DVD To XSVCD Motion Problems

[PM5K]

I am backing up a DVD (Insomnia) using Smart Ripper, then DVD2AVI (Forced Film) then encoding it using TMPGENC (CBR 1600)....

The problem I have is that in some fast motion scenes the piture gets noticeably pixelated.... I know if I encode it in a higher CBR then it fixes the problem to some extent....Also when I use CQ it also removes the pixelation, but then I have no idea how big the file will be.. I would like to be able to put my backups on two 80 minute cds using the highest quality I can to fill the disk....Also other than in fast motion the movie looks near DVD.....

What I am wondering is if there is anything else I can do to get rid of the pixelation ?

[puertorican138]

You could also try 2-Pass (VBR) right next to the rate control mode in TMPGEnc under the Video Tab. Set the average bitrate at 1600. With 2-Pass (VBR), you can get great results at a predictable filesize (with no pixelation). 2-Pass (VBR) will double your encode though.


Hope That Helps!!! :P

[poopyhead]

never use CBR....it has a really horrible bitrate allocation...

use VBR (i.e. CQ or 2 pass)....VBR allocates bitrates from slower scenes that don't need very much to higher scenes that need more bitrate, so these scenes will have less blockiness...CBR is used mainly in standard VCD 2.0 (and we all know their quality )

if you want predicatable filesize, do what puertorican138 says and use 2 pass vbr. you can set an avg. bitrate (which you can calculate your final filesize as if you had a cbr with that avg. bitrate)...however, it will take you twice as long to encode, but the quality is worth it.

also, make sure you set motion search acuracy to high quality (slow), do NOT set it any lower

[PM5K]

Thanks for the replies guys....

As I've gotten into doing this more and more I've begun to understand it..... Now I understand the problems with CBR, the entire picture uses the same biterate, even scenes that don't need a high bitrate (like the credits) and scenes that need more bitrate (like motion scenes) use the same bitrate....

I'm going to try some of the other variable bitrate options and see how they come out....

Thx again....

[puertorican138]

A constant bitrate encode can look real good if the bitrate is 2520. :P