Gstream giving issues

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

Hi I am trying to stream 4k video through gstreamer using

gst-launch-1.0 filesrc location=/home/abhian/Downloads/4k.mp4 ! qtdemux name=demux demux.video_0 ! queue ! h264parse ! omxh264dec ! nvoverlaysink

However The video is not being displayed.I am assuming that the video is running but displayed judginh from the logs

I am getting following error/logs in terminal

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...

(gst-launch-1.0:28695): GStreamer-CRITICAL **: 08:58:27.521: gst_caps_is_empty: assertion 'GST_IS_CAPS (caps)' failed

(gst-launch-1.0:28695): GStreamer-CRITICAL **: 08:58:27.521: gst_caps_truncate: assertion 'GST_IS_CAPS (caps)' failed

(gst-launch-1.0:28695): GStreamer-CRITICAL **: 08:58:27.521: gst_caps_fixate: assertion 'GST_IS_CAPS (caps)' failed

(gst-launch-1.0:28695): GStreamer-CRITICAL **: 08:58:27.522: gst_caps_get_structure: assertion 'GST_IS_CAPS (caps)' failed

(gst-launch-1.0:28695): GStreamer-CRITICAL **: 08:58:27.522: gst_structure_get_string: assertion 'structure != NULL' failed

(gst-launch-1.0:28695): GStreamer-CRITICAL **: 08:58:27.522: gst_mini_object_unref: assertion 'mini_object != NULL' failed
NvMMLiteOpen : Block : BlockType = 261 
NVMEDIA: Reading vendor.tegra.display-size : status: 6 
NvMMLiteBlockCreate : Block : BlockType = 261 
Allocating new output: 3840x2160 (x 12), ThumbnailMode = 0
OPENMAX: HandleNewStreamFormat: 3605: Send OMX_EventPortSettingsChanged: nFrameWidth = 3840, nFrameHeight = 2160 
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
Got EOS from element "pipeline0".
Execution ended after 0:00:24.315970575
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
3

Hi,
Probably your TV does not support 4K mode(3840x2160). You may downscale it to 1920x1080 and try again.

gst-launch-1.0 filesrc location=/home/abhian/Downloads/4k.mp4 ! qtdemux name=demux demux.video_0 ! queue ! h264parse ! nvv4l2decoder ! nvvidconv ! 'video/x-raw(memory:NVMM),width=1920,height=1080' ! nvoverlaysink
4

Hey. My monitor is 4k@30fps

5

Hi,
Please try this video file:
https://jell.yfish.us/media/jellyfish-120-mbps-4k-uhd-h264.mkv

$ gst-launch-1.0 filesrc location= jellyfish-120-mbps-4k-uhd-h264.mkv ! matroskademux ! h264parse ! nvv4l2decoder ! nvvidconv ! 'video/x-raw(memory:NVMM),width=1920,height=1080' ! nvoverlaysink
$ gst-launch-1.0 filesrc location= jellyfish-120-mbps-4k-uhd-h264.mkv ! matroskademux ! h264parse ! nvv4l2decoder ! nvvidconv ! 'video/x-raw(memory:NVMM),width=3840,height=2160' ! nvoverlaysink

We don’t see any issue in decoding the file.

6

got errror

ysink
Setting pipeline to PAUSED ...
Opening in BLOCKING MODE 
Pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/GstMatroskaDemux:matroskademux0: Could not demultiplex stream.
Additional debug info:
matroska-demux.c(5227): gst_matroska_demux_loop (): /GstPipeline:pipeline0/GstMatroskaDemux:matroskademux0:
got eos but no streams (yet)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...
8

Hi,
We don’t observe the error. You may clean gstreamer cache and try again. If it is still present, suggest you re-flash the system.