RTP/RTCP Reception Hint Tracks for Video Call Recording and Playback

Joni Räsänen, Marko Viitanen, Jarno Vanne, Timo D. Hämäläinen, Miska Hannuksela, Vinod K. Malamal Vadakital

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

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    This paper proposes to use RTP (Real-time Transport Protocol) Reception Hint Tracks for convenient recording and playback of a video call in MP4 format. The feasibility of RTP Reception Hint Tracks is validated as a part of an implemented end-to-end video call system. The proposed approach records a bidirectional Linphone video call and multiplexes it as MP4 RTP Reception Hint Tracks with the L-SMASH software library. It also stores RTCP (RTP Control Protocol) Reception Hint Tracks for additional timing information. Playback of the MP4 file is performed with VLC Media Player that is made compatible with RTP Reception Hint Tracks. The proposed proof-of-concept setup meets particularly well the needs of multi-codec solutions where different audio and video codecs can be used for a video call recording and playback. According to our analysis, recording RTP reception Hint Tracks increases the Linphone CPU time by under 1% and the bitrate by under 2% over the bare bitrate of the recorded RTP packets.
    Original languageEnglish
    Title of host publication2016 IEEE International Symposium on Multimedia (ISM)
    ISBN (Electronic)978-1-5090-4571-6
    Publication statusPublished - Dec 2016
    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


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