Dolby Vision now possible through MP4 Mux.

[daffie]

Hi RESET_9999, I have a question regarding the Chroma Weight bug on the LG models since 2022.

Just to confirm, the LG G1 from 2021 does NOT have this Chroma Weight bug ?

[razierklinge]

Hey @RESET_9999, quick question. When you're grabbing 4K WEB-DL TV releases, do you get the DV P5 or P8 versions?

I usually grab P5 to use with my Ugoos, but since Plex now has HEVC support I've been considering getting the P8 releases for friends to stream. Losing DV quality is a tough call for me, but I'm wondering if it's negligible with WEB-DL's.

[RESET_9999]

2021 or older TVs should be fine...
try it:
cmv2.9 https://drive.google.com/file/d/1MJUTgY ... drive_link
cmv4.0 https://drive.google.com/file/d/1yU3wk6 ... drive_link

[daffie]

2021 or older TVs should be fine...
try it:
cmv2.9 https://drive.google.com/file/d/1MJUTgY ... drive_link
cmv4.0 https://drive.google.com/file/d/1yU3wk6 ... drive_link

Hmm wait, this bug is only there on LLDV or Player LED ?
Because the test files are located in the ''LLDV bug'' folder...

I'm confused now because user @dysprosium mentions also this bug when using TV LED...

[RESET_9999]

there's a bug with TV-LED since 2022.
LLDV cmv2.9 devices is the original CW bug.

So they fixed the bug for LLDV with cmv4.0 devices (shield, appletv) but introduced the same bug in TV-LED since 2022 lol... Dolby is funny.

[daffie]

Haha, ok. Thanks for clarifying

[RESET_9999]

Found some other interesting difference between HDR10 and DV on my C2.

HDR10 has horrible banding in the Martian and Kingsman samples but it's clean in DV.
HDR10 also has horrible posterization in the black fade samples (quiet place) but again clean in DV. (this confirmed on LG B9 too)

files: https://drive.google.com/drive/u/1/fold ... KkCkKrH3JG

Also found a good example of the cmv2.9 black crush issue with real content:
crushed cmv2.9 (original): https://drive.google.com/file/d/16f25Yk ... drive_link
no crush cmv4.0: https://drive.google.com/file/d/1IXBaCE ... sp=sharing
no crush HDR10: https://drive.google.com/file/d/1YlS1Im ... drive_link

[staknhalo]

Hey @RESET_9999, quick question. When you're grabbing 4K WEB-DL TV releases, do you get the DV P5 or P8 versions?

I usually grab P5 to use with my Ugoos, but since Plex now has HEVC support I've been considering getting the P8 releases for friends to stream. Losing DV quality is a tough call for me, but I'm wondering if it's negligible with WEB-DL's.

If you want a 'technically better' file - go with P5, but then you (possibly, depending on use case) need a HDR10 fallback file as well for watching on non-DV devices so double file/storage space needed - or if you go p8 technically a little less better than p5 (not really much but still) but has HDR10 fallback so no double file/storage space needed for p8 - pick your poison basically

I just do p8 because of the amount of movies + shows I have I need to save storage space more than I care about what I'm losing with p5>p8

[razierklinge]

Hey @RESET_9999, quick question. When you're grabbing 4K WEB-DL TV releases, do you get the DV P5 or P8 versions?

I usually grab P5 to use with my Ugoos, but since Plex now has HEVC support I've been considering getting the P8 releases for friends to stream. Losing DV quality is a tough call for me, but I'm wondering if it's negligible with WEB-DL's.

If you want a 'technically better' file - go with P5, but then you (possibly, depending on use case) need a HDR10 fallback file as well for watching on non-DV devices so double file/storage space needed - or if you go p8 technically a little less better than p5 (not really much but still) but has HDR10 fallback so no double file/storage space needed for p8 - pick your poison basically

I just do p8 because of the amount of movies + shows I have I need to save storage space more than I care about what I'm losing with p5>p8

Yep that's what I'm leaning towards doing just for the compatibility with friends watching on Plex. I just wasn't sure how much of a quality loss it was comparing P5 vs P8 in a WEB-DL situation.

[RESET_9999]

It depends on the streaming service.

Apple/itunes= P8 is better because of the P5 static reshaping
Movies Anywhere = P5 encoding is always worse than HDR10

For the other streaming services, I do screenshot comparisons and keep the best one.

[staknhalo]

Hey @RESET_9999, quick question. When you're grabbing 4K WEB-DL TV releases, do you get the DV P5 or P8 versions?

I usually grab P5 to use with my Ugoos, but since Plex now has HEVC support I've been considering getting the P8 releases for friends to stream. Losing DV quality is a tough call for me, but I'm wondering if it's negligible with WEB-DL's.

If you want a 'technically better' file - go with P5, but then you (possibly, depending on use case) need a HDR10 fallback file as well for watching on non-DV devices so double file/storage space needed - or if you go p8 technically a little less better than p5 (not really much but still) but has HDR10 fallback so no double file/storage space needed for p8 - pick your poison basically

I just do p8 because of the amount of movies + shows I have I need to save storage space more than I care about what I'm losing with p5>p8

Yep that's what I'm leaning towards doing just for the compatibility with friends watching on Plex. I just wasn't sure how much of a quality loss it was comparing P5 vs P8 in a WEB-DL situation.

It's losing detail on color basically from what I remember, and not something you'd really notice that much if at all until watching back on a mastering/12-bit/future display

In terms of RPU effects - p5 doesn't have extra video stream data like p7 FEL, so no 'p7 FEL effects' to be had/lost. Pretty much get/retain everything going to p8 besides the ICtCp transfer info I believe.

Edit: This is factoring out other variables like sometimes p5 encodes are shipped at higher bitrates than the HDR10, or each version might be different sources/source encodes/versions and assuming brightness levels and everything match etc etc etc

[RESET_9999]

It is really noticeable. iTunes P5 colors look washed out compared to HDR10 or P8, especially red and green.
P5 is just more efficient, and it has reshaping data like FEL, so the colors are improved (unless it's from Apple), but this is not something you would notice because it exceeds our 10-bit display.
P5 will always retain the original master brightness like FEL P7, so sometimes you get brighter HDR with P5. Last Breath is a recent example:
https://slow.pics/c/KLyTQ1BP

Bitrate never means much; the only way to verify encoding quality is a screenshot comparison. For example, Apple's 24mbps bitrate is way worse than Movies Anywhere's 24mbps bitrate.

[Nscribble64]

There is 10000 responses and I ain’t reading alat so does it work?

[Nscribble64]

Like can I watch Dolby vision off of my uhd rips

[staknhalo]

Bitrate never means much; the only way to verify encoding quality is a screenshot comparison. For example, Apple's 24mbps bitrate is way worse than Movies Anywhere's 24mbps bitrate.

Disagree with that - bitrate always makes the image look noticeably sharper to me (even just in motion without having to screenshot), because of the more data, especially along lines or walls and hair and grass and stuff like that - especially now compared to some ~15Mbps HDR10 vs ~24Mbps DV5 encodes for the same title some places will pump out

Once I start getting to ~30Mbps+ HEVC I start having to freeze frame and pixel peep myself to notice any encoding differences (mainly with self encodes from UHD there cause I've only seen Sony put out ~75Mbps UHD disc level stuff with Bravia Core)