Drop frames and stutter between clips not dropped.

david-ruby wrote on 8/21/2020, 10:01 AM

I have seen this happen starting at vegas 15. The preview screen shows dropped frames sometimes but other times it doesn't. But it always has a lil pause between a clip or two. Never a smooth transition from one clip to another. I have chased this problem again since V15 and with no answers from tech support. I am running a gforce 1015 ti that works great in Premiere pro BUT. Yep hold the but and no pickles please. I can say that Vegas 18 blows away Premiere pro as far as being able to actually play xavc-s 4k files with out a proxie on a timeline. That's pretty dang amazing. Way to go Vegas team! BUT! And yes it is back. Get it ? Back? Ok not funny. I still can't stop the preview window from skipping a frame or two proxie or not. Only happens when moving to next clip on time line. I have tried everything posted on the forums, you tube, reinstalled, etc. Nothing seems to cure it.Even using 1920x1080 24 xavc-s causes it to stutter. Premiere pro only works well for us using proxies so again congrats to Vegas! But help on this would be

amazing. I would love to put Vegas into our companies work loop.

I also must add I believe it has something to do with dynamic ram. Changing it as stated from 200 to 0 for certain things is a bug fix. And adding more dynamic ram say 500 makes it improve a bit. Must be a sweet spot somewhere.

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david-ruby wrote on 8/22/2020, 4:36 PM

I've always thought the slight delay when moving from one clip to another or moving the play head on the timeline was caused by I/O (aka disk) caching delay. I've wondered for a long time if running all of the project assets in a RAM drive would minimize the delay in filling the disk/memory pipeline, but I'm too much of a miser to buy the RAM required to do the test. Mostly, I just ignore the problem. When I'm really concerned about how a section might look, I render it and watch the section as a final rendered file. I work with 100 Mbps XAVC-S UHD files from an NVMe disk and seldom use proxies. I just plod along.

Here is a demo of my preview performance using ~8 Mbps AVC files rendered with AMD VCE hardware encoding from my UHD source. I did the proxy swaps manually for demo purposes.

That said, it wouldn't completely surprise me to learn that the Vegas Pro software pipeline is longer and slower than the hardware / OS part of the process. Few of us have the tools to analyze the issue with anything except trial and error approaches.

Interesting thoughts as well Dr John! I am starting to see this has been around for awhile now. I will see if I can get Gary the man to throw me to a tech and see if there is a cure for this. I did try to use my Vegas pro 15 on a client project but it freaked them out while watching on an external monitor their footage glitch like that. They were waiting for a crash LOL. I love Vegas and would love to help find this fix that is missing. I will also eventually upgrade my cpu but I am thinking there is more to this than an upgrade. I am running 32 gbs of ram as well so plenty there.

david-ruby wrote on 8/22/2020, 5:14 PM

Here is what I get. I looped this segment to show the pause. It doesn't do it during the first clips but it does it every time on the last one. Which if I was to put another clip at the end it would pause and jump to the new last one. cpu and gpu both running around 20% and 9 gbs of ram.

I picked some hand held setting up b roll cutting room floor shots so you could see the pause better. Def. not used in final video thank you LOL!!!! I don't suck that bad LOL : )

I tried again with proxies but she crashed on me. Could be because the Vegas capture window was left open. No clue.