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Hi, So as some of you know mplayer often has issues with playing dvds and the presumed fixes don't work for everyone. I rented a dvd and would like to ...
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  1. #1
    Just Joined!
    Join Date
    Aug 2008
    Posts
    3

    mplayer a52 CRC check issues


    Hi,

    So as some of you know mplayer often has issues with playing dvds and the presumed fixes don't work for everyone. I rented a dvd and would like to watch it on my computer but these errors won't let me.
    Code:
    anthony@civ:~$ mplayer dvd://1
    MPlayer 1.0rc2-4.3.1-DFSG-free (C) 2000-2007 MPlayer Team
    CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ (Family: 15, Model: 35, Stepping: 2)
    CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
    Compiled with runtime CPU detection.
    mplayer: could not connect to socket
    mplayer: No such file or directory
    Failed to open LIRC support. You will not be able to use your remote control.
    
    Playing dvd://1.
    There are 8 titles on this DVD.
    There are 2 chapters in this DVD title.
    There are 1 angles in this DVD title.
    audio stream: 0 format: ac3 (stereo) language: en aid: 128.
    number of audio channels on disk: 1.
    subtitle ( sid ): 1 language: en
    subtitle ( sid ): 3 language: es
    number of subtitles on disk: 2
    MPEG-PS file format detected.
    VIDEO:  MPEG2  720x480  (aspect 3)  29.970 fps  9800.0 kbps (1225.0 kbyte/s)
    ==========================================================================
    Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
    VDec: vo config request - 720 x 480 (preferred colorspace: Mpeg PES)
    Could not find matching colorspace - retrying with -vf scale...
    Opening video filter: [scale]
    The selected video_out device is incompatible with this codec.
    Try appending the scale filter to your filter list,
    e.g. -vf spp,scale instead of -vf spp.
    VDecoder init failed :(
    Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
    Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2))
    ==========================================================================
    ==========================================================================
    Opening audio decoder: [liba52] AC3 decoding with liba52
    Using SSE optimized IMDCT transform
    Using MMX optimized resampler
    AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
    Selected audio codec: [a52] afm: liba52 (AC3-liba52)
    ==========================================================================
    AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
    Starting playback...
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!
    VDec: vo config request - 720 x 480 (preferred colorspace: Planar YV12)
    VDec: using Planar YV12 as output csp (no 0)
    Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
    VO: [xv] 720x480 => 854x480 Planar YV12
    a52: CRC check failed!  6.446 ct:  0.010   4/  4 ??% ??% ??,?% 0 0
    a52: error at resampling
    a52: CRC check failed!  7.068 ct:  0.037  12/ 12 ??% ??% ??,?% 6 0
    a52: CRC check failed!  8.380 ct:  0.040  13/ 13 ??% ??% ??,?% 7 0
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!  5.449 ct:  0.043  14/ 14 ??% ??% ??,?% 8 0
    a52: error at resampling
    a52: CRC check failed!
    
    Too many video packets in the buffer: (4096 in 8248751 bytes).
    Maybe you are playing a non-interleaved stream/file or the codec failed?
    For AVI files, try to force non-interleaved mode with the -ni option.
    a52: CRC check failed!
    a52: error at resampling

    I have tried a few things in the past such as
    sudo hdparm -d1 -k1 /dev/hda with no luck.



    Anybody have ideas that will help me?

    Usually the dvds I rent from the video store are the issue. I have a percussion dvd that will work with mplayer so mabye drm issues?


    thanks

  2. #2
    Just Joined!
    Join Date
    Nov 2008
    Posts
    1
    Sorry for taking three months, but I just trolled by. I have an idea, so I joined the forum. :')

    I had this problem and playing the DVD with the command:
    mplayer dvdnav://
    solved it for me. Give it a try. (gmplayer dvdnav:// also works)

    I believe this is, as you say, a "DRM" issue. I suspect that the DVD contains unreferenced audio packets that intentionally have bad checksums. By following the navigation in the DVD VM, you navigate "around" the potholes.

    If you're still monitoring this, tell me if this works for you.

    Rich

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