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  1. Member
    Join Date
    Jun 2017
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    Redmond
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    This thread documents my attempt to capture ac3/dts bitstreams from HDMI. Maybe help save other people some frustration and/or spending money on useless devices.

    HDMI devices confirmed unable to capture ac3/dts bitstreams:
    INOGENI - all products - confirmed by manufacturer
    AV.io - all products - confirmed by manufacturer
    PENGO - all products - confirmed by manufacturer - "Maybe future models will support it"
    Blackmagic - all products - confirmed by manufacturer
    Elgato - all products - confirmed by manufacturer
    Yuan - all products - rebadged elgato cards

    HDMI devices with possible support, but unconfirmed:
    Magewell Pro HDMI - "support via sdk" - not useful to end users

    A different approach is using an HDMI splitter to extract the bitstream into spdif. The problem is that all audio capture devices tested so far mute the input if the NON_AUDIO flag in the spdif stream is set - which it is with ac3/dts.

    SPDIF audio capture devices confirmed unable to capture ac3/dts bitstreams due to muting NON_AUDIO content:
    ESI U24 XL 24-Bit USB Audio Interface for PC/Mac
    M-Audio Audiophile USB
    Last edited by bani6809; 13th Jan 2019 at 22:32.
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