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

[Jeff Schroeder]

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]

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