DroidForums.net is the original Verizon Android Forum! Registered Users do not see these ads. Please Register - It's Free!
Results 1 to 2 of 2

Thread: How-to: Fixing MKV Audio Problems in Rockplayer

  1. Droid Newbie
    Bloodred's Avatar
    Member #
    Join Date
    Sep 2010
    Droid X

    Lightbulb How-to: Fixing MKV Audio Problems in Rockplayer

    So today I wanted to try playing some MKV video files in Rockplayer, only to find out the audio wasn't working right (either distorted or no audio at all). After doing a little research, it turns out there are 2 primary reasons for this:

    1) The audio component of the MKV file is surround sound, for example a 5.1 surround AAC file. (this caused distorted audio when opening in Rockplayer)
    2) The MKV file is set up for dual audio, as commonly used for anime and other english dubbed shows. (this caused no audio at all when opening in Rockplayer)

    Now that I knew the problem, I wanted to find a solution. Unfortunately it's not easy due to the complexity of MKV. Converting the MKV to another file format won't work, since it will still have the offending audio track embedded. So, what you have to do is remove or re-encode the problematic audio track(s). Here's how I did it:

    What you'll need:

    MKVtoolnix: MKVtoolnix 4.3.0

    MKV Extract GUI (extract into SAME FOLDER as MKVtoolnix): MKVExtractGUI

    Mediacoder Audio Edition: MediaCoder Audio Edition

    Mediainfo (if you don't know your video's framerate already): MediaInfo

    The Process:

    1) Open MKV Extract GUI in your MKVtoolnix folder (mkvextractgui.exe)

    • Click the checkbox next to the video track and *ONE* audio track for each MKV file
    • Note: if the MKV has embedded subtitles (software subs) you can choose to extract them as well.
      • In order for Rockplayer to read the subs, they must be .SRT format, the same name as the corresponding video file, and in the same folder as the video file.

      • if they aren't working later, check that your "Show Subtitle" option is on in Rockplayer settings.

    2) Open Mediacoder Audio Tool

    • Drag & drop in all extracted audio tracks from step 1
    • Shift-click to select all files in the list
    • Set left "Audio" tab to:
      • Encoder: CT AAC+
      • Channel: Stereo
      • Gain: 6 dB (necessary when going from 5.1 to 2.1)

    • Set right "CT AAC+" tab to:
      • Bitrate: 137 KBps
      • Mode: Stereo

    • Hit "start" button to begin transcoding

    3) Open Mediainfo, open one of the extracted video tracks, & copy FPS number (usually 23.976 in my experience)

    4) Open MKV Merge (mmg.exe in your MKVtoolnix folder)

    • One pair at a time, drag & drop in the extracted video track and the *NEW* audio track ("transcoded" will be at the end of the filename by default)
      • Click on the video track, then click "Format specific options" tab
        • paste in the FPS number copied earlier

      • Select output folder

    • Click "Start muxing" button
    • Once the file is muxed, click "remove all" before adding more files.
    • Skip through the first finished file in a media player to see if the video & audio synced properly. If not, the FPS was entered wrong during step 4. Start over from step 3.
    • If the audio is synced properly, repeat for each audio/video track pair from step 2.

    5) Copy the files onto your SD card, open with Rockplayer, and enjoy!
    If anyone has an easier way of doing this, I'm all ears. I searched for hours and couldn't find an easier way.
    Last edited by Bloodred; 09-18-2010 at 01:54 AM.
  2. Master Droid
    timrock's Avatar
    Member #
    Join Date
    Aug 2010
    1 times
    Galaxy nexus
    i convert mkv's all the time using handbrake to mp4 format, and never have an issue with the audio. The audio stays in sync. I use Rockplayer as well. Act 1 gave me issues with the audio being out of sync, but never had this problem with Rockplayer. Try handbrake and use to ipod/itouch preset. It will save you a lot of time.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Similar Threads

  1. RockPlayer Beta is now public. AVI playback galore!
    By wuyanks in forum Android News
    Replies: 93
    Last Post: 01-08-2011, 03:55 PM
  2. New RockPlayer DIVX player and more
    By GoBlazers in forum Android General Discussions
    Replies: 47
    Last Post: 06-12-2010, 05:31 PM
  3. Anyone Else with Bluetooth Audio Problems?
    By PostR in forum Motorola Droid
    Replies: 10
    Last Post: 04-30-2010, 01:26 PM
  4. video and audio problems
    By harmy82386 in forum Android Audio and Video
    Replies: 4
    Last Post: 01-19-2010, 02:15 AM
  5. Audio routing problems
    By texasPI in forum Android Tech Support
    Replies: 1
    Last Post: 11-26-2009, 09:14 AM

Search tags for this page

android mkv no sound

how to fix dual audio for android

mkv no sound android

rockplayer 2 no audio
rockplayer android no sound
rockplayer embedded subtitles

rockplayer mkv

rockplayer mkv no sound

rockplayer no sound

why no sound on rock player 2
Click on a term to search our site for related topics.

Tags for this Thread

Find us on Google+