Vita:UDCD Video Streaming Plugin

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Revision as of 02:57, 8 August 2022 by Derf (talk | contribs) (Further cleanup)
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The UDCD Video streaming plugin is a kernel plugin that allows you to stream the Vita screen over a USB cable. The Vita appears as a USB class camera and is accessible from VLC and OBS on a PC or on any other device that supports the USB Video class (such as Androids).

The plugin uses the SceUdcd module of the PSVita OS to setup the necessary USB descriptors to simulate and behave as an USB Video class device, similar to a webcam or a USB video capture card. The hardware color space converter of the PSVita's SoC is used to perform the conversion to the destination pixel format; then the USB controller directly performs a DMA transfer from the physical address of the resulting converted framebuffer, saving CPU usage and and reducing power consumption.

Exclamation-circle-fill.svgThe plugin doesn't stream audio. For that, use a 3.5mm jack to jack adapter (a ferrite bead might help reduce the electromagnetic noise).


Supported Formats and Resolutions

  • 960x544 @ 30 FPS and (less than) 60 FPS
  • 896x504 @ 30 FPS and (almost) 60 FPS
  • 864x488 @ 30 FPS and 60 FPS
  • 480x272 @ 30 FPS and 60 FPS
  • 1280x720 @ 30 FPS

Download and installation

Download:

Compilation

  • vitasdk is needed.

Installation:

  1. Copy udcd_uvc.skprx to your PSVita
  2. Add udcd_uvc.skprx to taiHEN's config (ur0:/tai/config.txt or ux0:/tai/config.txt): 
    *KERNEL
    

    ur0:tai/udcd_uvc.skprx
  3. Reboot your PSVita.

Troubleshooting

If the video looks glitched, try to change the video player configuration to use the NV12 format or switch to another player (like PotPlayer or OBS). If the colors look wrong, set color range to full and color space to BT.601 (Rec. 601).

If you use Windows 10 you might have to change the Camera access permissions on the Privacy Settings.

On Linux, try using mplayer (mplayer tv:// -tv driver=v4l2:device=/dev/videoX:width=960:height=544).

Audio noise fix:

  • Disable USB power supply (Settings > System)
Exclamation-circle-fill.svgRemember that if anything goes wrong (like the Vita not booting), you can always press L at boot to skip plugin loading.


Turning the screen off during streaming

These 2 modified projects are not on GitHub and are quite hard to find. They are included in Autoplugin 2

  • udcd_uvc OLED - For OLED screens model 1000 - Turns the screen black, turning it off
  • udcd_uvc LCD - For LCD screens model 2000+ - Turns the screen off while streaming
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