Rendered AVCHD begins to stutter

Locust wrote on 9/14/2009, 2:14 PM
So, being absolutely THRILLED that Vegas Pro 9 doesn't outright crash when rendering full-frame AVCHD, I threw a bunch of clips together that I took with my Sony Handycam, put music to it and had a real neat timeline going, only to find out that Vegas Pro hoses the rendered output consistently on the same clip, but never in the same spot on the clip and never when I just render the clip + a few extras before and after.

What happens is that suddenly the normally smooth video begins to chop up and stutter about 3 minutes into the video, sometimes on the same spot, sometimes not, and then the video loses sync, while stuttering and looking like crap. I've tried reducing the thread count from default down to 1. Didn't make a difference.

Anyone else have this issue, or an idea that might be able to help?

Comments

TeetimeNC wrote on 9/14/2009, 5:14 PM
This is a long shot but it has worked for me with similar problems with 60p AVCHD and Vegas 8. Try trimming a few frames off the end of the clip and see if that fixes the problem.

Jerry
srode wrote on 9/14/2009, 6:14 PM
What player to view the finished AVCHD file? Did you get the Sony Picture Utility with your camera? If you use it to view the finished file it should play very smoothly, at least it does on my system.
Locust wrote on 9/14/2009, 10:04 PM
So, I pretty much halved the one clip, leaving a huge black space in the video and re-rendred. It managed to get past the one part where it usually starts to chop up, but started getting choppy, stuttered and lost synchronization shortly after the next clip showed up.

All the clips I can play individually without problem using either VLC, Windows Media Player or the Sony PMB. It seems to be a problem of rendering a certain amount of it together, as if the Sony AVC encoder can't render more than a few minutes of video before crapping out.
Marco. wrote on 9/14/2009, 11:36 PM
Remux the rendered output using a tool like TSMuxer.

Marco
srode wrote on 9/15/2009, 3:04 AM
So the finished product when viewed with Sony PMB is choppy too? I have yet to see that on any of my AVCHD projects - it's normally a very smooth player compared to the rest.
Locust wrote on 9/15/2009, 11:08 AM
I don't frickin believe it! Demuxing it and remuxing it (with what I can only assume is a PROPER muxer) results in a problem free AVCHD file!

Thanks Marco! Maybe I'll see if I can't just render the individual streams and mux them later, saving a step, and a crapload of disk space.
Marco. wrote on 9/16/2009, 5:47 AM
Glad it helped. I use tsMuxer. Using this tool you needn't demux the files first. You can just feed with your rendered AVCHD file and tsMuxer does demuxing automatically when importing the file.

So what you do is adding all the AVCHD files which needs the remuxing, switch the output setting to M2TS muxing and start the process. Only one go for several AVCHD files.

Marco

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chrisf wrote on 12/23/2009, 6:01 AM
Just wanted to say thanks too, Marco. I was seeing the same behaviour as Locust; V8 rendering to AVCHD crashing, V9 rendering AVCHD files that stuttered on playback. But passing the rendered file through TSMuxer did the trick. Thanks very much!!