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  1. Hello everybody

    I have a question concerning the playback of MKV files on my HT-E5550 Blu Ray player. When watching some mkv's I have issues with audio synchronization, namely that the playback is out of sync right from the start (sometimes getting progressively worse). I watch the files via a USB stick directly inserted into the Blu Ray player. When I use the same USB stick and plug it into the TV itself (also a Samsung), the playback is perfect.


    Moreover, I also see this issue only coming up with some mkv's and not with others. I used MediaInfo to get some more information about the files and here is the two files (see for the output underneath). The main difference I see is that one file has AC-3 Audio with 2 channels and the other one AC-3 with 6 channels. Unfortunately, I am new to all of this and I was wondering whether anybody could give me some advice on what the issue might be and how to solve it. Thank you very much for your help!


    Output MediaInfo:


    File 1 (which has the audio issues):
    Format : Matroska
    Format version : Version 4 / Version 2
    File size : 1.13 GiB
    Duration : 1h 0mn
    Overall bit rate : 2 696 Kbps
    Encoded date : UTC 2013-09-09 03:41:42
    Writing application : mkvmerge v6.0.0 ('Coming Up For Air') built on Jan 20 2013 10:28:01
    Writing library : libebml v1.3.0 + libmatroska v1.4.0


    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High@L4.1
    Format settings, CABAC : Yes
    Format settings, ReFrames : 5 frames
    Codec ID : V_MPEG4/ISO/AVC
    Duration : 1h 0mn
    Bit rate : 2 258 Kbps
    Width : 1 280 pixels
    Height : 720 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Constant
    Frame rate : 23.976 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.102
    Stream size : 972 MiB (84%)
    Writing library : x264 core 138 r2358 9e941d1
    Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=18 / lookahead_threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
    Language : English
    Default : Yes
    Forced : No
    Matrix coefficients : BT.709


    Audio
    ID : 2
    Format : AC-3
    Format/Info : Audio Coding 3
    Mode extension : CM (complete main)
    Format settings, Endianness : Big
    Codec ID : A_AC3
    Duration : 1h 0mn
    Bit rate mode : Constant
    Bit rate : 384 Kbps
    Channel(s) : 2 channels
    Channel positions : Front: L R
    Sampling rate : 48.0 KHz
    Bit depth : 16 bits
    Compression mode : Lossy
    Stream size : 165 MiB (14%)
    Default : Yes
    Forced : No





    File 2 (without the issues):
    Format : Matroska
    Format version : Version 2
    File size : 1.27 GiB
    Duration : 45mn 58s
    Overall bit rate : 3 970 Kbps
    Writing application : x264.exe
    Writing library : mkv2rls x264-tv version built on 2011. febr. 17


    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High@L4.1
    Format settings, CABAC : Yes
    Format settings, ReFrames : 5 frames
    Codec ID : V_MPEG4/ISO/AVC
    Duration : 45mn 58s
    Bit rate : 3 507 Kbps
    Width : 1 278 pixels
    Height : 720 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Constant
    Frame rate : 23.976 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.159
    Stream size : 1.13 GiB (88%)
    Writing library : x264 core 138 r2358 9e941d1
    Encoding settings : cabac=1 / ref=5 / deblock=1:-2:-2 / analyse=0x3:0x113 / me=umh / subme=8 / psy=1 / psy_rd=1.05:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=18 / lookahead_threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.10
    Language : English
    Default : Yes
    Forced : No


    Audio
    ID : 2
    Format : AC-3
    Format/Info : Audio Coding 3
    Mode extension : CM (complete main)
    Format settings, Endianness : Big
    Codec ID : A_AC3
    Duration : 45mn 58s
    Bit rate mode : Constant
    Bit rate : 384 Kbps
    Channel(s) : 6 channels
    Channel positions : Front: L C R, Side: L R, LFE
    Sampling rate : 48.0 KHz
    Bit depth : 16 bits
    Compression mode : Lossy
    Stream size : 126 MiB (10%)
    Language : English
    Default : Yes
    Forced : No
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  2. Member Krispy Kritter's Avatar
    Join Date
    Jul 2003
    Location
    St Louis, MO USA
    Search Comp PM
    Assuming the files play correctly on another device, it's typically a byproduct of the files exceeding the specs of the player.

    If you can find the supported file specs for the player, compare the files to what is supported. Things to watch are the supported codecs (both video and audio), resolution, and bitrate (both audio and video).
    Google is your Friend
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  3. Thank you for the reply. I checked for the specifications and as far as I can see, none of the files exceeds the recommended specifications of the device. Even more so, the second file which is playing just fine, has an even higher bitrate than the first one. I really don't understand what the issue is. I was wondering, could it have anything to do with the USB stick and maybe I should use a different playback device? Then again, if that would be the issue, it should occur when playing over the TV or the Blu Ray player.

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