You mean 30% of a single frame or 30% of 13 thousand frames. 8 hours for almost 4 thousand frames is really not bad at all. And you will get huge files sizes because virtualdub will output an uncompressed file. Simple math will you get there (num frames * num pixels per frame * num bits per pixel). After effects can definitely export compressed videos (e.g. H264 mp4). I don't know about virtualdub encoding settings. If you want to render minutes of footage quickly, you're probably looking at the simplest scenes possible, or a render farm (you can find online render farms to upload your files to). Hope that helps. Thank you very much for your answer. If I must answer your first question: yes %30 13 thousand frames takes 8 hours I will try After Effect ofr encode my iff files. But My big problem is rendering takes very long time I mean I start my render yesterday and today it is myvideo_8463.iff Is not is bad? It is normal for mettal ray renders? I am really new on maya I am sorry because I ask many questions. My videos one frame is this https://drive.google.com/file/d/0B9z...ew?usp=sharing