen with those settings then your CPU or HDD may be too slow, Lagarith Losless make large files so 1080p 60fps maybe the issue.You could also try this x264 codec.With the x264 codec you will also need to convert videos to use an MP4 containter so that your rendering software Vegas/premiere Ect can read the file, for that you will need Avidemux.Pull the video file into Avidemux near bottom left it should say "format" select MP4 the click the floppy icon to save the file.