Direct Video Info
Direct Video Modes
DV1-Direct is zero buffering, sending the native 240p/480i vertical resolution and then horizontal resolution is multiplied to meet HDMI minimum clock frequency requirements.
DV1-Passthru* uses the GEM/Digital scaler to regenerate a 240p/480i vertical resolution and buffer in about 4 lines of video to stabilize the video timing.
FX-Direct packages the native resolution in a higher standard resolution output frame (1280x720p) that is more compatible with HDMI switches/matrixes/splitters and other equipment.
* DV1-Passthru mode requires 3.9.46.4 or greater.
Direct Video Modes Lag or Latency
DV1-Direct = zero lag
DV1-Passthru = line doubler
FX-Direct = typical scaler line latency
Direct Video Modes Preferred Options Table
(Last Updated 01/29/2025)
The below chart assumes the PixelFX device is running directly to the upscaler. However, if an HDMI switch/matrix/splitter is between the device and upscaler, then DV1-Passthru or FX-Direct may be required. Check the HDMI switch reference guide for compatibility. (WIP)
Note:
- The chart only applies to PixelFX devices. For direct video with MiSTer and Morph 4K, see MiSTer FPGA.
- PS1Digital and PS1 GEM may have issues with DV1-Direct through certain HDMI devices since the horizontal sync is changing position from line-to-line and confuses almost all HDMI receivers.
- DCDigital refers to DCDigital HW2 since DCHDMI/DCDigital HW1 is not applicable. N64Digital covers both HW1 (RGB/YPbPr) and HW2 (RGB).
- 3DO GEM has DV1-Direct mode permanently disabled because the direct raw video of the 3DO has a too low pixel clock i.e. over half of what's needed for HDMI. Plus some video chips have a completely flawed sync signals (only 1 pixel clock cycle wide).
- 3DO GEM's DV1-Passthru mode outputs both 640x480i and 320x240p depending on the I/P convert setting (interlaced/progressive).
- With regards to Source Product Description (SPD) InfoFrame Format for DV1-Direct and DV1-Passthru modes, all Digitals have the
[PS1/N64/DC]Digital
label (example: PS1Digital) and all Retro GEMs have theRetroGEM [PS1/N64/PS2/DC/3DO]
label (example: RetroGEM PS1). - FX-Direct mode is not presently supported on the RetroTINK-4K and OSSC Pro. The Vendor Specific InfoFrame (VSIF) for FX-Direct mode can be found here.
- PixelFX devices dynamically change their pixel de-repetition values when their on-screen menus are opened.
- OSSC Pro on firmware 0.77 or later should also support automatic pixel de-repetition when using the on screen menus.
- OSSC Pro on 0.76 or earlier firmwares does not support automatic pixel de-repetition and so the OSD may appear corrupted. As a workaround, manually change Pixel de-repetition on the OSSC Pro (under AV4 video in opt.) to 1, make the required changes to your PixelFX product and then exit the menu. Be sure to set Pixel de-repetition back to Auto mode on the OSSC Pro once you are finished.
Key:
Symbol | Meaning |
π | Recommended Choice |
β | Supported |
β | Not Supported |
π€· | Not Tested |
Upscalers and Systems:
Video Mode | PixelFX Device | Morph 4K | RetroTINK-4K | OSSC Pro | Reported By/Notes |
---|---|---|---|---|---|
DV1-Direct | PS1Digital | β | β | β | miba (OSSC Pro) |
N64Digital | β | π | β | ||
DCDigital | β | π | β | ||
PS1 GEM | β | β | β | BuckoA51 (Works on OSSC Pro scaler mode, has warped top line) | |
PS2 GEM | β | π | β | ||
N64 GEM | β | π | β | ||
DC GEM | β | π | β | ||
3DO GEM | β | β | β | Disabled per chriz2600 | |
DV1-Passthru | PS1Digital | π | π | π | pelvicthrustman (PS1D RT4K) / BuckoA51 (OSSC Pro) |
N64Digital | π | β | β | miba (OSSC Pro) | |
DCDigital | π | β | π€· | ||
PS1 GEM | π | π | π | BuckoA51 (OSSC Pro) | |
PS2 GEM | π | β | π€· | ||
N64 GEM | π | β | π€· | ||
DC GEM | π | β | π€· | ||
3DO GEM | π | π | π€· | ||
FX-Direct | PS1Digital | β | β | β | |
N64Digital | β | β | β | ||
DCDigital | β | β | β | ||
PS1 GEM | β | β | β | ||
PS2 GEM | β | β | β | ||
N64 GEM | β | β | β | ||
DC GEM | β | β | β | ||
3DO GEM | β | β | β |