2019-07-11, 09:09
No luck getting HDMI 1.4a frame packed 3D out of my PC DP1.2 port with external DP->HDMI adapter.
This PC with i7260U CPU (HD640 graphic): https://www.aliexpress.com/item/33007122...4c4dSCnT1I
Win10 Pro, latest updates as of today (Version 1903, OS build 18362.239), Latest Intel GPU driver (from Intel): 26.20.100.6912
Monitor is HDMI1.4a FullHD, Passive 3D (older Panasonic).
Kodi (up to 183, no special MVC builds) works fine with HDMI Frame Packed HDMI 1.4a output on the HDMI 1.4 output port of the PC.
Tried the following two DP->HDMI adapter both supposedly using Megachips 2900:
Club 3D CAC-1080: https://www.club-3d.com/en/detail/2442/d..._2.0b_hdr/
DeLock 63936: https://www.delock.com/produkte/G_63936/merkmale.html
The Club 3D was 10 Eur more expensive, the DeLock web page claims "Supports 3D displays (1080p @ 120 Hz)"
Both exposed the same behavior in windows 10:
Windows -> Settings -> Display: Display Resolution:
shows 1920 x 1080 (Recommended, 3D) - this is what i also get for HDMI 1.4a port connected directly to HDMI 1.4a TV
all other resolutions show XXX x YYY (3D) - this is highly unusual for me, this is not shown on HDMI 1.4a port/TV
Intel display control app does not provide additional info except that it allows to change display frame rate 24/50/60 for desktop
Kodi system settings do NOT allow to select "Hardware based" (aka: HDMI 1.4a frame based) in system settings.
When setting "ask me" and playing back a 3D file, kodi does as for "Preferred mode (Hardware based)", but its kinda fishy, because when choosing "Select alternate mode..." sub menu, that option is not there anymore. When selecting "Preferred mode", Kodi does not seem to do any transcoding, so a typical HSBS mkv file is shown as if no 3D decoding was done at all - seeing left/right side-by-side, and when playing a Half Top/Bottom mkv it shows top/bottom. In both cases, the TV 3D recognition triggers.
Of course, when playing Full HD 3D (MKV, block_lr, full-SBS or the like), kodi just scales down to 1080p first, aka: no Full HD 3D output, no triggering of HDMI 1.4a frame packed 3D. So, no Full HD 3D output.
No idea if there is anything else i could experiment with on these adapters. I guess i will keep the cheaper one in case i'll get around doing HDR testing later on given how the MCDP2900 claims to be HDR with DP 1.4.
I guess i can try to find external adapters using any of the other LSPCON chips discussed in prior posts.
I wonder if these adapters are actually rightfully claiming 3D, just not HDMI 1.4a 3D. E.g.: What if i had one of those "PC 3D" displays using higher frame rate output ? I have not seen discussion about this here in Kodi. Not sure if it supports it at all. Any idea ?
This PC with i7260U CPU (HD640 graphic): https://www.aliexpress.com/item/33007122...4c4dSCnT1I
Win10 Pro, latest updates as of today (Version 1903, OS build 18362.239), Latest Intel GPU driver (from Intel): 26.20.100.6912
Monitor is HDMI1.4a FullHD, Passive 3D (older Panasonic).
Kodi (up to 183, no special MVC builds) works fine with HDMI Frame Packed HDMI 1.4a output on the HDMI 1.4 output port of the PC.
Tried the following two DP->HDMI adapter both supposedly using Megachips 2900:
Club 3D CAC-1080: https://www.club-3d.com/en/detail/2442/d..._2.0b_hdr/
DeLock 63936: https://www.delock.com/produkte/G_63936/merkmale.html
The Club 3D was 10 Eur more expensive, the DeLock web page claims "Supports 3D displays (1080p @ 120 Hz)"
Both exposed the same behavior in windows 10:
Windows -> Settings -> Display: Display Resolution:
shows 1920 x 1080 (Recommended, 3D) - this is what i also get for HDMI 1.4a port connected directly to HDMI 1.4a TV
all other resolutions show XXX x YYY (3D) - this is highly unusual for me, this is not shown on HDMI 1.4a port/TV
Intel display control app does not provide additional info except that it allows to change display frame rate 24/50/60 for desktop
Kodi system settings do NOT allow to select "Hardware based" (aka: HDMI 1.4a frame based) in system settings.
When setting "ask me" and playing back a 3D file, kodi does as for "Preferred mode (Hardware based)", but its kinda fishy, because when choosing "Select alternate mode..." sub menu, that option is not there anymore. When selecting "Preferred mode", Kodi does not seem to do any transcoding, so a typical HSBS mkv file is shown as if no 3D decoding was done at all - seeing left/right side-by-side, and when playing a Half Top/Bottom mkv it shows top/bottom. In both cases, the TV 3D recognition triggers.
Of course, when playing Full HD 3D (MKV, block_lr, full-SBS or the like), kodi just scales down to 1080p first, aka: no Full HD 3D output, no triggering of HDMI 1.4a frame packed 3D. So, no Full HD 3D output.
No idea if there is anything else i could experiment with on these adapters. I guess i will keep the cheaper one in case i'll get around doing HDR testing later on given how the MCDP2900 claims to be HDR with DP 1.4.
I guess i can try to find external adapters using any of the other LSPCON chips discussed in prior posts.
I wonder if these adapters are actually rightfully claiming 3D, just not HDMI 1.4a 3D. E.g.: What if i had one of those "PC 3D" displays using higher frame rate output ? I have not seen discussion about this here in Kodi. Not sure if it supports it at all. Any idea ?
