Weird artifacts in mp4 after rendering in Vegas, help?

[bojadada]

Ok, after I render a video in sony vegas, these weird artifacts show up, you can see them right under the basketball hoop and to the right of the tree. I render it to a Sony AVC MP4 file. How do I fix this? These are my video rendering settings.
Video format: AVC
Frame size: 1280x720
Profile: Main
Entropy coding: CABAC
Frame rate: 29.970 (NTSC)
Field order: None
Pixel aspect ratio: 1.0000
Bitrate: 6,000,000

[aedipuss]

what was the source and can you post a screenshot of the same frame.

[bojadada]

It came from my camera, and it was originally a m2ts avchd file. If you mean of the same frame of the source file, here.

[aedipuss]

i'd try using a higher quality h264 encoder. handbrake or mediacoder using x264 might clear it some.

[poisondeathray]

Try Mainconcept AVC, it's more stable than Sony AVC in Vegas . (Actually both implemenations are poor, it's just this that Mainconcept version is less bad)

Another option is to frameserve out using debugmode frameserver , or export a lossless intermediate, and use another encoder like x264 ; many GUIs & front ends are available