Plex app transcodes too much

Discussion in 'TiVo Home Media Features & TiVoToGo' started by moyekj, Jun 9, 2015.

  1. moyekj

    moyekj Well-Known Member

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    Not too surprising I suppose, but any video with AC-3 gets transcoded. So titles that could stream without any changes (H.264 + AC3 or mpeg2 + AC3), get transcoded. From what I recall the TiVo Opera browser supports very narrow range of codecs so pretty much everything I have gets transcoded when using the Plex app. Haven't looked in detail at the transcode arguments to see if it does a remux when applicable, but I would guess it's doing a full transcode even when video codec is compatible.
    On the plus side, the transcode quality looks pretty good at least.
     
  2. JerryB01

    JerryB01 Member TCF Club

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    You need to go into the Plex settings under your user account (upper right corner of the screen) and check the box to enable AC3 if you don't want AC3 audio to be transcoded.
     
  3. jcthorne

    jcthorne Well-Known Member

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    Yes, changing the setting in the plex app to allow ac3 will get the audio fixed up but the app is still limited to 4Mbps 720p, H.264 Level 4.1 as a max. Any video above those settings will transcode for now.

    Really glad to see you scoping plex out. It seems like a nice first attempt but does need some features added.
     
  4. moyekj

    moyekj Well-Known Member

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    The only thing related to that I see is:
    Settings--Web--Show Advanced
    Allow Direct Play of AC3 Audio

    But I thought all "Web" settings were for the web player only and don't affect the server side?

    I guess we need to compile some statistics on what video + audio codecs play natively. I guess I'll get it started:

    CONTAINERS: mp4
    VIDEO CODECS: H.264 level 4.1 or lower
    AUDIO CODECS: AAC (2 channels) or AC3 (up to 6 channels)
    RESOLUTION LIMIT: 720p
    BIT RATE LIMIT: 4 Mbps

    I still have a lot of mpeg2 video which I suppose will always get transcoded via this app. Given the above limitations so far it means everything I have will get transcoded.

    If you do happen to have compatible video for everything except container, does it simply remux or will it still fully transcode?
     
    Last edited: Jun 9, 2015
  5. JerryB01

    JerryB01 Member TCF Club

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    I agree. It's a nice first attempt but the app needs work before I would use it on a regular basis. I already have multiply devices than can play the items on my plex server in full native resolution on my TV. I only need/want these files to be transcoded to a lower resolution when I'm away from my home network and streaming the files to my phone.
     
  6. JerryB01

    JerryB01 Member TCF Club

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    Here's how I access the setting you need:

    1) Load Tivo Plex app
    2) Select your account/user name in the upper right corner
    3) Select Settings
    4) Select Audio
    5) Select AC3 to put a checkmark in the AC3 box.
     
  7. jcthorne

    jcthorne Well-Known Member

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    2 channel AAC only, AC3 supports 5.1
     
  8. moyekj

    moyekj Well-Known Member

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    OK thanks. That makes more sense.
     

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