• VEGAS Pro

  Video rendered in Vegas on Windows is out of Sync on Mac

  Posted by Max Mint on November 2, 2011 at 4:01 pm

  Using Sony Vegas Pro 11.0, I have rendered some clips (H264 mp4). The clips are looking good when viewing them on my Windows machine (using VLC or media player), but when viewing them on a Mac, they are out of sync (audio being in front of video).

  Any hints what could be the reason for this?

  Thanks for your help!

  Dave Haynie replied 14 years, 10 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Jeff Schroeder

  November 2, 2011 at 4:58 pm

  They are correct in both VLC and Media Player… Maybe get a third program to verify it is synchronized. If it all checks out it’s time to check the Mac.

  Windows 7 64-bit, ASUS P6X58D, i7 960 3.20GHz, 24.0GB DDR3, 12TB connected storage
  http://www.narrowroadmedia.com
• 

  Dave Haynie

  November 2, 2011 at 5:41 pm

  Did you view them in the Quicktime player on Windows and on the Mac, or some other programs? Same result? Be sure it’s a real sync loss, and not just the Mac having trouble playing AVC in realtime.

  I just helped my daughter get some camcorder footage into her Mac (a loner at the High School), and while this is a dual core i5-based Macbook Pro, I was kind of floored at how much trouble it had dealing with H.264/MP4. Not only couldn’t she edit the originals (AVCHD from HMC40 in PH-mode… these preview full speed on my PC in Vegas), but I rendered 1/4 resolution H.264/MP4, and we couldn’t even edit that. This was with Final Cut Express. Previews basically played audio but video looked like a very bad slide show. These did play properly in Quicktime, however.

  I ultimately created clips in something closely resembling Apple’s iFrame… 1/4 HD (960×540), I-Frame only, 20Mb/s. This edited just dandy on the Macbook Pro… heck, it would probably edit just dandy on my smartphone. These were batch converted with TMPGenc

  She was happy with the quality, even though it’s “ED” rather than HD. Turns out, for the past few years, she’s been capturing to Apple-flavored DV (DV in a Quicktime wrapper) by playing HD video from her Panasonic SD9 into one of the school’s DV cameras… ouch! But it worked on the school’s Macs.

  What’s up with AVC on the Mac, indeed?

  -Dave

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