On Sat, Dec 18, 2021 at 1:52 AM Nicolas Dufresne [off-list ref] wrote:

Le vendredi 17 décembre 2021 à 09:26 -0800, Tim Harvey a écrit :

quoted

I'm not clear if anyone is working on IMX8MM VPU H1 support. You had
mentioned that some support [1] and [2] can be derived from the RK3288
using the Google ChromeOS method (a v4l2 plugin that simulates in
userspace a stateful encoder). I'm not sure if this is worth pursuing
if others are working on stateless encode support in kernel and
gstreamer.

My colleagues started last week the project of crafting mainline stateless
encoder uAPI. This is too early. In older project, we have had good success with
the emulated stateful encoder. It is of course quite limited, but works in
gstreamer, ffmpeg and chromium. It is also likely safer compared to the vendor
provided driver.

If people still want to play with the old emulated stateful encoder, there
is a forward-ported version in the ChromeOS v5.10 kernel now. Note that
RK3288 (H1) support is untested. Also, RK3288 and RK3399 require different
versions of the userspace plugin. And the RK3288 version might require some
updates to add SELECTION API support.


ChenYu

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