Hi,
I'm the original poster of this problem :
https://community.adobe.com/t5/premiere-pro/premiere-pro-14-3-2-gt-14-4-samsung-galaxy-book-12-lags-...
I discovered the severe lag of PremierePro 14.4 (having an impact on the whole Win10 2004 system) is caused by editing the Avid DNxHR HQX video format. And that did NOT occur on PremierePro 14.3.2 that worked perfectly fine with my DNxHR HQX UHD footage.
Accidentally I started to edit a PreRes HQ 422 on 14.4 and everything worked fine. As fast as 14.3.2, as it should be.
14.4 must have problems editing the Avid DNxHR video format.
These are the specs of two of my files :
DNxHR HQX [working bad on 14.4]
Format : VC-3
Commercial name : DNxHR HQX
Format version : Version 3
Format profile : RI@HQX
Codec ID : AVdh
Codec ID/Info : Avid DNxHR
Duration : 27 s 711 ms
Bit rate mode : Constant
Bit rate : 1 746 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 10 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 3.512
Stream size : 5.63 GiB (100%)
----------------
ProRes HQ 422 [working fine on 14.4]
Format : ProRes
Format version : Version 0
Format profile : 422
Codec ID : apcn
Duration : 5 min 52 s
Bit rate mode : Variable
Bit rate : 1 018 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:2
Scan type : Progressive
Bits/(Pixel*Frame) : 2.047
Stream size : 41.7 GiB (100%)
Thanks for your help,
Gianluca
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