Lag during 720p playback

Discussion in 'Mac Basics and Help' started by npriess, Mar 7, 2009.

  1. npriess macrumors regular

    Joined:
    Nov 12, 2008
    Location:
    Denmark
    #1
    Hi,

    When I play back a video from my freeagent go portable drive, I experience a slight lag every 5-10 seconds.

    Is there something to do about it? :confused:
     
  2. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
    #2
    Copy it to an internal drive. Your external is not fast enough to accommodate the bitrate of high-resolution video.

    You could also try playing with Plex. I've found that it has fewer problems with lag on high-bitrate videos than other players.
     
  3. npriess thread starter macrumors regular

    Joined:
    Nov 12, 2008
    Location:
    Denmark
    #3
    I just don't get it - because transfer rates exceed 30 mb/sec from my external drive.
    Shouldn't that be enough for a smooth video playback?
     
  4. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
    #4
    I have the same problem with HD video. I don't know why it behaves like that, but Plex does work.
     
  5. npriess thread starter macrumors regular

    Joined:
    Nov 12, 2008
    Location:
    Denmark
    #5
    Okay - thanks for the advice :) I'll try Plex.

    What are the specs of your setup? computer, drive and interface
     
  6. Cave Man macrumors 604

    Cave Man

    #6
    It has nothing to do with the external drive. It has everything to do with the playback software. My Blu-ray drive is USB, which is substantially slower than any USB hard drive.
     
  7. npriess thread starter macrumors regular

    Joined:
    Nov 12, 2008
    Location:
    Denmark
    #7
    So the conclusion is;

    1. VLC sucks at playing HD video from an external drive?
    2. No matter how fast a drive I would connect - I would still have the same issue?
     
  8. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
    #8
    I don't know about that. I also have a FreeAgent Go drive, as well as a 3.5" USB external, and both have lag problems with QuickTime and VLC. Both players work fine from with video copied to my internal drive.

    That being the case, I imagine eSATA would work just fine.

    The speed of the drive has nothing to do with it. External hard drives are the same drives that are used in computers, just placed in an external enclosure. The bottleneck is the USB interface.
     
  9. npriess thread starter macrumors regular

    Joined:
    Nov 12, 2008
    Location:
    Denmark
    #9
    I know the drives are similar to those in the computer - but what I meant was another interface. Choosing a firewire 800 drive for instance? :)
     
  10. Cave Man macrumors 604

    Cave Man

    #10
    Not necessarily. There are too many variables to know where the difficulty lies, such as bit rate, video codec, audio codec and frame rate. But generally speaking, only Plex and XBMC are efficient play back apps for HD video.

    I can play Blu-ray rips off of a USB2 hard drive with Plex. These are typically 1080p, 30 mbps bit rate, 24 fps and have digital audio (AC3, DTS), and I'm using a 2 gHz Mac Mini/gma950.
     
  11. npriess thread starter macrumors regular

    Joined:
    Nov 12, 2008
    Location:
    Denmark
    #11
    Tried Plex now and it actually seems to work flawlessly. Thanks. :)
     

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