Demuxing videos for import in to iMovie
Marie-Claude took a group of videos shot in Quebec on the new Sony camera and imported them in to iMovie. Although the videos played back with audio in QuickTime, iMovie was unable to detect an audio stream. The reason for this is that the video is muxed MPEG-1 (see here: http://docs.info.apple.com/article.html?artnum=42996). As a result of the camera recording in MPEG-1, image quality is not great, and file size is significant (approx. 20MB/minute).
I tried using Quicktime Pro to export a DV stream, but it does not appear to have any explicit capacity for demuxing. I downloaded MPEG Streamclip (from here: http://www.squared5.com/) and exported the video as DV25, de-interlaced video (which swells file size by a factor of about 10). iMovie happily, and quickly, imported the video with audio intact.