Vegas 12 render errors

marcel-vossen wrote on 8/22/2015, 6:17 AM
Hi there,

I am working on a music video and the project has some pre-rendered scenes that I rendered in MXF , the rest of the footage is MP4 and MTS.

The strange thing is that the result of the render process is sometimes okay, and sometimes the MXF scenes are replaced by stills from the scene before the MXF for the entire duration of that scene...At other times a scene is totally messed up (like a disturbed digital TV reception with ghosting and blocks)

When i reboot my system and render the same project AGAIN, the result is okay, so the project is not corrupt.

This unpredictable behavior is pretty annoying, esp. because rendering the project takes several hours.

Does anyone know what can be done to avoid this bug in Vegas 12 ?
(except rebooting first every time before I render a project of course)

Marcel

Comments

Former user wrote on 8/22/2015, 9:26 AM
If you are using GPU to render, change it to CPU and see if that helps.
wwaag wrote on 8/22/2015, 10:41 AM
Does anyone know what can be done to avoid this bug in Vegas 12 ?

I've experienced the same sort of problem, especially when using avi digital intermediates such as cineform. It's probably safest to reboot, especially for a very long render, but I simply save and close the project, reload the project and then render. Doing this works for me, although you might want to also close Vegas and open a new instance before re-opening the project.

wwaag

AKA the HappyOtter at https://tools4vegas.com/. System 1: Intel i7-8700k with HD 630 graphics plus an Nvidia RTX4070 graphics card. System 2: Intel i7-3770k with HD 4000 graphics plus an AMD RX550 graphics card. System 3: Laptop. Dell Inspiron Plus 16. Intel i7-11800H, Intel Graphics. Current cameras include Panasonic FZ2500, GoPro Hero11 and Hero8 Black plus a myriad of smartPhone, pocket cameras, video cameras and film cameras going back to the original Nikon S.

musicvid10 wrote on 8/22/2015, 11:36 AM
Good advice. I save and reboot before rendering even modest projects.
Its the undo buffers that eat up memory in open projects.
marcel-vossen wrote on 8/22/2015, 12:57 PM
Thanks all, I already have GPU turned off, so I'd better reboot first then...it just happened again, first render 100% okay, made a minor change, rendered again, another 2 hours lost... :(
ddm wrote on 8/22/2015, 1:22 PM
>>>The strange thing is that the result of the render process is sometimes okay, and sometimes the MXF scenes are replaced by stills from the scene before the MXF for the entire duration of that scene...At other times a scene is totally messed up (like a disturbed digital TV reception with ghosting and blocks)

I was having a very similar problem but the actual pre-renders were ok, they just previewed that way. If I opened the file in the trimmer, it was fine. I had this problem crop up several times in my last project, occasionally showing up in handbrake renders out of vegas. It was always with mxf pre-renders. The odd thing of having a previous mxf show up in the first few frames of another mxf (again, only in preview) seemed to suggest to me that vegas was getting mixed up or the memory buffer for mxf files was effed up. As an example a clip of, let's say "Bruce" was one pre-render, a clip of "Betty" was another mxf pre-render. All of a sudden, a few frames of Bruce appeared at the very top of Betty's clip, with some boxy green artifacts until after only a second or two it would clear up. Again, these anomalies would not actually be in the pre-rendered clip, but they would make it into the preview and even doing a Shift B render at best would not clear it up and it would sometimes make it into a render. Weird. I was able to work around it but I stopped pre-rendering mxf and used XAVC instead with no further problems. (XAVC, which is also an mxf wrapper, but the mxf I was having problems with was the "Sony MXF" from the Output Format templates.)
ddm wrote on 8/22/2015, 2:35 PM
To add to my previous post, these errors occurred in Vegas 13 with GPU off.