Jetson TX1 H.265 video quality

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

Hi everyone,
Now I am testing H.265 video quality with 1080p@60fps on Jetson TX1
gst-launch-1.0 v4l2src device=/dev/video0 ! ‘video/x-raw, width=1920, height=1080, framerate=60/1, format=UYVY’ ! nvvidconv ! ‘video/x-raw(memory:NVMM), width=1920, height=1080, format=I420, framerate=60/1’ ! omxh265enc control-rate=2 bitrate=4000000 iframeinterval=30 quality-level=2 ! ‘video/x-h265, stream-format=(string)byte-stream’ ! h265parse ! mpegtsmux ! udpsink host=$CLIENT_IP port=5000 sync=false async=false -e

Howerver the quality is not really good, I can see the blocking artifact frequently, especially on back ground (video is played on VLC).
Are there any can tell me what parameters I can change in order to improve the video quality?
Thank in advance,
Best regards.

2

Please try omxh265enc bitrate=8000000 iframeinterval=30 preset-level=2

3

Dear DaneLLL,
I have checked with higher bitrate for h.265 encoder (8Mbps, 12Mbps, 16Mpbs), the quality is improve a little bit, but there is still has noise.
I attached a saved video that run with 8 Mbps (see from 15th second), you can see the video quality is bad, especially on back ground.
https://drive.google.com/open?id=0B08AGuxrMB_JZU5Qd09EdUFTNUE
Could you give me more suggestion.
Looking for your reply.
Thank.

4

Have you tried preset-level? And please compare with local file to eliminate effect of network

gst-launch-1.0 v4l2src device=/dev/video0 ! 'video/x-raw, width=1920, height=1080, framerate=60/1, format=UYVY' ! nvvidconv ! 'video/x-raw(memory:NVMM), width=1920, height=1080, format=I420, framerate=60/1' ! omxh265enc bitrate=8000000 iframeinterval=30 preset-level=2 ! 'video/x-h265, stream-format=(string)byte-stream' ! h265parse ! mpegtsmux ! filesink location=a.ts