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Thread: Audio lag streaming to Samsung HT system

  1. #1
    Join Date
    Jan 2012
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    4

    Default Audio lag streaming to Samsung HT system

    Hi,

    I'm using a trial version of Mezzmo to stream media from my Windows 7 x64 PC to the TV via a Samsung HT-D5530. The content is streaming over a wireless G network and the samsung device has full signal.

    I've noticed when streaming a variety of videos that sound will gradually lose sync with the picture (by as much as 1/3rd of a second I'd guess) and then gradually return to sync throughout the duration of the video. The sound is synced properly if I play the file on the computer. I don't think it's a network speed problem because the picture never skips or jitters, and even if I use the time search feature to skip ahead by half an hour, playback will resume promptly and with out lag.

    Any ideas?

    Great job with the program by the way, getting it working with my Samsung player was FAR easier than with tversity (and better than the default Windows 7 streaming which didn't work at all)

    Thanks in advance.

  2. #2
    Join Date
    Nov 2007
    Location
    Melbourne, Australia
    Posts
    11,646

    Default

    Do you know if those files are streamed natively or transcoded? Can you please right-click on one such file in Mezzmo and post the output of the "Get FFmpeg Information" command and also the device profile you are using?

    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
    Jan 2012
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    4

    Default

    Hi Dennis,

    The files are being streamed natively. I'm using the Samsung HTS profile as it seemed the best fit. ffmpeg output is below. I should also mention (having experimented a bit more) that some videos seem to be consistently in sync the whole way through, whereas some seem to be consistently out of sync the whole way through. The output I've posted below is from a video that goes in and out of sync gradually. All videos are in sync when played on the PC.

    Thanks for your help.

    Code:
    ffmpeg version N-36036-ga40f43d, Copyright (c) 2000-2011 the FFmpeg developers
      built on Dec 22 2011 13:44:49 with gcc 4.6.2
      configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32- --enable-static --disable-shared --enable-zlib --disable-postproc --prefix=/media/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --extra-cflags=-I/home/dennis/cc/include --extra-ldflags=-L/home/dennis/cc/lib --pkg-config=pkg-config --disable-w32threads
      libavutil    51. 32. 0 / 51. 32. 0
      libavcodec   53. 46. 1 / 53. 46. 1
      libavformat  53. 27. 0 / 53. 27. 0
      libavdevice  53.  4. 0 / 53.  4. 0
      libavfilter   2. 53. 0 /  2. 53. 0
      libswscale    2.  1. 0 /  2.  1. 0
    Input #0, avi, from 'C:\Users\username\Videos\videofile.avi':
      Metadata:
        encoder         : Some super fast AVI muxer 
      Duration: 00:57:09.57, start: 0.000000, bitrate: 1342 kb/s
        Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 624x352 [SAR 1:1 DAR 39:22], 23.98 tbr, 23.98 tbn, 23.98 tbc
        Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16, 96 kb/s
    At least one output file must be specified
    
    
    ---> DB Level Info: 5, 15
    ---> Frame rate: 23.98
    ---> Aspect ratio: 39:22

  4. #4
    Join Date
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    If the file is being passed through natively, then it's likely that there's something about the encoding of that file which makes the audio go out of sync. Hardware-based players are quite limited in what they support, so the file may play fine on your PC, but the firmware on the device may not be able to handle it.

    Please try the pre-transcoding feature to force-transcode one such file and see if that solves the issue.

    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
    Jan 2012
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    Hi Dennis,

    I tried pre-transcoding one of my files using the "pre-transcode files even if they match the device's supported formats" option. After playing the file, the audio is still out of sync. The pre-transcoded file does play in sync on my PC.

  6. #6
    Join Date
    Nov 2007
    Location
    Melbourne, Australia
    Posts
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    Default

    Please open a support ticket and I'll send you an updated device profile to try.

    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

  7. #7
    Join Date
    Jan 2012
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    Just a quick update for anyone who might be having a similar problem - the new profile which Dennis mentioned has seemed to fix the audio sync problem without needing to pre-transcode the files. Thanks for your help!

  8. #8
    Join Date
    Nov 2007
    Location
    Melbourne, Australia
    Posts
    11,646

    Default

    I'm glad the updated profile works!

    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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