xvid to dvd blotchyness

[Berserker]

guys converting an xvid avi to dvd.

following baldricks guide.

when i watch the xvid avi file on pc its nice and clear.

when i burn and use the dvd on my player it goes blotchy especially on dark or black parts of screen.

i'm using tempegenc to convert to seperate dvd files and then dvdlab to generate movie and burn.

i'm geussing its a setting somewhere.

[BJ_M]

tell us the settings you are using

[Berserker]

https://www.videohelp.com/forum/viewtopic.php?t=186739

the same as the above guide.

but the calculator gives me a bit rate of 9406kb/sec


playing on a european DVD player not sure if that affects it?

[junkmalle]

Keep in mind that computer monitors usually use a lower gamma setting than television. That means dark parts of the picture will be much darker on the computer. So the blotchiness might be in the AVI file, you just don't see it because it's so dark.

Otherwise, try a higher bitrate on your MPEG 2 encoding. Or a smaller frame size, eg, 352x480 instead of 720x480.

[Berserker]

so try a bitrate higher than the 9000?

[junkmalle]

Berserker, I was writing my reply when you posted yours. So, no, don't go higher than 9000. Given that you have an XVID source you can probably go significantly lower.

If the dark parts of the picture are rendering too lightly on your television you may have to adjust the brightness, contrast, and/or gamma (in TMPGENC) to get them dark enough.

I recommend you use a RW disk (if you're not already) until you get this sorted out. And work with small segments to save time!

[ZippyP.]

Or a smaller frame size, eg, 352x480 instead of 720x480.

If you're converting a 700MB sized avi to DVD then I suggest 1/2 DVD resolution (352x480) as well, as that is likely the closest. Upsizing is generally not recommended. It should reduce some of the blockiness you see. As well you can turn on the "soften block noise" filter in TMPGEnc under the quantize matrix tab.

[Berserker]

thanks for the advice guys took a closer look at original material and that seems to be the issue.