~/talk

Stateless V4L2 Video Encoding

on YouTube 33m
Talkat Embedded Linux Conference (ELC) @ EOSS 2023 · 2023-06-27..06-30· [linux-and-operating-systems]

speaker

name:Andrzej Pietrasiewicz
links:none on file

resources

video:https://youtu.be/lSg_bwD-Jhw
slides:none on file

summary

Explains a working path to upstream stateless V4L2 encoding by showing VP8 stateless encoder on RK3399 tested with Paul’s userspace code, a kernel RFC/patch series, and a request‑API workflow that binds per‑frame controls to buffers. Describes the implemented per‑frame constant QP rate control (a simple P/PID‑style loop), kernel-side frame‑header assembly to read hardware symbol counters, and the upstream hurdle of the kernel’s two‑drivers rule for new uAPIs.

AI-written summary · about

chapters (4)

  1. 0:00Start
  2. 5:09Reference frames
  3. 18:46Rate control strategies
  4. 22:53Media Summit 26th Jun 2023 2 drivers rule?

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