Gstreamer jetson xavier nx

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
1

Why the following command doesn’t work on xavier nx ? the X86 computer system is run well
gst-launch-1.0 playbin uri=https://www.freedesktop.org/software/gstreamer-sdk/data/media/sintel_trailer-480p.webm

3

Hi,
It looks like https is not supported in gstreamer 1.14.5. You may try Jetpack 5.0.2.

4

ErrorCode::ErrorCodeType CameraH264HardwareDecoder::CreateGstDecodePipeline()
{
GstStateChangeReturn ret;

/* Create the elements */
m_gstAppSrc = gst_element_factory_make("appsrc", "dji_video_stream_src");
m_gstQueue = gst_element_factory_make("queue", "queue");
m_gstH264Parse = gst_element_factory_make("h264parse", "h264parse");
//m_gstDecode = gst_element_factory_make("omxh264dec", "decode");
    m_gstDecode = gst_element_factory_make("nvv4l2decoder", "decode");
//m_gstconv = gst_element_factory_make("nvvidconv","conv");
m_gstAppSink = gst_element_factory_make("appsink", "sink");
//m_gstAppSink = gst_element_factory_make("nvoverlaysink", "sink");
//m_gstAppSink = gst_element_factory_make("nveglglessink", "sink");
 
/* Create the empty pipeline */
m_gstPipeline = gst_pipeline_new("dji_video_stream_decode_pipeline");

if (!m_gstPipeline || !m_gstAppSrc || !m_gstQueue || !m_gstH264Parse || !m_gstDecode || 
    !m_gstAppSink) {
	DERROR("Not all gstreamer elements could be created.");
	return ErrorCode::SYSTEM_ERROR;
}
//gst_caps_new_simple("video/x-raw","format",G_TYPE_STRING,"RGB16");
/* Build the pipeline */
gst_bin_add_many(GST_BIN (m_gstPipeline), m_gstAppSrc, m_gstQueue, m_gstH264Parse, m_gstDecode,
                 m_gstAppSink, NULL);
if (gst_element_link_many(m_gstAppSrc, m_gstQueue, m_gstH264Parse, m_gstDecode, m_gstAppSink,
                          NULL) != TRUE) {
	DERROR("Gstreamer elements could not be linked.");
	gst_object_unref(m_gstPipeline);
	return ErrorCode::SYSTEM_ERROR;
}

//appsrc config
g_object_set(m_gstAppSrc,
			"stream-type", GST_APP_STREAM_TYPE_STREAM,
			"format", GST_FORMAT_TIME,
			"do-timestamp", TRUE,
			"is-live", TRUE,
			"block", FALSE,
			NULL);

//decode disable dpb for low lantency
g_object_set(m_gstDecode, "disable-dpb", TRUE, NULL);
g_object_set(m_gstDecode, "enable-frame-type-reporting", 1, NULL);

// appsink config
/* max queue buffer numbers */
gst_app_sink_set_max_buffers(GST_APP_SINK(m_gstAppSink), 100);
/* drop old buffers when queue is filled */
gst_app_sink_set_drop(GST_APP_SINK(m_gstAppSink), true);

/* Start playing */
ret = gst_element_set_state(m_gstPipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE) {
	DERROR("Unable to set the pipeline to the playing state.");
	gst_object_unref(m_gstPipeline);
	return ErrorCode::SYSTEM_ERROR;
}
// create get frame task
m_exitGetNewFrameTask = false;
m_IsGetNewFrameTaskLive = false;
OsdkOsal_TaskCreate(&m_getNewFrameTaskHandle, GetNewFrameTask, 4096, this);

return ErrorCode::SUCCESS;

}
void* GetNewFrameTask(void *arg)
{
CameraH264HardwareDecoder *s_cameraH264HardwareDecoder = (CameraH264HardwareDecoder *)arg;
GstStateChangeReturn ret;
T_Image image;
GstSample *gstImageSample;
GstBuffer *gstImageBuffer;
GstCaps *caps;
GstStructure *gstStructure;
const char *format;
GstMapInfo gstMap;

s_cameraH264HardwareDecoder->m_IsGetNewFrameTaskLive = true;

while (!s_cameraH264HardwareDecoder->m_exitGetNewFrameTask) {
	gstImageSample = gst_app_sink_pull_sample(GST_APP_SINK(s_cameraH264HardwareDecoder->m_gstAppSink));
	if (gstImageSample != nullptr) {
		gstImageBuffer = gst_sample_get_buffer(gstImageSample);
		caps = gst_sample_get_caps(gstImageSample);
		gstStructure = gst_caps_get_structure(caps, 0);

		if (gst_buffer_map (gstImageBuffer, &gstMap, GST_MAP_READ)){
			image.width = g_value_get_int(gst_structure_get_value(gstStructure, "width"));
			image.height = g_value_get_int(gst_structure_get_value(gstStructure, "height"));
			format = g_value_get_string(gst_structure_get_value(gstStructure, "format"));
			strcpy(image.format, format);
			image.imageData = gstMap.data;
			image.imageDataLen = gstMap.size;
			printf("format1:%s\r\n",image.format);
			printf("height1:%d\r\n",image.height);
			printf("width1:%d\r\n",image.width);
			printf("gstMap.size:%ld\r\n",gstMap.size);
			 if (s_cameraH264HardwareDecoder->m_imageCallback != nullptr) {
			 	s_cameraH264HardwareDecoder->m_imageCallback(&image);
			 }
			gst_buffer_unmap(gstImageBuffer, &gstMap);
		} else {
			DERROR("Gst buffer can't map");
		}
        gst_sample_unref(gstImageSample);
	} else {
		if (gst_app_sink_is_eos(GST_APP_SINK(s_cameraH264HardwareDecoder->m_gstAppSink))) {
            DSTATUS("Get EOS for appsrc");
		}
	}
	usleep(1000);
}

s_cameraH264HardwareDecoder->m_IsGetNewFrameTaskLive = false;

return nullptr;

}
This code gstMap.size always get wrong value，But using omxh264dec can get the correct value and decoding is no problem，Please help to see where the problem might be，thanks

5

Hi,
It looks to be something wrong in souphttpsrc

On Jetpack 4.6.2, we see the error:

ERROR: from element /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstSoupHT
TPSrc:source: Secure connection setup failed.
Additional debug info:
gstsouphttpsrc.c(1379): gst_soup_http_src_parse_status (): /GstPlayBin:playbin0/
GstURIDecodeBin:uridecodebin0/GstSoupHTTPSrc:source:
Unacceptable TLS certificate (6), URL: https://www.freedesktop.org/software/gstr
eamer-sdk/data/media/sintel_trailer-480p.webm, Redirect to: (NULL)

On 5.0.2, the command can be run without hitting the error.

6

hi, The above code is another problem I encountered. In the code, we directly insert the H264 stream, but we can’t get the correct gstmap.size with nvv4l2decoder. I don’t know where the problem is.

7

There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks

Sorry for the late response, have you managed to get issue resolved or still need the support? Thanks