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u/PulzWave

r/WLED r/DenonPrime r/obs
Custom 3D printed WLED logo beat synced to my DJ gear
▲ 22 r/DenonPrime+1 crossposts

Custom 3D printed WLED logo beat synced to my DJ gear

Soldering is not my expertise at all, but with help of a few family members I finished the project.

400 individually addressable RGB LEDs, 5V WS2812B. Turns out I will only need 15% of its brightness, or else it’ll be waaaay too bright.

The whole system is controlled by DDP, connecting the DJ metadata to the Python script controlling the data. The DJ data is aware of the beatgrid and tempo etc, which made it possible to sync the logo in the way that it does.

I’m really happy with the end result.

Feel free to ask questions!

youtu.be
u/PulzWave — 14 days ago
▲ 1 r/obs

YouTube HDR streaming color issue

I’ve recently been experimenting with HDR live streaming on YouTube, which feels like completely uncharted territory right now. Only a few creators are pushing HDR live content, and I feel the software ecosystem has only just caught up. I'm using the latest versions to (try to) make this work. Specifically OBS Studio's new "Compose SDR to HDR" effect filter, as well as DroidCam's recent HDR video support for mobile camera feeds.

On HDR-capable displays, the result is fantastic. However, non-HDR viewers on YouTube are seeing an oversaturated mess. The Twitch stream (which is non-HDR) looks fine.

I am aware of HDR tone-mapping and took a lot of effort perfecting it. And in my local recording, when I disable HDR of my monitor, it looks absolutely fine, as you can see on the screenshot compilation attached.

Interestingly, the VOD corrects itself after ~24 hours. Once YouTube finishes fully processing the stream, the SDR version looks great. This suggests YouTube handles the tone-mapping properly post-stream, but struggles with the live SDR fallback pipeline.

Is this a known limitation of YouTube's live HDR ingestion? As of my understanding I'm following YouTube's recommendations of HDR videos.

Thinking out loud, an idea could be that would need to find a way to stream to YouTube via HLS..

OBS streaming settings:

  • OBS Studio 32.2.1
  • Main streaming target is Twitch. This means that YouTube streaming is using RTMP as Aitum does not support HLS.
  • Enhanced Broadcasting is enabled (because I also stream dual format to Twitch)
  • This greys out all advanced options for the main canvas stream.

Using Aitum Multistream (1.0.8) I added a vertical canvas with the following settings

  • NVIDIA HVENC HEVC
  • Constant bitrate, 20000 kbps, P4 medium quality, tuning high quality, Two passes, profile: main10

My OBS advanced settings:

  • Color Format: P010 (10-bit, 4:2:0, 2 planes)
  • Color Space: Rec 2100 (HLG)
  • Color Range: Limited (also tried Full, no difference)
  • SDR White Level: 350 nits
  • HDR Nominal Peak Level: 1000 nits

Local recording codec info according to VLC Player:

  • Decoded Format: Planar 4:2:0 YUV 10-bit LE
  • Color primaries: ITU-R BT.2020
  • Color transfer function: Hybrid Log-Gamma
  • Color Space: ITU-R BT.2020 Range

Using the latest version of DroidCam OBS plugin, with the option "Capture HDR when using HEVC (Rec. 2100 HLG, if supported)" enabled.

For all non-HDR sources such as my overlays, I have added the new "Compose SDR to HDR" effect filter.

For both of my HDR sources (iPhone 17 and Pixel 7) I have enabled the HDR Tone Mapping effect filter

Oh and finally, why am I persisted on streaming in HDR? Well... I have a lot of lighting (RGB LEDS, laser, moving heads), 100% synced to the music. Not only on BPM, but also on phase (intro, break, main, build up, drops, etc) which looks amazing in HDR. Now that I've seen the HDR footage watching it back in non-HDR feels kinda dull.

See screenshot compilation here: https://imgur.com/a/MwcT2po

u/PulzWave — 16 days ago