user4440: So I'm pretty new to video production and I'm struggling with properly rendering 1080p game footage. My main problem is that multiple frames of the output video are pretty pixled, looking like this 

I'm working with footage recorded using fraps and I'm editing with Sony Vegas pro 12 atm. 
My project settings are matched to the footage I'm using in this particular project:

No doubt I messed up the rendering options somehow, since the raw footage looks okay. Here are the render settings I used for the shown output:

Can someone help me get those pixled scenes out of the video? Desired output format is MP4 since it seems easier to handle for youtube uploads.
Thanks in advance, I hope someone can help me with this.
Best regards,
Rickyfox

Edit:
I just discovered that about a minute of the output video just turned out black with the scene settings being exactly the same as the rest - anyone have a clue what that could be?

user2836: It honestly looks like something got corrupted with your export.  Have you tried encoding it more than once?  12 megabits per second with a 24mpbs peak should be more than sufficient for high quality 1080p video.  If anything, it may be excessive.  The quality you are getting looks more like what I'd expect at sub-1 mbps video for this quality level.  As an aside, it is worth noting that 2 pass will produce better results, thought it will extend encoding time.
One other thought is to try watching it in more than one viewer.  It is possible that the viewer you are using is struggling to decode the high data rate fast enough which could also result in the block issues you are seeing.  Basically, it looks like some of the blocks in the H.264 file are not encoding or decoding properly and that either means file corruption or insufficient decoding speed.
I guess to rule out data rates, you could try increasing it to 30mbps with 45mpbs peaks.  It shouldn't have to be that high (that's the high end of bluray data rates), but it should rule out the data rate entirely.
Update: From some additional reading, I would try turning on 2-pass and turning on the deblocking filter.  It supposedly should help.

4440: <p>So I'm pretty new to video production and I'm struggling with properly rendering 1080p game footage. My main problem is that multiple frames of the output video are pretty pixled, looking like this 
<img src="https://i.stack.imgur.com/rUhS5.jpg" alt="enter image description here"></p>

<p>I'm working with footage recorded using fraps and I'm editing with Sony Vegas pro 12 atm. 
My project settings are matched to the footage I'm using in this particular project:</p>

<p><img src="https://i.stack.imgur.com/VSKEn.jpg" alt="enter image description here"></p>

<p>No doubt I messed up the rendering options somehow, since the raw footage looks okay. Here are the render settings I used for the shown output:</p>

<p><img src="https://i.stack.imgur.com/TK7ZI.jpg" alt="enter image description here"></p>

<p>Can someone help me get those pixled scenes out of the video? Desired output format is MP4 since it seems easier to handle for youtube uploads.</p>

<p>Thanks in advance, I hope someone can help me with this.</p>

<p>Best regards,
Rickyfox</p>

<hr>

<p><strong>Edit:</strong></p>

<p>I just discovered that about a minute of the output video just turned out black with the scene settings being exactly the same as the rest - anyone have a clue what that could be?</p>
 2836: <p>It honestly looks like something got corrupted with your export.  Have you tried encoding it more than once?  12 megabits per second with a 24mpbs peak should be more than sufficient for high quality 1080p video.  If anything, it may be excessive.  The quality you are getting looks more like what I'd expect at sub-1 mbps video for this quality level.  As an aside, it is worth noting that 2 pass will produce better results, thought it will extend encoding time.</p>

<p>One other thought is to try watching it in more than one viewer.  It is possible that the viewer you are using is struggling to decode the high data rate fast enough which could also result in the block issues you are seeing.  Basically, it looks like some of the blocks in the H.264 file are not encoding or decoding properly and that either means file corruption or insufficient decoding speed.</p>

<p>I guess to rule out data rates, you could try increasing it to 30mbps with 45mpbs peaks.  It shouldn't have to be that high (that's the high end of bluray data rates), but it should rule out the data rate entirely.</p>

<p>Update: From some additional reading, I would try turning on 2-pass and turning on the deblocking filter.  It supposedly should help.</p>
