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Thread: Mplayer stutters; totem works

  1. #1
    Join Date
    Jul 2007

    Mplayer stutters; totem works

    I like mplayer. I don't particularly like Totem. However, mplayer stutters when playing certain avi files. It plays fine for periods of time ranging from a few seconds to a few minutes, and then both the video and the audio pause for about a second; the video continues, and the audio makes an abnormally loud noise, as though the sound it missed playing is trying to catch up. This is coupled with synchronization problems. I've tried -autosync 30 all the way up to -autosync 200, but it doesn't solve the problem. I don't know what values of -autosync should be, so I stopped there. Totem plays these (well, I only tested with one; I'll look at others later) without any problem.

    The file info as per MediaInfo:

    Format : AVI
    Format/Info : Audio Video Interleave
    Format/Family : RIFF
    File size : 350 MiB
    PlayTime : 51mn 35s
    Bit rate : 949 Kbps
    StreamSize/String : 4.71 MiB
    Writing application : VirtualDub

    Video #0
    Codec : XviD
    Codec/Family : MPEG-4V
    Codec/Info : XviD project
    Codec profile : Simple Profile/Level 3
    Codec settings, Packet bitst : Yes
    Codec settings, BVOP : Yes
    Codec settings, QPel : No
    Codec settings, GMC : 0
    Codec settings, Matrix : Default
    PlayTime : 51mn 35s
    Bit rate : 813 Kbps
    Width : 624 pixels
    Height : 352 pixels
    Display Aspect ratio : 16/9
    Frame rate : 23.976 fps
    Resolution : 8 bits
    Chroma : 4:2:0
    Interlacement : Progressive
    Bits/(Pixel*Frame) : 0.154
    StreamSize/String : 300 MiB
    Writing library : XviD 1.1.0Beta1
    Writing library/Date : UTC 2005-01-16

    Audio #0
    Codec : MPEG-1 Audio layer 3
    Codec profile : Joint stereo
    PlayTime : 51mn 35s
    Bit rate mode : VBR
    Bit rate : 124 Kbps
    Minimum bit rate : 128 Kbps
    Channel(s) : 2 channels
    Sampling rate : 48.0 KHz
    Resolution : 16 bits
    StreamSize/String : 45.6 MiB
    Writing library : LAME3.98a
    Encoding settings : ABR

    I think that the VBR audio may be significant.

    My system info: I'm running Gutsy on a Dell 1420 (1420n?).

  2. #2
    Join Date
    Aug 2007

    Re: Mplayer stutters; totem works

    I played with a pinnacle mp4 encoder, and I remember seeing symptoms like yours right after I cut out the commercials. I think mplayer is tripping on choppy data. I would either get mplayer to rebuild the index, or simply re-encode (just the audio) with ffmpeg or mencoder.

    gmplayer -forceidx movie.mpg

  3. #3
    Join Date
    Jul 2007

    Re: Mplayer stutters; totem works

    -forceidx doesn't fix it. How would one go about re-encoding just the audio?

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