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Pixellated/blocky previews and rendering.

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Al Burdock
Pixellated/blocky previews and rendering.
on Sep 12, 2015 at 5:57:44 pm

Hi all,

I've just tried to create a video in Sony Vegas and for some reason it looks like this -







It's pixellated to heck and I just can't figure out why. This applies to both the preview and the rendering too.

http://i.imgur.com/GtHd4y9.png

http://i.imgur.com/ZwCzOGV.png

Last time I rendered a video there were no problems so I don't know why this has happened. All the videos I am taking clips from are HD quality and don't suffer from the problems you can see here. They are all simple avi files.

I've just made a whole video and didn't realise that this was an issue until I completed and rendered it. I thought the pixellation in the preview would only be limited to the preview (as that's normally a bit rough looking anyway). Now the whole thing I've spent two days making looks terrible >.< I've spent a while googling and trying things but nothing has worked.

I'm using Vegas Pro 10.0. I'd appreciate any help or advice!


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Aaron Star
Re: Pixellated/blocky previews and rendering.
on Sep 12, 2015 at 10:31:19 pm

You would need to post media info on your camera source, any intermediate formats, Project settings, and render as selection. There is not enough info on what you are doing to help.


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John Rofrano
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 12:12:48 pm

What codec do the AVI files use? I'm guessing it's DivX, or Xvid, or some other x.264 codec. If so, this is your problem. Vegas Pro probably can't process the codec properly. You'll need to convert it to a format that Vegas Pro can edit like M-JPEG or proper AVC/H.264 MP4 (not in a avi file).

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Al Burdock
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 1:37:57 pm

Hi John,

I'm not completely sure which codec the AVI files use. How can I find out?


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John Rofrano
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 1:44:11 pm

[Al Burdock] "I'm not completely sure which codec the AVI files use. How can I find out?"
Download a free utility called MediaInfo and open the file with it and post the output here. This will tell you the codec and lots of other information.

BTW, you can post images right here on the COW like this so we don't have to click on unknown links:



~jr

http://www.johnrofrano.com
http://www.vasst.com



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Al Burdock
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 2:02:20 pm

Oh right, thanks! I gave it a try, this popped up. Is this any help?

http://i.imgur.com/OeM8kIs.png

I tried to image upload button but the picture wouldn't show up. Doy.


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John Rofrano
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 2:51:35 pm

[Al Burdock] "Oh right, thanks! I gave it a try, this popped up. Is this any help?"
That doesn't help because it's some MP4 file and NOT the AVI file that you originally asked about. You are showing an AVI file in your original screen shot.

Also, in MediaInfo, you must use View | Text so see the details. You can post them here.
[Al Burdock] "I tried to image upload button but the picture wouldn't show up. Doy."
Here are further instructions:



~jr

http://www.johnrofrano.com
http://www.vasst.com



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Al Burdock
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 3:06:22 pm

Oops, wrong video. This one is definitely one of the ones that I'm trying to use in Vegas but keeps emerging all pixelly. I pressed view/text this time.



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John Rofrano
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 3:14:43 pm

OK, so as suspected, you have AVC/H.264 video in an AVI container. Vegas Pro doesn't like that. AVC/H.264 belongs in an MP4 container. I would suggest that you either use the MP4 format instead of AVI or you convert the AVI file to M-JPEG or Lagarith, or some other format that Vegas Pro is expecting to find in a AVI file.

BTW, you can use AviDemux 2.5 to convert the video to MJPEG with PCM audio if you'd like:



~jr

http://www.johnrofrano.com
http://www.vasst.com



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Al Burdock
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 3:51:37 pm

Thanks! Damned Vegas is hella complicated. You're right, I just tried playing with an mp4 video in vegas and it looked fine with no pixellation.

I can convert the avis I have to mp4s no problem. I'm guessing there's no quick way to fix the overall video I created in vegas though, I'll just have to start it all over again using mp4s instead of avis?


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John Rofrano
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 7:08:00 pm

[Al Burdock] "I'm guessing there's no quick way to fix the overall video I created in vegas though, I'll just have to start it all over again using mp4s instead of avis?"
You might want to try and re-wrap the AVI contents into MP4 with AviDemux 2.5. Try using the parameters Audio: COPY, Video: COPY, Format: MP4 and it should just copy the audio and video from the AVI file to an MP4 file. See if Vegas Pro will work correctly with the resulting MP4 file. This should happen very, very quickly because it's just doing a copy into a new container and not a re-render.

Make sure to use AviDemux 2.5 and not 2.6. Vegas Pro has problems with files from the 2.6 version so I've gone back to using 2.5.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Al Burdock
Re: Pixellated/blocky previews and rendering.
on Sep 13, 2015 at 1:36:18 pm

Hi Aaron,

sure, sorry about that. I hope these might help -

Project properties - http://i.imgur.com/Ru2CiDM.png

Options/Preferences - http://i.imgur.com/rEC9L7O.png

Render as settings - http://i.imgur.com/mQSPXEo.png

I'm not very savvy with this program so I'm afraid I don't know how to find out what the intermediate format is >.<

I did recently change a lot of settings in order to get rid of the horizontal line error when rendering videos, so I might've messed something up along the way. I'm considering just uninstalling and reinstalling it to see if that'll help.


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Aaron Star
Re: Pixellated/blocky previews and rendering.
on Sep 14, 2015 at 12:25:35 am
Last Edited By Aaron Star on Sep 14, 2015 at 12:53:26 am

The Media info you posted says your source file is 1920x1080 @47.9 FPS. This is not a standard video format. Then you are trying to render to 60i profile. Please verify that the media info posted is the rendered file or source file.

Who created the 47FPS file? I would get a new file of the source in 1920x1080-30p or 60p if the source was shot that way. Vegas maybe having a hard time with MP4 in AVI, but my guess the conversion from 47FPS to 60i at such a low bitrate (1.9Mbs) is creating the picture issues you see.

One thing I would try is using the match media button in the upper right corner of the prject settings. Then choose one of your source files. Then when in Render As, choose a profile under Sony AVC that has an = sign next to it. If an = does not exist, choose an Internet profile of 1920x1080-30p.

2Mbs for 1080p is really low for posting to YouTube. I would see if you can get the source material above 12Mbs, and render to at least the same bitrate.

If your source material is coming from some other NLE, like final cut, get an export to ProRes, DNxHD.mov, or XDCAM-EX.mxf, and not .AVI. If it is something like Resolve, export to MXF OP1A, Sony MPEG4 422(225Mbs) profile, or the XDCAM MPEG2 profile. Then bring that file into Vegas for editing.


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Al Burdock
Re: Pixellated/blocky previews and rendering.
on Sep 14, 2015 at 8:54:50 pm

Hi Aaron, thanks for the recommendations! It's all gotten way too complicated for me so I've just started it from scratch using some different videos instead. It seems to be working okay now.


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