Video becomes awfully pixelated after render

JordiTK_ wrote on 11/17/2023, 12:20 PM

Hello,

There is something off with my render settings and I need help finding what it is. I use Sony Vegas Pro 13.0. The issue is visible in these screenshots;

Screenshot from the recorded video in Media Player (minus the video buttons, of course);

Screenshot from the Best/Full preview in Sony Vegas;

Screenshot after rendering the video in Media Player;

You can see quite a lot of pixelation in the post-render screenshot upon zooming in, while there is no noticable difference between the first and second screenshot (aside from the normal contrast differences). The issue clearly lies in the rendering progress. These are my render settings;

These are my project settings;

Any help is appreciated.

Comments

mark-y wrote on 11/17/2023, 2:49 PM

Would need your media properties

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

JordiTK_ wrote on 11/17/2023, 5:22 PM

Though I appreciate the comment, the pixelation is visible on any kind of media used in the project, including images. This is an issue with the project's rendering, not its files.

(Edit) - Before anyone asks, the issue is also not the media player I am using.

EricLNZ wrote on 11/17/2023, 5:58 PM

@JordiTK_ You asked for help. In order to provide that it's important we see your source material details. So please provide Mediainfo.

Your Project Properties look strange. 60 fps Upper field first (interlaced ) with Deinterlacing Blend Fields? Is your source material really interlaced?

EricLNZ wrote on 11/17/2023, 6:04 PM

@JordiTK_ Also your render average bitrate is on the low side. So again Mediainfo on your source would help to see what its bitrate is.

Dexcon wrote on 11/17/2023, 6:08 PM

Does the problem occur when rendering using the 8-bit pixel format instead of 32-bit? Ditto with the rendering format set to Good rather than Best?

Also, the Project Properties menu suggests that the project is an interlaced project because the field order is set to 'Upper', yet the Render As menu has 'Enable progressive download' checked. Perhaps the rendering process is introducing the problem by rendering an interlaced project to a progressive render. If it is a progressive project, then it would be usual to set the field order to "None (progressive scan)".

JordiTK_ wrote on 11/17/2023, 7:16 PM

Increasing the bitrate fixed the issue. I have bumped it up to 240/135 and the render now looks indentical to the preview. I guess it seems I'll have to do some more research about the effect of bit rates.

On a final note, I still see no use for the Mediainfo, because this also happened on Vegas-generated media such as text and colours. Regardless, here is the Mediainfo of the source video anyway for possible future reference;