pixelation

borristheboxer wrote on 6/23/2016, 12:42 AM
Hi guys been using dvda without fail & making great movies, both dvd & blueray. My only concern is i find some pixcelation of the footage once the dvd disc is burnt.
I can play the file perfectly on pc thou.
I use sony Vega 12 to edit & render the file as a dvd architect widescreen or normal but still getting pixelation
Archietect is set to make the dvd in 4.3 & 16.9 with next to no difference as well.
have checked on another dvd player & it looks a little better but still noticeable picxelation.
Whats the best way to resolve this & reduce pixcelation?

Comments

Steve Grisetti wrote on 6/23/2016, 7:27 AM
From your description, it doesn't sound like there's a problem with the DVD files themselves. So I'd check two things:
1) Use a good quality disc like Verbatim -- and avoid cheap discs like Memorex like the plague!
2) Rather than burn directly from DVD Architect, save the DVD as a Prepared File on your hard drive, and then use the free download ImgBurn to burn the VIDEO_TS prepared folder to your disc. ImgBurn not only does a very effective job of burning your disc files, but it also includes a feature that verifies the burn after.

One issue with ImgBurn. The download will potentially install other bloatware, so be sure to watch every screen as you install it on your computer, and opt out of the toolbars, etc., that it offers.
borristheboxer wrote on 6/23/2016, 6:36 PM
Yes I do burn all my dvd's & blueray from iOS files. I don't like to burn from dvda

Richard Jones wrote on 6/24/2016, 4:20 AM
Why not? I'm interested because I've never used anything but DVDA for this and, touch wood, have had no problems.

Richard
musicvid10 wrote on 6/24/2016, 7:18 AM
When rendering the dvd file for Architect, raise the VBR minimum bitrate to 2,000,000, average to 6,000,000, and maximum to 9,500,000. Post back here if it stutters.
borristheboxer wrote on 6/24/2016, 11:35 PM
In dvda I have been using a max bite rate of 9.000 it can go to 9.6 but still no difference with pixelation
aspect ratio is set at 16.9 can post a pic of the settings as i would but both vega & dvda settings line up. The one that doesn't is dvda is set for variable bit rate & not fixed... also I use a modified template in vegas. The only thing I changed was to make sure it renders in the best option in video rendering option
video output is Video: 25 fps, 720x576 Lower field first, YUV, 6 Mbps
Pixel Aspect Ratio: 1.457
EricLNZ wrote on 6/25/2016, 12:05 AM
How are you viewing your DVDs? You mentioned they look okay on your pc which makes me wonder if it's your DVD Player/TV setup. Are you using the same player and TV that you've previously used.

Also as you're in PAL territory why lower field first? PAL is usually top field first. It shouldn't make any difference as DVD players can handle either order.
borristheboxer wrote on 6/25/2016, 12:51 AM
Hi there, yes i have 3 dvd players that i check my work on.
On 1 of my samsung dvd players the pixelaton is very noticable, on my other samsung & sony it isn't as bad but only just there.
I was fine about it until 1 of my customers said something which is why im trying to solve this.

Lower field first was just how the template was & i never have changed that part but ill change it now to see if that helps :)
should i also constant the bit rate or leave it variable?
EricLNZ wrote on 6/25/2016, 3:23 AM
Assuming you have your TV connected with a composite, S-video or component connection then the quality may well depend not just on your player but also your TV. How are you connecting and what size TV is it.
musicvid10 wrote on 6/25/2016, 8:41 AM
"

No, changing the cap bitrate in a DVDA project does not change the bitrate of the source, nor does it do anything to prevent blocking that is already present.

The suggestions I gave you are for use in rendering your source MPEG-2 for DVDA, using the appropriate DVD Architect rendering template in some version of Vegas.

Do not render your video in DVD Architect. Doing so creates files whose minimum bitrates are too low to prevent blocking (incorrectly called pixelization) in shadows and transitions, in many cases!





borristheboxer wrote on 6/25/2016, 4:30 PM
All tv's in the house are connected to DVD players via hdmi cables, we gave up composite cables a while ago.
The oldest DVD player is maybe 4 years old & the newest one is only 6 months old so I am able to see any difference (old one shows pixelation)

All my videos are rendered with Sony Vegas using the modified dvda template with the only change being made as render in best to keep the quality up. The audio is rendered at the same time before I import the video & audio into dvda & creat the disc
PeterDuke wrote on 6/26/2016, 9:23 PM
"Doing so creates files whose minimum bitrates are too low to prevent blocking (incorrectly called pixelization)"

"Blocking" here means creating an image which appears to be made from blocks. It does not mean impeding the movement of something.
musicvid10 wrote on 6/27/2016, 12:09 AM
If you do nothing else, raise the minimum bitrate to 2,000,000.
If there is no improvement, you are getting playback artifacting, which is a whole different discussion.
Best of luck.

SphinxRa40 wrote on 9/25/2016, 5:54 AM

Stop using VBR and render out to DVDA template with CBR at max bps (9.8)

Musicvid wrote on 9/25/2016, 4:43 PM

Sphinx, that is well above playablet for many hardware players.

8 Mbps tops if CBR, which wastes a lot of media space. 

SphinxRa40 wrote on 9/26/2016, 7:51 AM

Sphinx, that is well above playablet for many hardware players.

8 Mbps tops if CBR, which wastes a lot of media space. 

True, but it helped me a lot with pixelation when i stopped render to VBR, media space i don't mind and tested on cheapest dvd-player and PS3 etc., never had any problems