How do I pass gstreamer a NvBuffer as a source for the omxh265enc

[moezruo6]

I’m currently pulling frames off a camera using Argus and have created a NvBuffer using this below:

EGLStream::NV::IImageNativeBuffer* const iNativeBuffer = Argus::interface_cast<EGLStream::NV::IImageNativeBuffer>(image);
                const int fd = iNativeBuffer->createNvBuffer(
                        _iCameraSensorMode->getResolution(),
                        NvBufferColorFormat_NV12,
                        NvBufferLayout_Pitch
                        );

Given the fileDescriptor of the NvBuffer, how do I pass that data into gstreamer to use as my source to my RTSP pipeline? I have setup the source caps to accept NVVM NV12 images such as:

    /* set the caps on the source */
    GstCaps *caps = gst_caps_new_simple(
            "video/x-raw(memory:NVMM)",
            "format", G_TYPE_STRING, "NV12",
            "width", G_TYPE_INT, _config_width,
            "height", G_TYPE_INT, _config_height,
            "framerate", GST_TYPE_FRACTION, _config_fps, 1,
            NULL);

How I currently push data into gstreamer is that I allocate a buffer of the given image byte size and copy it like:

buffer = gst_buffer_new_allocate(NULL, dataSize, NULL);
if (gst_buffer_map(buffer, &map, GST_MAP_READ))
{
    memcpy((guchar *) map.data, (guchar *) data, dataSize);
    gst_buffer_unmap(buffer, &map);

    gst_frame_buffer_info_meta = (GstFrameBufferInfoMeta *) gst_buffer_add_meta(buffer,
                                                                                GST_BUFFER_INFO_META_INFO,
                                                                                NULL);
    // Add my metadata

    static GstClockTime timestamp = 0;

    GST_BUFFER_PTS (buffer) = timestamp;
    GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale_int(1, GST_SECOND, 30);
    timestamp += GST_BUFFER_DURATION (buffer);

    g_signal_emit_by_name((GstAppSrc *) app.appsrc, "push-buffer", buffer, &ret);
}

But I want to change that so my gstreamer source can accept the NvBuffer and then pass it straight into the omxh265enc.

[DaneLLL]

Hi,
You can use appsrc plugin and wrap the NvBuffer into NVMM buffer in the plugin. We have deprecated omx plugins and please use nvv4l2h265enc.

If you use Jetpack 4 release, please refer to this sample for using appsrc:
Opencv gpu mat into GStreamer without downloading to cpu - #15 by DaneLLL