GStreamer pipeline with omxh264enc and RTP

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

I am attempting to stream video and need to use H264 encoding. The following pipeline works:

gst-launch-1.0 nvarguscamerasrc maxperf=1 ! 'video/x-raw(memory:NVMM), width=(int)640, height=(int)480, framerate=(fraction)30/1' ! nvv4l2h264enc ! rtph264pay ! udpsink host=127.0.0.1 port=5000

However, as soon as I swap out the nvv4l2h264enc for omxh264enc, the pipeline no longer works:

gst-launch-1.0 nvarguscamerasrc maxperf=1 ! 'video/x-raw(memory:NVMM), width=(int)640, height=(int)480, framerate=(fraction)30/1' ! omxh264enc ! rtph264pay ! udpsink host=127.0.0.1 port=5000

I see the following error in debug mode:
WARN omxvideoenc gstomxvideoenc.c:1860:gst_omx_video_enc_set_format: Error setting temporal_tradeoff 0 : Vendor specific error (0x00000001)

I need to use omxh264enc, and I have seen similar posts, but I was unable to fix the issue. Can someone confirm that this issue by running the two pipelines above? I have tried on both a TX2 and Xavier running JetPack 4.2.

Thank you.

2

Hi,
Please add h264parse and try again.

A reference post:
https://devtalk.nvidia.com/default/topic/1027423/jetson-tx2/gstreamer-issue-on-tx2/post/5225972/#5225972

3

Thank you, yes, that worked. Is there a reason this needs to be added for the omxh264enc decoder but not nvv4l2h264enc?

4

Hi,
Not sure why it works without h264parse. We always have it after nvv4l2h264enc while linking to muxer(qtmux, matroskamux, …). Please check examples in user guide.
https://developer.nvidia.com/embedded/dlc/l4t-accelerated-gstreamer-guide-32-2

For writing h264 stream to a file without muxing, it is not required and nvv4l2h264enc can be linked with filesink directly.