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Thread: Surprisingly high outgoing bandwidth from Mezzmo

  1. #1
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    Mar 2013
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    Default Surprisingly high outgoing bandwidth from Mezzmo

    I just happened to peek at our media server, running Mezzmo 5.0.5.0 under Windows 7 Pro x64, by remote desktop while my housemate was watching a movie on her PS3. Iím puzzled by something. I was looking at Windows Resource Monitor. Nothing was running but Mezzmo, my remote desktop connection and default Windows processes, and the only connection to Mezzmo was the PS3. I have transcoding turned off, and the file is stored on a disk drive within the server.

    The file she was watching has a total bitrate of just under 10Mbps. (FFprobe says ďbitrate: 9871 kb/s.Ē) The size of the file divided by its length is consistent with this. The disk activity shown by Resource Monitor was also consistent with that bitrate, ranging from 0-3 MB/sec and, by eye, averaging a little more than 1 MB/sec.

    The Network Utilization, though, was showing 80-87 Mbps at all times, nearly all of it sending to the PS3 from MezzmoMediaServer.exe.

    Does this make sense? Why is Mezzmoís outgoing bandwidth over 8 times the fileís bitrate?

    Our home network can handle this (itís limited by our MoCA transceivers, which I think can handle around 200Mbps), and the PS3 doesnít seem to be choking (yet), so I have no immediate problem... but this seems like it could indicate something wrong.

  2. #2
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    Seems very strange. When transcoding is turned off, Mezzmo is simply streaming the file to your PS3. The only clue from your description is the 8 times difference - so possibly bytes/sec vs. bits/sec?
    Last edited by Paul; 06-26-2016 at 03:18 PM.

    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
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  3. #3
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    Quote Originally Posted by Paul View Post
    Seems very strange. When transcoding is turned off, Mezzmo is simply streaming the file to your PS3. The only clue from your description is the 8 times difference - so possibly bytes/sec v.s bits/sec?
    Iím sure it is not a bits/bytes error. I tripled-checked for that mistake. The Network Utilization is around 85Mbpsóif that were bytes, it would be eight times more odd. The file data rate is definitely just under 10 megabits per second, not megabytes per second. (The file is 6.64 GB and 1:36:19.)

    She has finished the movie now, so the numbers are no longer in front of me, and it would be unwise to disturb her now to retry it. I will try to determine if the strange numbers occur consistently, and if they are unique to the PS3. (Itís normally the only thing we use to watch video stored on Mezzmo, but I can try streaming to a web browser and to my HTC M8.)

  4. #4
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    OK - do let us know what you find out. We'll certainly look into it if you can establish it is actually happening.

    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
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    I checked this out with a different file: a movie with a reported bitrate of 10063 kb/s (around 1,290,000 Bytes/sec). I streamed it to the Mezzmo app on my HTC M8 and to the PS3, from both Mezzmo 4.1.3.0 running under Windows XP 32-bit and Mezzmo 5.0.5.0 running under Windows 7 64-bit.

    I've placed some screen shots of the monitoring results at http://bisonica.pairserver.com/mezzmo/mezperf/.

    Here is the information for the file, from Mezzmo 5.0.5.0:

