no sound playing avi file on quicktime X

Discussion in 'MacBook Air' started by kazeth, Apr 20, 2013.

  1. kazeth macrumors newbie

    Apr 20, 2013
    hey guys, trying to play an avi file on my new macbook air 11" and having problems. theres no sound. the audio stream of the file is apparently AC3 5.1 48000hz, but the ac3 codecs i've tried don't work.. help please??
  2. simsaladimbamba

    Nov 28, 2010
    QT X is not recommended for AVI format/file playback, to play .avi files (most often using the Divx or Xvid codec) in Mac OS X you can use the following applications:
    • QuickTime Player, but you need Perian installed
    • VLC Player, which plays more than just .avi files, as it can also play .mkv, .mp4 and even many .wmv files
    • Movist, the same as VLC Player
    • MPLayerX, just like Movist or VLC Player (Mac App Store link)
    All of those applications are free.
  3. kazeth thread starter macrumors newbie

    Apr 20, 2013
    ok, its just that i have other avi files that work fine, they are xvid too, only the sound codec is different (mpeg layer 3). i can play the problem file in qt 7 and vlc fine, just a bit annoying that i cant use qt x seeing as it is so slick. perian made no difference so i uninstalled it, ive heard its incompatible with mountain lion anyway
  4. simsaladimbamba

    Nov 28, 2010
    It may be not supported anymore, but it is not incompatible, I and many others run it just fine in OS X 10.8 Mountain Lion.

    As for the problematic AVI file: In order to find out, what may be wrong with your video, you can use one of the following three applications to analyse the problematic video file.
    When done, you can use the "Report" (VideoSpec) and "Export" (Media Inspector) button to export a report,
    attachable to your next post via the [​IMG] button.
    In MediaInfo you have to go to the Menu Bar, select View > Text and copy the text via CMD+A > CMD+C and paste it via CMD+V into your next post.
  5. kazeth thread starter macrumors newbie

    Apr 20, 2013
    Format/Info : Audio Video Interleave
    File size : 1.36 GiB
    Duration : 1h 50mn
    Overall bit rate : 1 766 Kbps
    Writing application : VirtualDubMod (build 2540/release)
    Writing library : VirtualDubMod build 2540/release

    ID : 0
    Format : MPEG-4 Visual
    Format profile : Advanced Simple@L5
    Format settings, BVOP : 2
    Format settings, QPel : No
    Format settings, GMC : No warppoints
    Format settings, Matrix : Default (H.263)
    Codec ID : XVID
    Codec ID/Hint : XviD
    Duration : 1h 50mn
    Bit rate : 1 309 Kbps
    Width : 640 pixels
    Height : 272 pixels
    Display aspect ratio : 2.35:1
    Frame rate : 23.976 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Compression mode : Lossy
    Bits/(Pixel*Frame) : 0.314
    Stream size : 1.01 GiB (74%)
    Writing library : XviD 61

    ID : 1
    Format : AC-3
    Format/Info : Audio Coding 3
    Mode extension : CM (complete main)
    Codec ID : 2000
    Duration : 1h 50mn
    Bit rate mode : Constant
    Bit rate : 448 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 : 354 MiB (25%)
    Alignment : Split accross interleaves
    Interleave, duration : 42 ms (1.00 video frame)
    Interleave, preload duration : 500 ms
  6. simsaladimbamba

    Nov 28, 2010
    Thanks, I understand better now. It seems the AC3 codec, as you probably already know, is the problem, due to its multi-channel audio, which seems to be not supported by QT X, or at least that AC3 codec, which was used with video DVDs back then.

    Any reason you want to use QT X? Seeking is much slower in that excuse of a video player, among other things.
  7. Mrbobb macrumors 601

    Aug 27, 2012
    U may luv QTx but face reality, it *really* doesn't want to support all the format you wanto throw at it.

    Of course u can always re-encode ur files if u must use QTx.
  8. kazeth thread starter macrumors newbie

    Apr 20, 2013
    i just thought that it was the gold standard, what do you guys recommend then for overall viewing apart from vlc? or is vlc just 'the best'?
  9. DisplacedMic macrumors 65816

    May 1, 2009
    vlc is just the best
  10. Miat macrumors 6502a

    Jul 13, 2012
    Between Quicktime 7 and VLC, I have been able to play every audio or video file I have come across.
  11. Gav2k macrumors G3


    Jul 24, 2009
    Perian hasn't been updated for mountain lion yet so native QuickTime support is lacking. As above use vlc player or similar till the issues addressed
  12. Mrbobb macrumors 601

    Aug 27, 2012
    Is versatile. Best uhmmmm?

    Can i associate file types to VLC so when I click the video files, VLC automatically starts playing in a small window? Currently VLC wants me to LOAD video first into its playlist, THEN it will play. Looking for something simpler.
  13. dbroncos78087 macrumors regular

    Feb 27, 2013
    Northern Virginia
    Only sort of relevant question

    I noticed on my new MBA that when I play a video in QT it works fine until I pause it, then I get an echo in the volume. It sounds like the video has the regular volume and then a short time afterwards plays the same audio and it causes the echo. If I restart the video it sometimes fixes the problem.

    I wanted to see if you all had some thoughts. Currently I'm running 10.8.3 and using QT with Perian. Maybe VLC or something else would fix it. I read that I can go into the settings and set it to single playback but don't have my computer now to test it.
  14. DisplacedMic macrumors 65816

    May 1, 2009
    then you've got it set up wrong. when I double-click on an AVI file for example that is exactly what happens.

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