here are the tests done, done with Vegas Pro 19 last build. I use only intel iGpu (intel graphics 630 for encoding. all videos are in constant bitrate. Audio output 44.1khz 320kbs AAC.
Gear : Cubase PRo 11 , 32Gb DDR4, Z270 M-itx, Cpu intel i7-7700, Palit 1050ti KalmX. Screen : Full HD 24" AOC HDMI, Dpi 100%.
Source (Vegas Pro) : Magix H264 29.97 10mbs
Cubase Project FrameRate : 59.94
Result : Works ! (ahah lol the b****…)
Source (Vegas Pro) : Magix H264 29.97 10mbs AAC 320kbs
Cubase Project FrameRate : 29.97
Result : Works !
Source (Vegas Pro) : Magix H265 29.97 10Mbs AAC 320kbs :
Cubase : Import not working, seems to not be compatible with H265
Source (Vegas Pro) : Prores 422 29.97
Cubase Project FrameRate : 29.97
Result : Works !
Source (Vegas Pro) : Prores 422 29.97
Cubase Project FrameRate : 59.94
Result : Works !
Source (Vegas Pro) : Sony H264 14Mbs CBR 59.94
Cubase Project FrameRate : 59.94
Result : Doesn’t Work. stop playing after 4 seconds of playback. so it’s not codec related with H264.
Source (Vegas Pro) : Sony H264 14Mbs CBR 59.94
Cubase Project FrameRate : 29.97
Result : Work.
Source (Vegas Pro) : Prores 422 59.94
Cubase Project FrameRate : 29.97
Result : Work.
Source (Vegas Pro) : Prores 422 59.94
Cubase Project FrameRate : 59.94
Result : Work.
Source (Vegas Pro) : Magix H264 59.94
Cubase Project FrameRate : 59.94
Result : Doesn’t Work, stop playing, play, stop etc…
Source (Vegas Pro) : Magix H264 59.94
Cubase Project FrameRate : 29.97
Result : Works
Result : H264 (no matter the codec) at 59.94 doesn’t work in cubase, except by using Prores (like you said).
Now from other source :
AVCHD interlaced 25fps Qicktime Mov : Works in 25 and 50fps, project
M2ts file : can’t import, not compatible.
Go Pro 50fps AVC1 in cubase 50fps project = NOT WORKING !!
Go Pro 50fps AVC1 in cubase 25fps project = WORKING !!
Conclusion : it seems it’s not vegas pro related. Pro res work no matter bitrate and project, but it seems cubase has issues displaying H264 /AVC/AVC1 50 and 59.94fps file in 50 and 59.94 project.
if project is reduced by 2 (25 and 29.97fps), the file is playing.
doesn’t matter the bitrate (Mbs) as the prores or the AC1 Gopro has a a crazy one !
so it’s seems it’s related to H264 Mp.4 + doubleframe rate (50 or 59.94)