Using DMABUF to obtain zero copy with omxh264enc

Guillaume Desmottes guillaume.desmottes at
Tue Jun 30 12:46:08 UTC 2020


appsrc does not support dmabuf but you should be able to capture from SDI
using v4l2src directly and so don't need to use appsrc here.


On 30/06/2020 14:37, JK wrote:
> Hi
> I  need to design a pipeline to be run on the Zynq Ultrascale+ MPSoc
> platform which basically has a camera src connected via SDI input.
> I will be using the appsrc such that I fetch the frames from SDI path and
> push to the appsrc queue, the incoming frame is YUV420/YUV422 10bit/8bit,
> (NV12/NV12_10LE32/NV16/NV16_10LE32).
> Is to possible to use the dmabuf feature with reference to the v4l2src
> plugin which exports the dmabuf fd and wraps in the GstMemory passing to
> omxh264enc which then import this fd.
> I Observed that the current omxh264enc does a copy of incoming frame data to
> the omx layer allocated buffer, we need 4K @ 60fps, so to optimize the
> pipeline we wish to implement the zero copy pipeline.
> Thanks
> --
> Sent from:
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at

More information about the gstreamer-devel mailing list