Dolby Vision now possible through MP4 Mux.

[sofakng]

Can you check the L2 trim in that latest file? (RPU p8.1 L1.L2.L3.L8_cmv40.mp4) It doesn't appear to be working on internal player or Shield TV with LG C1.

The previous file (RPU p8.1 L1.L2_cmv29) does have working L2 trim on Shield TV and internal player.

The other levels (L1, L3, and L8) are all working correctly on Shield TV and internal player, but I'm not sure I can tell a difference in the L8 hue/saturation pictures.

[RESET_9999]

Can you check the L2 trim in that latest file? (RPU p8.1 L1.L2.L3.L8_cmv40.mp4) It doesn't appear to be working on internal player or Shield TV with LG C1.

The previous file (RPU p8.1 L1.L2_cmv29) does have working L2 trim on Shield TV and internal player.

The other levels (L1, L3, and L8) are all working correctly on Shield TV and internal player, but I'm not sure I can tell a difference in the L8 hue/saturation pictures.

yes this is expected. L8 replaces L2 in CMv4.0.

both the player and TV must support cmv4.0 to get L8 response.

What does this do on our TV and UHD BD players? Thanks

on the TV and shield, cmv4.0 works as normal L1 + L8
on the bluray player , it behaves the same as cmv2.9 because it doesnt support 4.0.

[chros]

Can you check the L2 trim in that latest file? (RPU p8.1 L1.L2.L3.L8_cmv40.mp4) It doesn't appear to be working on internal player or Shield TV with LG C1.

The previous file (RPU p8.1 L1.L2_cmv29) does have working L2 trim on Shield TV and internal player.

The other levels (L1, L3, and L8) are all working correctly on Shield TV and internal player, but I'm not sure I can tell a difference in the L8 hue/saturation pictures.

Nice, thanks for checking!
Don't worry about L2 in cmv4.0, it shouldn't do anything with cmv4.0 devices when L8 is present, and exactly that's what you saw.
https://professionalsupport.dolby.com/s ... uage=en_US
So, in all, your C1 has cmv4.0, just as C2 and that's why we experience the same bug!

Edit: Reset was faster, and thanks for the explanation!

[sofakng]

Well that's depressing.

I just purchased my LG C1 77" less than two weeks ago.

However, I've learned a ton from you guys on the forum. I can't thank you guys enough for researching this and helping us out!

Is there a list of CMv4.0 players? It looks like the Shield TV supports it but obviously has the red crush issue and doesn't support FEL.

[RESET_9999]

interestingly and kind of a good news, @manix said he got an L8 response on his CX and no L1 bug on the x700... mmm
so there's something going on with the C1/C2

[quietvoid]

Here's a higher brightness L1 test video: https://0x0.st/ojA5.mkv
The image is a lot brighter than what the OLEDs are capable of, and the metadata reflects that.

So we have MDL at min 0.0050, max 4000 nits.
MaxCLL 5640 nits.

This works well on my FireTV Stick 4K Max + LG C2, every change in L1 has an effect similar to the internal player.
Let me know if it makes any difference for UHD BD players.

The previous test was at max 1000 nits, so it's possible some bypassing might happen if the player looks at the EDID, or the TV looks at some other metadata.
I'll have to test modifying the L6 metadata to see if it makes any difference.

In the end, it seems that HDMI input players may just be tracking PQ when *some* metadata is within the capabilities of the display, instead of clipping according to L1 like the internal player.

[RESET_9999]

but the SM clip I did with madvr is 10 000nits and the L1 still doesnt work properly. Did you try it on your firestick?
and why the shield is not affected?

EDIT:
I just tried your file and the same difference is there, it's just less obvious.

I'll do some tests with real movies.

[Poker354]

I’m not sure I’m experiencing this bug. LG CX with Sony X700 and Shield Pro 2019. Testing the videos back and forth (ts on Sony and mp4 on Shield) I could easily see the changes on both. The shield might look slightly better but I easily see them as well on the x700.

X700

https://imgur.com/a/0kYGI5Z/all

Shield

https://imgur.com/a/CIEGd5f/all

yep, CX looks ok. lucky you

please try the cmv4.0 version on your Shield(or TV internal player) and tell us if you get L8 reaction.
https://drive.google.com/file/d/1tU3VLC ... sp=sharing

Both the Shield and TV show strong reaction in the L8 in the trims, chroma weight, saturation, clip trim, I don’t really notice anything happening in the vector fields.

[quietvoid]

but the SM clip I did with madvr is 10 000nits and the L1 still doesnt work properly. Did you try it on your firestick?
and why the shield is not affected?

The "RPU.out.of.sync.p8 (madvr generated, no L2).ts" clip works fine on the stick, the changes are noticeable.

I just tested playing with MDL and it seems that tone mapping targets "source_max_pq" when there's no L1, but otherwise L6 makes no difference.

[quietvoid]

PS: There's a bug with the latest 1000 nits trim metadata test file, where the CM v2.9 version has the first 3 seconds with CM v4.0 metadata instead.
This is a revision: https://0x0.st/ojmX.mkv, but it made no difference for me at least.

[RESET_9999]

The "RPU.out.of.sync.p8 (madvr generated, no L2).ts" clip works fine on the stick, the changes are noticeable.
I just tested playing with MDL and it seems that tone mapping targets "source_max_pq" when there's no L1, but otherwise L6 makes no difference.

Well I guess the firestick is not affected by this bug because it's night and day the difference on the x800 + C2 ( EG the horse scene) but yes, some luminance change looks similar.

PS: There's a bug with the latest 1000 nits trim metadata test file, where the CM v2.9 version has the first 3 seconds with CM v4.0 metadata instead.
This is a revision: https://0x0.st/ojmX.mkv, but it made no difference for me at least.

thanks , will try

[RESET_9999]

yep as soon as L1 is alone, big difference.

https://slow.pics/c/uF3dr3YN

DSLR camera settings locked

[quietvoid]

yep as soon as L1 is alone, big difference.

https://slow.pics/c/uF3dr3YN

DSLR camera settings locked

So it doesn't react when there's L2 present only?
The TV only looks dimmer in the photos, but the clipping is the same..

That's weird. The L2 is all set to 2048, though. I think usually real metadata has one of them at like 2049.
I doubt it would work, though.

Another thing might be that there's L2 up to 4000 nits, so maybe that does something too.

[RESET_9999]

So it doesn't react when there's L2 present only?
The TV only looks dimmer in the photos, but the clipping is the same..

There's a big different too when l2 is present but I think it's not as obvious as in the L1(no L2) scene. or maybe im dreaming
with the internal player, the L1 (no L2) scene is a lot brighter and more clipped than the x800m2. Roughly the same difference as in your first 1000nits pattern.

[quietvoid]

There's a big different too when l2 is present but I think it's not as obvious as in the L1(no L2) scene. or maybe im dreaming
with the internal player, the L1 (no L2) scene is a lot brighter and more clipped than the x800m2. Roughly the same difference as in your first 1000nits pattern.

Okay, I don't really understand what the issue is anymore.
I thought there was little visible change on the Blu-ray player. Now it sounds more like the TV is just brighter.

I can't easily judge the brightness by eye, but the C2 does clip more than the FireTV Stick 4K Max for me.

The stick shows more blue at the edges of the water splash, while the TV internal player is almost just white.
So the TV is probably brighter too.

To me this isn't a significant issue, as I've always assumed the internal player to be brighter and "more accurate".