Out-of-sync and skipping sound on live TV

  • Hello I have just upgraded my two raspberry Pi from the latest stable release of Openelec.

    The first is a Pi1 Model B, connected directly to a TV.

    The second is a Pi2, connected to a TV via an AV amp.

    I have noticed an odd problem that only occurrs on the Pi2 and only when I am watching live TV:

    1. Whenever I change channel, the sounds seems to go out of sync with the video and
    2. If I am watching an HD channel, the sound seems to cut out for about half a second every four seconds or so

    By background (in case it is relevant) I am using the Argus TV backend with the Argus plug-in.

    Any advice on how to sort this problem out would be much appreciated.