Blockiness and pixelation issue

Szerhij-Taranenko wrote on 11/8/2020, 5:13 AM

Hello everyone!

I am using Vegas Pro 17 (legal licensed version) to edit some 4k gaming footage I recorded using the software Bandicam. I have been experiencing the following issue: Initially whenever I rendered my 4k gameplay it significantly reduced in quality. I couldn't realize why that was happenning but then I found out that by default Vegas renders and quite a low bit rate. I tried manually increasing the bitrate and while this did improve quality, other issues started to happen. Occasioanlly, the entire screen gets pixelated and blocky. Also, if I am recording strategy games and there are numbers (for example the date) that quickly change they become super distorted.

As can be seen in the screenshot below the bitrate of my raw footage is 142024kpbs

After I render it using the following settings

I got a video with 57638 kbps.

This is a solid bit rate and it looks fine for YouTube, however I can't figure out how to get rid of this weird blockiness. This entire bitrate thing is completely new to me as is video editing generally. I tried setting it to constant bit rate instead of manual (both in Vegas and on Bandicam settings) but that doesn't seem to help. Honestly I am out of ideas and would really appreciate some help.

These are my specs:

Processor: AMD Ryzen 3950x

Graphics Card: RTX 2080 Super

RAM: 64GB Corsair Vengeance

Thank you everyone in advace!

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Comments

sirdani wrote on 12/26/2020, 3:19 PM

Pixelation is a known issue since NVENC HEVC appeared in VEGAS (Maybe from VEGAS 16).

Fix (for me) was the following:

Use Magix AVC/AAC MP4 encoder , instead of Magix HEVC/AAC MP4

Before Select Internet UHD 2160p 59.94fps (NVIDIA NVENC) preset click on "customise" template.

Important: Change the bitrates to equal values (both max and avg) to 60 000 000

Preset: High Quality + VBR High Quality

Szerhij-Taranenko wrote on 12/29/2020, 7:01 AM

Thank you so much, this solved it. I think the main thing is setting bitrates to equal values, as soon as I did that blockiness was removed.

Szerhij-Taranenko wrote on 6/1/2021, 3:09 PM

For anyone else who might be having this problem. If Sirdani's answer above does not work for you, try to use the Magix Intermediate or Sony XAVC (make sure you chose XAVC S Long) format. Overall, I found that both Magix AVC and HEVC (especially) are pretty problematic formats which cause a variety of issues, especially when you use higher resolutions.

RogerS wrote on 6/1/2021, 9:51 PM

I'd generally recommend MagixAVC with Mainconcept over their GPU accelerated counterparts like NVENC or Apple ProRes (Magix Intermediate is gone) if you are okay with larger file sizes.

kaftann wrote on 12/3/2021, 5:38 PM

For anyone else who might be having this problem. If Sirdani's answer above does not work for you, try to use the Magix Intermediate or Sony XAVC (make sure you chose XAVC S Long) format. Overall, I found that both Magix AVC and HEVC (especially) are pretty problematic formats which cause a variety of issues, especially when you use higher resolutions.

neither helped, any ideas? :-(

RogerS wrote on 12/3/2021, 9:45 PM

Start a new thread.

Szerhij-Taranenko wrote on 12/4/2021, 4:34 AM

For anyone else who might be having this problem. If Sirdani's answer above does not work for you, try to use the Magix Intermediate or Sony XAVC (make sure you chose XAVC S Long) format. Overall, I found that both Magix AVC and HEVC (especially) are pretty problematic formats which cause a variety of issues, especially when you use higher resolutions.

neither helped, any ideas? :-(

I would also recommend starting a new thread. However, if you provide more details maybe I can help.

Are you using screen recorded footage or camera?

If it's a screen recorder which one?

Do you select VBR or CBR (both in the recording program and in Vegas)

Which Vegas version?

Which encoders have you tried?

What is the bitrate and of fps of the original file vs. the encoded file?

Which codec did you use when orginally recording?

vkmast wrote on 12/4/2021, 8:19 AM

As @RogerS said, start a new thread.

@kaftann