On Tue, 6 Aug 2013 17:53:03 +0800 "薛杰" <xuej at bokecc.com> wrote: > Video transcoding time is related with the size of the video and the > time of video,Whether a specific proportion? Should be both of them, and more, e.g., source and destination video bitrate, decoder, encoder, etc.. More detail you should go to google.