DV Settings for least reincoding

TVJohn wrote on 7/16/2023, 1:16 PM

I have been archiving many old DV tapes and was looking for the least "softening" settings. I have set the timeline properties to match source, however many render as mp4 options soften the images. DV had a certain "grain" that resembled film grain that appears lost with the mp4 render options. I would like to keep the output file size similar to the original say in a case 25g in/out.

Liquid used to have a "Fuse"output that would just consolidate the timeline.

Any thoughts?

Comments

3POINT wrote on 7/16/2023, 1:42 PM

DV is interlaced. MP4 is mostly progressive. So deinterlacing method becomes important. Vegas has several options for deinterlacing, try and see which method fits your needs.

john_dennis wrote on 7/16/2023, 2:51 PM

Happy Otter Scripts solution:

https://www.vegascreativesoftware.info/us/forum/how-to-480i-to-720p--119206/#ca743883

mark-y wrote on 7/16/2023, 3:34 PM

In x264 (Voukoder), these settings will help preserve grain at the expense of compression.

Use a low CRF, 17 or 18. This may produce files slightly larger than the original.

Use the Grain Tune. It is designed to preserve fine detail and grain.

Set deblocking to [-2,-2]

Set GOP length low, around 50 or so.

Use 3 or 4 Ref frames

Here are the full details for the x264 Grain Tune:

- grain (psy tuning):--aq-strength 0.5 --no-dct-decimate--deadzone-inter 6 --deadzone-intra 6--deblock -2:-2 --ipratio 1.1--pbratio 1.1 --psy-rd <unset>:0.25--qcomp 0.8

Note that preserving grain and Long-GOP interframe compression are not the best of friends. One exists at the expense of the other.

TVJohn wrote on 7/17/2023, 6:08 AM

I've settled on Timeline properties same as source (DV), render as "Video for Windows/DV". The result is an.avi,no recompression needed, the file size is 22G, large but not unmanageable by todays standards.

Thanks for the suggestions.