That's... a lot more complicated. You need to merge in these changes here, recompile dolphin, and enable dump frames, and dump audio. That will give you a video, and audio. The video is vfr, and needs to be converted to cfr. Alternatively, enable dump audio to avi, and the video will be properly converted to cfr automatically. There's more info at http://tasvideos.org/forum/viewtopic.php?t=12601 and http://tasvideos.org/forum/viewtopic.php?t=14192
If you'd like, here's a version if 4.0.2 that includes the avsync patches: https://dl.dropboxusercontent.com/u/11111638/p/Dolphin-4.0.2-avsync.7z
If you'd like, here's a version if 4.0.2 that includes the avsync patches: https://dl.dropboxusercontent.com/u/11111638/p/Dolphin-4.0.2-avsync.7z