Handbrake - Choppy Audio

Discussion in 'Mac Basics and Help' started by GabbAHH, Jun 15, 2009.

  1. GabbAHH macrumors newbie

    Jun 15, 2009

    I'm new to a mac and a lot of the whole video/audio encoding/editing world. I realized that a lot of the problems I googled led me to these forums so this would be a good place to sign up and ask away.

    So, I'm getting very frustrated converting some of my matroska videos to an mp4 container format (to put into itunes).

    For certain videos, the video is fine, but I seem to be missing half my audio, as if it was lagging/skipping for the entire duration.

    Under source it says the audio is "Unknown (VORBIS)", which leads me to my first question: What's an easy way to see what type of video and audio you have? I'm assuming my audio is ac3 since the mkv files I have problems with said how I may need an additional codec to play the audio. Strangely, some of the files that give me the message I am able to convert without problems. Currently I have ffmpegX, MPEGstreamclip, and VLC Player, on OS X. VLC Players gives me an even greater slew of problems in converting the mkv-- either I only get audio, or the video is all small blurry as if it was only a couple pixels. I know there are other programs like MP4box, MKVextract, and VisualHub, but I really don't want to add any more programs and make things more complicated if I don't have to.

    I've tried changing the sample rates if that means anything and I still have the same problem. Also, why can't I choose AC3 Passthru as the codec? Does that mean that the source audio really isn't AC3?

    Thank you mac experts!
  2. MorphingDragon macrumors 603


    Mar 27, 2009
    The World Inbetween
    See if VLC plays videos fine, if the Sound is choppy on VLC remove any trace of handbrake and VLC and reinstall them both. The only other problem could be CSS issues.
  3. GabbAHH thread starter macrumors newbie

    Jun 15, 2009
    It's definitely an issue with the file because playing it on iTunes, VLC, Quicktime all gave me that same choppy audio. However, playing the original Matroska video on VLC, it did get choppy at times, but it was less consistent (maybe starting around halfway into the video and progressively getting worse) and the cut out parts were smaller in duration.

    What's CSS?

    Also, hope you don't mind these random questions, but I clicked out of this text box to write this reply, and after clicking back, for some reason it doesn't show the blinking text cursor anymore. Why? Is this suppose to happen?


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