Video Freezing

impact wrote on 3/22/2013, 11:31 AM
I edited a 4 minute HD video project in Vegas 9.0e. The video was shot with an AVCHD cam in 1920x1080. The edit went well with only a few hiccups at edit spots. I rendered in Sony AVC (.mp4 .m2ts .avc) with the intent of putting the video on YouTube. The rendered project plays back beautifully until about the 3 minute mark. Then the video freezes and the audio continues normally to the end. Any help would be appreciated.

Comments

MikeParticles wrote on 3/25/2013, 5:08 PM
I have experienced this exact same problem and I thought I was going crazy! My project is as simple as it gets: one 3:10 minute event with fades at both ends. The source clip is AVCHD (1440x1080-60i) from a Sony HDR-HC3, and I am rendering to Sony AVC, AVCHD 1920x1080-60i.

In the rendered video, somewhere around the 2:00 mark, the video stutters while the audio continues and the audio is then out of synch from that moment to the end. If I render to a different format (XDCAM EX, MainConcept AVC, Quicktime, VFW), the problem is not there.

I am using Vegas Pro 11.0 build 701 on a 64-bit Windows 7 machine with a Core2-i7.

I am using the Windows Media Player to test playback of the rendered video - maybe the problem is with WMP and not Vegas? I doubt it because the audio synch problem is always there in the second half of the video whether I playback from the beginning or seek past the problem point.

Considering that I am using a Sony camcorder, Sony Vegas, and rendering with the Sony AVC codec, I am surprised to be having this problem.
dxdy wrote on 3/25/2013, 7:01 PM
Does the same thing happen with the MainConcept mp4 codec?
musicvid10 wrote on 3/25/2013, 7:45 PM
AVCHD is not a delivery format. Mainly for hardware acquisition and playback.
It takes a lot of CPU power to play back without video stalling.

Render as MP4 instead, with a sane bitrate.
MikeParticles wrote on 3/25/2013, 8:24 PM
Rendering to other formats does not exhibit the same problem, but that seems like a work-around not a solution. Is the Sony AVC 1920x1080-60i profile unusable for anything longer than 2 minutes?

>It takes a lot of CPU power to play back without video stalling.

My computer has no problem rendering the AVCHD files captured from the camcorder, so why would it have a problem with an AVCHD file rendered by Vegas? I am running a 2600K processor overclocked to 4.5 Ghz, and most computational tasks are a walk in the park!
MikeParticles wrote on 3/25/2013, 8:26 PM
Correction: My computer has no problem *playing* the AVCHD files captured from the camcorder ...