AAC3 audio broken for files larger than 1GB in 2.3.0

iOS, iPad, iPhone, tvOS specific usage questions
anjunatl
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Joined: 08 May 2014 18:17
Location: Atlanta, Georgia, USA

AAC3 audio broken for files larger than 1GB in 2.3.0

Postby anjunatl » 08 May 2014 19:22

I was trying to load some content to my iPad Mini for a flight and realized the audio wasn't working. I found this post about audio issues with MKV files on the iPad air using VLC 2.2.1 that has a solution involving changing the device's timezone and that worked for me. I am in Eastern Daylight Time and had to set my iPad's timezone to a future one, not a past one.

I'm still seeing the issue in 2.3.0, so I'm writing up as much info as I can on it here.

Environment info:
  • iOS 7.1.1 (11D201)
    iPad mini with retina display - ME276LL/A
    VLC 2.3.0
    Eastern Daylight Time (UTC-4)
Media info:
  • 1.46GB
    MKV container
    H264 MPEG4 AVC
    1280x720 resolution
    A52 (AC3) audio 48000Hz

    Audio does not play in current timezone: Eastern Daylight Time (-4)
    Audio does not play in past timezones: Central Daylight Time (-5), Mountain Daylight Time (-6), Pacific Daylight Time (-7)
    Audio does play in future timezones: Atlantic Daylight Time (-3), Greenwich Mean TIme (0), British Summer Time (+1), Central European Summer Time (+2)
Here are the cities you can use to get the timezones I used in testing:
  • San Francisco - Pacific Daylight Time
    Denver - Mountain Daylight Time
    Chicago - Central Daylight Time
    New York - Eastern Daylight Time
    Halifax - Atlantic Daylight Time
    Reykjavik - Greenwich Mean Time
    London - British Summer Time
    Zurich - Central European Summer Time

anjunatl
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Posts: 3
Joined: 08 May 2014 18:17
Location: Atlanta, Georgia, USA

Re: AAC3 audio broken for files larger than 1GB in 2.3.0

Postby anjunatl » 08 May 2014 19:44

Curious but related, I tried watching the videos on my Nexus 5 - the native video player had no audio. I downloaded MX Player and had no audio there either, but I found a "Use s/w audio decoder" setting in there and that made it work.Trying the timezone trick without the s/w decoder on the Nexus 5 did not fix the problem. Not sure if it helps as it's a different device and application but it may be of use.

dfuhrmann
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Joined: 02 Jul 2012 11:09

Re: AAC3 audio broken for files larger than 1GB in 2.3.0

Postby dfuhrmann » 08 May 2014 22:37

There are four cardinal points, not only two. ;-)


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