[PATCH v12 0/6] Add Amlogic stateless H.264 video decoder for S4

[Nicolas Dufresne]

Hi,


---- Le ven., 30 oct. 2026 10:24:06 -0400 wbieganski at baylibre.com a écrit ----


> Hi,
> I tested v12 series on AQ222 board with v7.2-rc1. Firmware version:
> 'v0.4.ff.I0c83495.75444b3' build 'Thu Apr 16 18:18:55 2026'.


That reminded me, is that firmware in linux-firmware?


Nicolas

>
> RAW NV12 frames at the decoder output were visually OK across typical
> resolutions and H.264 profiles (main, high, baseline) with and without
> B-frames in the stream, also with I-frames only streams. I used Gstreamer's
> (ver. 1.26) 'v4l2slh264dec' element on Trixie with both mmap and DMA-bufs
> buffering (on the capture queue only). Input bitstreams where
> FFmpeg-generated (testsrc2 + libx264) or publicly available test videos.
>
> Decoder (and the output) remained stable with simulated (non key) frame
> drop at max resolution (1920x1088, noise generated by FFmpeg's bitstream
> filter).
>
> The performance at max resolution, tested with 'filesrc ! parsebin !
> v4l2slh264dec ! fakevideosink' pipeline was ~85 fps (fixed number of
> outputted frames divided by the total execution time).
>
> Tested-by: Wojciech Biegański
>