.AVIs go to black intmt. in preview Vegas Pro 13

Jimigune wrote on 1/28/2017, 8:01 AM

I have an older desktop PC with fast graphics cards a top of the line AMD quad core CPU, and 32 gb of fast ram (fast system for its time 3-4 yrs ago), Vegas Pro 13. I am trying to edit a long AVI clip. But preview goes to black seemingly at random, and sometimes for many seconds, sometimes a minute. However, when I play it wlth VLC player, there are no glitches whatsoever. Its just an issue with Vegas. The video is on fast SSD drive. Its funny as Vegas will edit even my 1080P .2ts or amy .mp4 without problem. Its just an issue with AVI format. I tried bumping up the dedicated preview RAM to 1400 from the default, makes no difference. Is there a good solution to this, or do I just need to first convert to another format like .mp4 first? But I am trying to avoid losing resolution, of course.

Comments

ushere wrote on 1/28/2017, 7:37 PM

where is the avi from?

Jimigune wrote on 2/26/2017, 5:42 AM

Update: I worked on a different project video, also from camcorder .2mts footage, since that original posting. This time I rendered video in MP4 format, first in 1080P. I got just a few black flashes on an 8 minute rendered video, and it was always when a text overlay was on-screen. The black flashes show up both in the preview window when playing the rendered MP4, and any player I play it with, (usually VLC player). So its really the rendering engine creating the black frames, its not some other issue with the computer. At this highest resolution, there are the least black frames! At 720P, rendering the same project video, there are many more black flashes, and at 480 resolution, the video is totally unviewable, as there are random black flashes about 50 percent of video, and many occur in just a few seconds. Doesn't make sense, if something in my system is over-taxed and so creating dropped frames. I saw that for some users with intmt black frames, there was an easy fix. under options/ preferences. So I deselected "close media files when not the active application", but this made no change, no fix! I also tried setting rendering options for the two-pass method--- made no change. It's so disappointing....spent hours creating a wonderful video, but can't get a good rendering!

Also a correction to hardware: its really an 8-core AMD 64, and both Vegas Pro 13 64 and Windows 7/64 are running on fast SSD C: drive. What could be screwing up the rendering?

john_dennis wrote on 2/26/2017, 11:30 AM

Please post media properties using this FAQ

https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-file-properties--104561/

"Its just an issue with AVI format."

AVI is an often mis-used container. The Mediainfo report could be useful to forum members attempting to help you. A sample file could help, also.

OldSmoke wrote on 2/26/2017, 12:21 PM

Variable framerate in source?

Musicvid wrote on 2/26/2017, 7:29 PM

AVI is only a container that can contain hundreds of possible codec pairings. That's why the MediaInfo properties are so important for support questions.