I know we seem to have been relegated here in the DR thread but.... Can anyone point in the direction that describes what resolutions will be passed through and which won't using match framerate and resolution? 480p/576p is not being passed through, some (most) 720p also, and even some 1080p content...not sure if it's related to the resolution/aspect ratio/framerate of the file. Where the res is not being passed through it stays at 2160p but changes the framerate to match the content. @Markswift2003 any ideas/pointers?
It depends on two things - the HDMI spec and the EDID. For example, in the HDMI spec, 720x480 is only supported interlaced at 60Hz, 720x576 is interlaced at 50Hz and 1280x720 is progressive but only at 50/60Hz. So if you get 480, 576 or 720 files at 23.976fps, they have to be scaled to 1080p to show at the correct framerate. It gets further complicated by non standard aspect ratios where the horizontal resolution is used to define the mode. Available resolutions and refresh rates are further defined in the EDID (which reflects the display's capabilities).
@Markswift2003 Hi Mark, sorry to be a pain, but why wouldn't this file passthrough at 1080p? Is Zidoo reading the horizontal or vertical resolution to determine what action to take? This file is in 1.37.1 aspect ration (4.3 roughly speaking). I would have thought it SHOULD take it's cue from the vertical resolution, not the horizontal. Video ID/String : 1 Format/String : HEVC Format/Info : High Efficiency Video Coding Format_Profile : Main 10@L4@Main CodecID : V_MPEGH/ISO/HEVC Duration/String : 1 h 36 min BitRate/String : 8 497 kb/s Width/String : 1 464 pixels Height/String : 1 080 pixels DisplayAspectRatio/String : 4:3 FrameRate_Mode/String : Constant FrameRate/String : 23.976 (24000/1001) FPS ColorSpace : YUV ChromaSubsampling/String : 4:2:0 BitDepth/String : 10 bits Bits-(Pixel*Frame) : 0.224 Default/String : Yes Forced/String : No colour_range : Limited colour_primaries : BT.709 transfer_characteristics : BT.709 matrix_coefficients : BT.709 UPDATE: Just checked 1080p 1.33.1 and 1.66.1 aspect ratio files, and same as above - it outputs 2160p rather than 1080p. So it seems, as an example, any 1.33.1 file in 480p/720p/1080p is outputted at 2160p. I can't see how this is not a bug personally. Thoughts?
Yes I agree this should output at 1080p. I seem to remember tacking this years ago with the devs. The logic is based on horizontal resolution because of cropped content so should be something like: If x <= 720 output in SD if frame rate/scan type allows else next available resolution Else If x <= 1280 output in 720p if frame rate allows else next available resolution Else If x <= 1920 output in 1080p Else output in 2160p Or something I forget where the conversation ended but honestly trying to get this sorted while we have so many fundamental issues with the BPD SOC will be like flying to the moon. At the end of the day, you're never actually watching in 1080p - if you're watching non-4K on a 4K TV, something has to upscale, either the TV or the Zidoo or the amp. The TV is often the worst at it and the Zidoo is very good. Personally I only match frame rate - I output everything in 4K.
