• VEGAS Pro

  MP4 files dropped in Vegas won’t play audio

  Posted by Nick Chester on March 6, 2010 at 9:17 pm

  While the audio in my MP4 files will play using Quicktime Pro or Windows Media Player, dropping them into Sony Vegas 9.0 for editing generates no audio track.

  Some info:

  Windows 7 64-bit
  Sony Vegas Pro 9.0b

  Media info:
  MPEG-4 Media Files (.MP4) 1280×720
  Audio bit rate 64kbps, Sample rate 24 kHz (mono)

  If anyone has any suggestions to remedy this, I’d very much appreciate it! Thanks.

  Chris Young replied 16 years, 5 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Chris Young

  March 7, 2010 at 6:42 am

  Nick ~

  Vegas is most likely not able to see the audio codec involved with your MP4 files. If you download the Gspot utility

  https://gspot.en.softonic.com/

  and interrogate one of your files with it Gspot will tell you which codecs are needed to decode it.

  Better still download and install Ffdshow (Open Source software), you need the 64-bit version, it works well on Win 7. It’s the top listed download on the site as of today at:

  https://sourceforge.net/projects/ffdshow-tryout/files/SVN%20builds%20by%20clsid/old%20builds/

  In most cases this will fix most of the MP4 codec play back issues associated with Vegas.

  If you really want to solve the problem read my posts starting at:

  https://forums.creativecow.net/readpost/24/906738

  as this may help you in an easier and more efficient workflow for handling MP4 files in Vegas 9.0. If you still have problems post back again.

  Chris Young
  CYV Productions
  Sydney

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