4k to SD DVD Quality issue !!!

[Nano-25]

Hi

I tried to read in this forum about how to make sd dvd but i do my best still
i have block y image in dark scenes so please i need some one pro mention the exact steps to make sd dvd with production quality.

you can see the below images showing you kind the blocks in the image.

 

[Raul Gonzo]

what program are you using? at what settings?

 

[Nano-25]

red alert, fcp studio

1-Render 2k from red alert.
2-import video in compressor.
3-compress to m2v with best setting.

also i tried
1-import _H proxy in fcp time line.
2-compress by compressor to m2v.

also

1-down convert by red alert to sd i mean 720*576.
2-import in fcp.
3-compress by compressor to m2v.

Best Regards.

 

[Alex.Mitchell]

That's so weird. If I render into ProRes 2k and then toss that into Compressor it looks fine. Maybe our settings are different though. At any rate, try rendering out as ProRes and then toss it into compressor and use the "Best Quality: 90 Minutes" preset. Make sure its set to two pass VBR at a reasonable bitrate.

 

[ThomtheEditor]

We managed to get the best quality by exporting our timelines as self contained QT's with current settings and then taking that standalone qt file into compressor and get perfect results, even 90 min fastest setting appears perfect.

Hope that helps,
~T

 

[Jason Diamond]

what format are your timelines? codec?

 

[Nano-25]

what format are your timelines? codec?

2k prores HQ


guys still i did not find the solution

this problem only happen with dark sence ...

regards

 

[ThomtheEditor]

what was your debayer quality out of RA?

Half or lower could produce that in dark areas.

Also did you originally shoot 2, 3, or 4k?

 

[Robert Niessner]

This blockiness has to do only with MPG2 compression and not with debayering. Please make a screenshot of all MPEG2 settings used in compressor.

As Alex already suggested, you have to use VBR and two pass encoding, otherwise you get anywhere near professional quality.
Do not set the minimum bitrate too low, this will lead to blocks in dark areas.

 

[Uli Plank]

If the footage from the Red is very clean in the dark areas, you may want to add a little bit of noise (no kiddin').

 

[Robert Niessner]

If the footage from the Red is very clean in the dark areas, you may want to add a little bit of noise (no kiddin').

That would be the same as raising the minimum bitrate. If you add noise the encoder sees more details and throws a higher bitrate on it.