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Thread: 4k downgraded to FHD on SONY KD-55A8F

  1. #1
    Join Date
    Dec 2018
    Posts
    2

    Default 4k downgraded to FHD on SONY KD-55A8F

    Hi,

    I just bought a SONY KD-55A8F and wanted to play a 4k movie with MEZZMO.

    MEZZMO needed to transcode but the outcome was note at all in 4k. I looked at the FFmpeg reports and noted that the 4k resolution was downgraded after the transcoding :

    Original file :

    Stream #0:0(eng): Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x1608 [SAR 1:1 DAR 160:67], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)

    Transcoded file :

    Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1920x804 [SAR 1:1 DAR 160:67], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc

    I tried to put the resolution at the maximum in the device parameters but it did not change anything.

    I also noted that the most sony updated version is the "2015 model": I don't see any updated version (a 4k ? high resolution ?), is it normal ?

    Thanks to find the log in attachment. Thanks in advance for your support !
    Attached Images Attached Images
    Attached Files Attached Files

  2. #2
    Join Date
    Sep 2009
    Posts
    1,774

    Default

    The max resolution is set in the mpeg container when transcoding so the maximum resolution set in Device Settings is not used. You should use the Conceiva Mezzmo (Android) profile for the TV since it uses Android TV and then you will be able to set the maximum resolution in Device Settings to 4K.

    Mezzmo Android: Install it on your tablet, smartphone, Android TV or Amazon Fire to browse and stream files from your Mezzmo library to all your devices. Full details at http://www.conceiva.com/products/mez...mo_android.asp
    Mezzmo for Kodi Add-on: Install it into Kodi to stream files from your Mezzmo library directly in Kodi. Full details at http://www.mezzmo.com/wiki/doku.php?...odi_user_guide
    Mezzmo for Roku App: Install it onto your Roku to stream files from your Mezzmo library. Full details at http://www.mezzmo.com/wiki/doku.php?...oku_user_guide
    Wiki: User Guides & Reference Manual at http://www.mezzmo.com/wiki
    Facebook: http://www.facebook.com/Mezzmo.DLNA.Server
    Twitter: https://twitter.com/conceiva_mezzmo
    Web: http://www.mezzmo.com

  3. #3
    Join Date
    Dec 2018
    Posts
    2

    Default

    Thanks for your reply.

    I have chosen the Conceiva (android) profile. Can you please confirm that my device parameters (screen 1) and pre-transcode formats (screen 2) are well selected to have a 4k transcoding ?

    Thanks !
    Attached Images Attached Images

  4. #4
    Join Date
    Sep 2009
    Posts
    1,774

    Default

    Yes, this looks fine for 4k transcoding but transcoding may not be required depending upon which app you use on the TV. The Mezzmo app supports many formats and codecs without transcoding so you can try this to see if the 4k video works correctly.

    Mezzmo Android: Install it on your tablet, smartphone, Android TV or Amazon Fire to browse and stream files from your Mezzmo library to all your devices. Full details at http://www.conceiva.com/products/mez...mo_android.asp
    Mezzmo for Kodi Add-on: Install it into Kodi to stream files from your Mezzmo library directly in Kodi. Full details at http://www.mezzmo.com/wiki/doku.php?...odi_user_guide
    Mezzmo for Roku App: Install it onto your Roku to stream files from your Mezzmo library. Full details at http://www.mezzmo.com/wiki/doku.php?...oku_user_guide
    Wiki: User Guides & Reference Manual at http://www.mezzmo.com/wiki
    Facebook: http://www.facebook.com/Mezzmo.DLNA.Server
    Twitter: https://twitter.com/conceiva_mezzmo
    Web: http://www.mezzmo.com

  5. #5
    Join Date
    Feb 2017
    Location
    Rosevears, Tasmania.
    Posts
    43

    Default

    Peter,

    What about the Bitrate Maximum set to 750kbps. Is that enough for 4K?
    Cheers,
    Marty Davey.

  6. #6
    Join Date
    Sep 2009
    Posts
    1,774

    Default

    750kbps is quite low and may result in blocky pixelated video, you should increase this to at least 1.5Mbps

    Mezzmo Android: Install it on your tablet, smartphone, Android TV or Amazon Fire to browse and stream files from your Mezzmo library to all your devices. Full details at http://www.conceiva.com/products/mez...mo_android.asp
    Mezzmo for Kodi Add-on: Install it into Kodi to stream files from your Mezzmo library directly in Kodi. Full details at http://www.mezzmo.com/wiki/doku.php?...odi_user_guide
    Mezzmo for Roku App: Install it onto your Roku to stream files from your Mezzmo library. Full details at http://www.mezzmo.com/wiki/doku.php?...oku_user_guide
    Wiki: User Guides & Reference Manual at http://www.mezzmo.com/wiki
    Facebook: http://www.facebook.com/Mezzmo.DLNA.Server
    Twitter: https://twitter.com/conceiva_mezzmo
    Web: http://www.mezzmo.com

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