Kvazzup: Open Software for HEVC Video Calls

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    3 Citations (Scopus)
    167 Downloads (Pure)


    This paper introduces an open-source HEVC video call application called Kvazzup. This academic proposal is the first HEVC-based end-to-end video call system with a user-friendly Graphical User Interface for call management. Kvazzup is built on the Qt framework and it makes use of four open-source tools: Kvazaar for HEVC encoding, OpenHEVC for HEVC decoding, Opus codec for audio coding, and Live555 for managing RTP/RTCP traffic. In our experiments, Kvazzup is prototyped with low-complexity VGA and high-quality 720p video calls between two desktops. On an Intel 4-core i5 processor, the VGA call accounts for 17% of the total CPU time. Averagely, it requires a bit rate of 0.31 Mbit/s out of which 0.26 Mbit/s is taken by video and 0.05 Mbit/s by audio. In the 720p call, the respective figures are 46%, 1.13 Mbit/s, 1.08 Mbit/s, and 0.05 Mbit/s. These test cases also validate the feasibility of HEVC in different types of video calls. HEVC coding is shown to account for around 34% of the Kvazzup processing time in the VGA call and 45% in the 720p call.
    Original languageEnglish
    Title of host publication2017 IEEE International Symposium on Multimedia (ISM)
    ISBN (Electronic)978-1-5386-2937-6
    Publication statusPublished - Dec 2017
    Publication typeA4 Article in conference proceedings
    EventIEEE International Symposium on Multimedia -
    Duration: 1 Jan 1900 → …


    ConferenceIEEE International Symposium on Multimedia
    Period1/01/00 → …

    Publication forum classification

    • Publication forum level 1


    Dive into the research topics of 'Kvazzup: Open Software for HEVC Video Calls'. Together they form a unique fingerprint.

    Cite this