An Uniformalized Quality Encoding in Cloud Transcoding System

To provide video on demand (VOD) services to customers on IPTV or OTT, it is necessary to transcode the contents to suit the playback device and the user’s viewing experience. This paper introduces a multi-pass quality control method designed to achieve consistent video quality when transcoding IPTV VOD content within a transcoding system specifically configured for cloud computing environments. We conduct performance testing by implementing this method as a commercial service, utilizing a parallel processing encoding workflow that is specifically optimized for cloud environments. The proposed method successfully achieves the required visual quality for each chunk, ensuring stable video quality across various types of content. Moreover, the encoding time is on average 1.21 times longer compared to a single pass of encoding.