    Code:
    ffmpeg version N-78742-gf477849 Copyright (c) 2000-2016 the FFmpeg developers
      built with gcc 4.9.2 (GCC)
      configuration: --enable-memalign-hack --arch=x86_64 --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32- --enable-static --disable-shared --enable-zlib --disable-postproc --prefix=/home/peter/ffmpeg/build/gpl64 --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread -lstdc++' --enable-runtime-cpudetect --extra-cflags=-I/home/peter/cc32/include --extra-ldflags=-L/home/peter/cc64/lib --pkg-config=pkg-config --pkg-config-flags=--static --disable-w32threads --enable-libvpx --enable-libvorbis --enable-libtheora --enable-libx265 --enable-libmfx --enable-gnutls --extra-libs='-lz -lnettle -lhogweed -lgmp -lidn -lws2_32 -lcrypt32'
      libavutil      55. 19.100 / 55. 19.100
      libavcodec     57. 25.101 / 57. 25.101
      libavformat    57. 26.100 / 57. 26.100
      libavdevice    57.  0.101 / 57.  0.101
      libavfilter     6. 36.100 /  6. 36.100
      libswscale      4.  0.100 /  4.  0.100
      libswresample   2.  0.101 /  2.  0.101
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000560520] stream 0, timescale not set
    [mjpeg @ 0000000000562740] Changing bps to 8
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000560520] Stream #2: not enough frames to estimate rate; consider increasing probesize
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '\\Peacock\Movies\babadook  the  (2014).mp4':
      Metadata:
        major_brand     : isom
        minor_version   : 1
        compatible_brands: isomavc1
        creation_time   : 2015-02-25 09:44:00
        date            : 2014-01-17
        title           : The Babadook
      Duration: 01:33:46.08, start: 0.000000, bitrate: 10063 kb/s
        Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x816, 9841 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
        Metadata:
          creation_time   : 2015-02-25 09:44:00
          handler_name    : baba3.264 - Imported with GPAC 0.5.0-rev4065
        Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 212 kb/s (default)
        Metadata:
          creation_time   : 2015-02-25 09:44:59
          handler_name    : GPAC ISO Audio Handler
        Stream #0:2: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 4000x3000, 90k tbr, 90k tbn, 90k tbc
    At least one output file must be specified
    
    <MEZZMO>: Child process ended with code: 109, ExitCode=1
    
    
    ---> DB Level Info: 41, 100
    ---> Frame rate: 23.98
    ---> Aspect ratio: 
    ---> Duration: 01:33:46
    Here is what I find odd. In all cases, the rate at which the disk is being read is consistent with the bit rate of the file. With the Mezzmo app on the HTC M8, the data send rates are also consistent. With the PS3, 5-6 times as much data is being sent as is being read. This is true for both Mezzmo 4.1.3.0 and Mezzmo 5.0.5.0.

    I realize there could be caching going on... but I canít come up with a scenario that explains why the machine would be reading data from the file at approximately the real-time rate of the file, but sending data at five times that rate.

  6. #6
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    Thanks for the great analysis. My only thought is that the PS3 is requesting data using multiple sockets (i.e. making multiple requests). Mezzmo server simply delivers whatever is asked. And when transcoding is turned off, no changes to original file are made, so unless there are multiple requests, there can be no reason that I can think of for more data than the original file being sent. We'll try it here with our PS3 and see if we can replicate your situation.

    BTW: the http://Peacock:53168/web/login?user=guest issue that you reported was also fixed in v5.0.5.0 release. Let us know if it works for you now.

    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
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    Quote Originally Posted by Paul View Post
    Thanks for the great analysis. My only thought is that the PS3 is requesting data using multiple sockets (i.e. making multiple requests). Mezzmo server simply delivers whatever is asked. And when transcoding is turned off, no changes to original file are made, so unless there are multiple requests, there can be no reason that I can think of for more data than the original file being sent. We'll try it here with our PS3 and see if we can replicate your situation.
    Thanks for looking into it. Iím no expert on reading those activity statistics, so it could be nothingóand itís not causing a problem right nowóbut it sure seems odd. I canít figure out how Mezzmo can be sending more data than itís reading. If it had cached the file already, before I got down to look at the monitoring windows, sure... but then, why is it reading the file at all... and, suspiciously, at approximately the real time data rate? And why for the PS3 but not for the Mezzmo app on the HTC One M8?

    Quote Originally Posted by Paul View Post
    BTW: the http://Peacock:53168/web/login?user=guest issue that you reported was also fixed in v5.0.5.0 release. Let us know if it works for you now.
    Yes, it works as expected now. Thank you!

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