Gentle ping, does anyone have an idea? Sincerely, -Hiro On Wed, Jul 21, 2021 at 7:22 PM Hirokazu Honda <hiroh@xxxxxxxxxxxx> wrote: > > Hi, > > There are V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING controls in > V4L2 extended codec controls. [1] > There are various layer structures. For example, the typical 3 layer > structure is shown in https://www.w3.org/TR/webrtc-svc/#L1T3*. > The document doesn't state the details about the layer structure that > will be produced by a driver with the control. > Is the layer structure up to a driver? Or must a driver produce a > predetermined layer structure? > > [1] https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-codec.html?highlight=V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING > > Best Regards, > -Hiro
