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Thread: Why is Mezzmo transcoding files it doesn't need to transcode?

  1. #1
    Join Date
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    Default Why is Mezzmo transcoding files it doesn't need to transcode?

    I'm very new to the whole DLNA scene after finally ditching my old CRT telly and getting a Samsung LE40C650.

    Anyway I thought I'd look at Mezzmo as a DLNA server as I've heard good things.

    I have found that when trying to play standard mpeg2 video files from ripped DVDs (i.e. mpeg2 streams taken straight from DVD VOB files) Mezzmo is transcoding these files before sending them to the Samsung TV.

    Now if I disable transcoding within Mezzmo and again choose that file from the TV, Mezzmo then sends that file natively where it is perfectly playable using the codecs of the DLNA client.

    Why then is Mezzmo transcoding this file? Is this just a profile issue in Mezzmo that doesn't understand the capabilities of the DLNA client on the TV (it correctly shows the device as "Samsung C") or something else?

    How does one know what formats a DLNA client is capable of receiving? Does the DLNA spec allow the client to announce what file formats it can decode/play?

  2. #2
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    Jan 2011
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    I'll answer my own question - it was a problem with the Samsung C profile. After editing the profile and adding an additional setting for one of the mpeg audio streams it seems that Mezzmo is now not performing any transcoding for the problematic mpeg2 files.

  3. #3
    Join Date
    Nov 2007
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    Great! Can you please tell me what you've added, so that I could add it to the stock profile as well?

    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

  4. #4
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    Yes, please post. I have the same issue using the DirecTv profile. I have mpeg2video w/ M mp2 audio that don't need transcoding yet Mezzmo transcodes them. Curious too if the framerate has to match. My files are 25fps which plays fine on the HR23-700, however the device profile has 29.97fps. Any doc reference on how to modify prf files would be helpful.

  5. #5
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    Can you please post FFmpeg information on that mpeg2 file?

    There're no official docs on how to modify prfs, but feel free to ask any questions here

    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

  6. #6
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    Default

    Apparently I misinterpreted the Mezzmo action. It was transcoding other files that I thought were the mpeg2video files. My bad...

  7. #7
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    Quote Originally Posted by Dennis View Post
    Great! Can you please tell me what you've added, so that I could add it to the stock profile as well?
    Under the mpeg_ntsc container in the ac3 audio container I added a further channels entry for only 1 channel. The Samsung codec can handle mono audio streams and so these should be passed directly without transcoding. Many of my Criterion Collection DVDs have mono AC3 audio streams.

  8. #8
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    Thanks - we'll adjust the profile here.

    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

  9. #9
    Join Date
    Apr 2011
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    I too am having an issue with my PS3 on a file that's being transcoded that doesn't need to. The file works just fine with windows media player streaming, but not mezzmo, after 3min of playback on the PS3 the first transcoded file would just die out (unless i fast forward past that point) the second transcoded file looks like it goes into fast forward and plays only static. This is a movie we watch all the time. I am still within the 15 day trial of the product but I am very much liking it and will probably buy it because it can transcode on the fly and ease of use. An option I think you should added in the properties of the movie files an option to individually disable transcodeing file by file. Hopefully all the info you need is below. Thank you for your time.

    -Larry Jr.

    The PS3 is the new 320GB Slim

    FFmpeg info is:

    FFmpeg version git-N-28463-gc5dcb3d, Copyright (c) 2000-2011 the FFmpeg developers
    built on Apr 11 2011 15:09:07 with gcc 4.4.2
    configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-mingw32- --enable-static --disable-shared --enable-zlib --disable-ffprobe --disable-ffplay --prefix=/media/windows/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --pkg-config=pkg-config
    libavutil 50. 40. 1 / 50. 40. 1
    libavcodec 52.117. 1 / 52.117. 1
    libavformat 52.106. 0 / 52.106. 0
    libavdevice 52. 4. 0 / 52. 4. 0
    libavfilter 1. 78. 0 / 1. 78. 0
    libswscale 0. 13. 0 / 0. 13. 0
    [mpeg4 @ 02d90540] Invalid and inefficient vfw-avi packed B frames detected

    Seems stream 0 codec frame rate differs from container frame rate: 23.98 (65534/2733) -> 23.98 (2997/125)
    Input #0, avi, from 'D:\Movies\cartoon\How to Train Your Dragon[2010]DvDrip[Eng]-FXG.avi':
    Metadata:
    encoder : VirtualDubMod 1.5.10.2 (build 2540/release)
    Duration: 01:37:51.53, start: 0.000000, bitrate: 998 kb/s
    Stream #0.0: Video: mpeg4, yuv420p, 696x288 [PAR 1:1 DAR 29:12], 23.98 tbr, 23.98 tbn, 23.98 tbc
    Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 128 kb/s
    At least one output file must be specified


    ---> DB Level Info: -99

  10. #10
    Join Date
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    We found that the PS3 is a bit picky about DivX/Xvid files and thus such files are transcoded by default.

    If your files play properly, then you can adjust the device profile not transcode them. To do that:

    1) stop your server
    2) open up SonyPlaystation3.prf in Notepad (see this thread for its location: http://forum.conceiva.com/showthread...ofiles-located) - you may need to remove the read-only flag from it prior to that
    3) find this comment: "<!-- Remove these comments to enable Native DivX"
    4) delete that line and the next "-->"
    5) save the file, restart the server and try again

    Let me know how that goes.

    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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