Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.


Go Back   Doom9's Forum > Video Encoding > High Efficiency Video Coding (HEVC)

Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old 5th April 2021, 11:01   #23  |  Link
Registered User
Join Date: Oct 2020
Location: France
Posts: 7
Thanks a lot, dear quietvoid, for having replied quickly to me.
I'm trying again to post you a reply - few days after my first attempt failed (supposedly due to moderation filtering?)

Originally Posted by quietvoid View Post
There's no simple way to use the tool for cropped video, you have to edit the code.
Erf... That is a matter for me: I'm not competent in programming neither compiling (and a bit allergic to it actually).
Is it abusive to ask you, theweasley or anyone else able to compile with this cargo thing, a "crop able" version of your DoVi tool?

Originally Posted by quietvoid View Post
Also, using the RPU with x265 to transcode might end up with some desyncs due to the way x265 is inserting the metadata back.
See https://github.com/quietvoid/dovi_to...ment-803652617
I'm also having similar issues as your topic above, with "red flash" insertion before a fade out during the start credits (I'm working with a 2600 frames extract of a movie remux).
I've also detected a magenta flash on a white area (a reflection zone) during a real movie part.

Originally Posted by quietvoid View Post
Unfortunately I don't think there is a solution for that, other than inserting the metadata after transcoding.
What do you mean by that exactly ?
To mux it with the yusesope tool or via mkvmerge + MakeMKV ? But how would you mux a RPU.bin with an hevc file ?

Originally Posted by quietvoid View Post
For HDR10+ the same desync issue is present.
For cropped video, the metadata is supposedly resolution agnostic and hopefully the analysis is done on the active image area only.
So it should work in theory,
From an article I found about Metadata Levels on the Dolby Professional Support Knowledge, it is written "Ratio of canvas and image (active area)" as part of the Level 0.
This would mean the same as you mentionned for the HDR10+ theorical implementation, on the active area... and therefore no need to have a "crop-able" version?

Originally Posted by quietvoid View Post
I'm curious to know how streaming services make use of x265's RPU insertion. There has to be some predicting the transcode's decoding order somehow, to make sure the RPU is synced throughout.
Though I've had artifacts with Dolby Vision on Netflix as well, so maybe they don't bother syncing either.
Probably someone knowledgeable in the video streaming domain, such as benwaggoner, would give you answer or at least some hints.
Ryzen 3950X w/ 64 Gb RAM on Win10 as transcoding rig (and daily use)
Panasonic HZ1000 (Oled HDR10+/DoVi TV) & Sony MDR-HW700DS (Audio decoder and headset spacialization)
telemO is offline   Reply With Quote

dolby vision, dovi, hdr, rpu, x265

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +1. The time now is 06:22.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.