1. QuickTime Player is developed by Apple Company. QuickTime can play any multimedia such as audio, video, still images, text, VR, Flash animations, chapters and even alternate languages. ITune is bundled to the player. To convert QuickTime to avi, please install the QuickTime Player and QuickTime Directshow filter.

Install the avi video or audio encoder such as DivX, XviD.

Launch Open Video Converter, click the Open Video button, select a QuickTime file .mov or . qt for QuickTime to avi.

2. AVC is Advanced Video Coding.  H.264 is a kind of MPEG-4, a high video  compression standard technology. It provides incredible movie quality with the smaller video size. To convert AVC to avi or H.264 to avi, please install the related codecs such as quicktime player, hdx4, or FFDshow.