Disappearing footage on timeline.

Former user wrote on 8/28/2023, 4:26 AM

Editing on Vegas Pro 20 and notice that some footage sometimes disappears on the timeline where the footage goes blank. I can still hear the audio and I know the footage is there, but there is a black spot on the screen until I re-start the program. I suspect this probably requires some tweaking. Other parts of the timeline are fine, just some footage here and there 'blank out' during preview. How can I tweak the program so that I always see previews? So far I lowered the resolution of previews to 50%, but still get the blank outs. Any ideas?

Comments

RogerS wrote on 8/28/2023, 5:05 AM

What kind of footage is it? Are you using the Quicktime plugin (see preferences/ deprecated features)?

What is your GPU?

Dexcon wrote on 8/28/2023, 6:20 AM

If you could post a detailed MediaInfo report (a free app) of an example of your video media - https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/ - that would be most helpful.

From the OP's signature, the GPU is an NVIDIA GeForce RTX 2070.

Wolfgang S. wrote on 8/28/2023, 8:05 AM

@Former user

are you talking about the internel or the external preview (on a second monitor), or both?

Former user wrote on 8/28/2023, 10:40 AM

@RogerS No Quicktime plugins, that I am aware of. Should I be using one?

@Dexcon The footage is h264, HD, 8 bit, .MOV format, hardly taxing.

@Wolfgang S. Internal preview. When you launch Vegas, you see the preview window.

I suspect it is a cache issue, but cannot be sure.

RogerS wrote on 8/28/2023, 6:20 PM

No, Quicktime is a potential cause of the problem, not a solution. Other guess is NVDEC issues?

Is your GPU the 2070? Is it doing the decoding in preferences, file io?

Is the footage Canon (which camera?)

Former user wrote on 8/29/2023, 2:47 AM

@RogerS The GPU is enabled for decoding. I boosted the RAM for preview a little more. I have a Panasonic GH series camera. Since I have not enabled anything in the preferences, perhaps I can try to enable and see what happens.

RogerS wrote on 8/29/2023, 3:10 AM

You could try disabling NVDEC (change hardware decoder to none or enable legacy AVC if it's all 8-bit footage) and see if the blackouts go away. It may worsen performance though.

Former user wrote on 8/29/2023, 4:11 AM

@RogerS Sure, my camera is kind of legacy and it is all eight bit footage. It makes sense to use legacy settings then.

Former user wrote on 8/29/2023, 1:55 PM

It occurred to me that I could simply find and use an older version of Vegas for my camera footage if the newer versions cause too many complications.

RogerS wrote on 8/29/2023, 7:22 PM

Using the legacy decoder turns VEGAS into something like VP 14 or older.

Hopefully issues with NVDEC will be addressed going forward.