We made video test with a specific board with iMX6 Quad Plus and Ethernet Gigabit link. It works under 3.14.52 kernel from yocto Jethro Linux distrib.
We tested our board with a PC that generate video flow thanks to a Windows gstreamer version (from https://gstreamer.freedesktop.org/data/pkg/windows/1.10.2 ).
The configuration is as follow:
In PC side, we use gstreamer Windows version to generate video flow (from https://gstreamer.freedesktop.org/data/pkg/windows/1.10.2 )
We start this command from C:\gstreamer\1.0\x86_64\bin directory:
gst-launch-1.0.exe videotestsrc ! videoconvert ! videoscale ! timeoverlay ! video/x-raw,sampling=YCbCr-4:2:0,width=720, height=576,framerate=60/1 ! queue ! rtpvrawpay -v ! udpsink host=192.10.2.83 port=1234
Setting pipeline to PAUSED ... |
In iMX6 side, we use these shell commands :
ifconfig enp1s0 192.10.2.83 netmask 255.255.252.0
then
gst-launch-1.0 udpsrc uri=udp://192.10.2.83:1234 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW,sampling=YCbCr-4:2:0, depth=(string)8, width=(string)720, height=(string)576, payload=(int)96" ! queue ! rtpvrawdepay ! autovideosink -v
Setting pipeline to PAUSED ... display(/dev/fb0) resolution is (1024x768). ====== OVERLAYSINK: 4.0.8 build on Jul 13 2016 15:19:55. ====== display(/dev/fb0) resolution is (1024x768). display(/dev/fb0) resolution is (1024x768). Pipeline is live and does not need PREROLL ... /GstPipeline:pipeline0/GstUDPSrc:udpsrc0.GstPad:src: caps = "application/x-rtp\,\ media\=\(string\)video\,\ clock-rate\=\(int\)90000\,\ encoding-name\=\(string\)RAW\,\ sampling\=\(string\)YCbCr-4:2:0\,\ depth\=\(string\)8\,\ width\=\(string\)720\,\ height\=\(string\)576\,\ payload\=\(int\)96" /GstPipeline:pipeline0/GstQueue:queue0.GstPad:src: caps = "application/x-rtp\,\ media\=\(string\)video\,\ clock-rate\=\(int\)90000\,\ encoding-name\=\(string\)RAW\,\ sampling\=\(string\)YCbCr-4:2:0\,\ depth\=\(string\)8\,\ width\=\(string\)720\,\ height\=\(string\)576\,\ payload\=\(int\)96" /GstPipeline:pipeline0/GstRtpVRawDepay:rtpvrawdepay0.GstPad:src: caps = "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ interlace-mode\=\(string\)progressive\,\ colorimetry\=\(string\)bt601\,\ framerate\=\(fraction\)0/1" Setting pipeline to PLAYING ... /GstPipeline:pipeline0/GstRtpVRawDepay:rtpvrawdepay0.GstPad:src: caps = "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ interlace-mode\=\(string\)progressive\,\ colorimetry\=\(string\)bt601\,\ framerate\=\(fraction\)0/1" New clock: GstSystemClock /GstPipeline:pipeline0/GstImxIpuVideoTransform:imxipuvideotransform0.GstPad:src: caps = "video/x-raw\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ interlace-mode\=\(string\)progressive\,\ framerate\=\(fraction\)0/1\,\ format\=\(string\)I420" /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink.GstProxyPad:proxypad0: caps = "video/x-raw\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ interlace-mode\=\(string\)progressive\,\ framerate\=\(fraction\)0/1\,\ format\=\(string\)I420" /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstOverlaySink:autovideosink0-actual-sink-overlay.GstPad:sink: caps = "video/x-raw\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ interlace-mode\=\(string\)progressive\,\ framerate\=\(fraction\)0/1\,\ format\=\(string\)I420" /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink: caps = "video/x-raw\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ interlace-mode\=\(string\)progressive\,\ framerate\=\(fraction\)0/1\,\ format\=\(string\)I420" /GstPipeline:pipeline0/GstImxIpuVideoTransform:imxipuvideotransform0.GstPad:sink: caps = "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ interlace-mode\=\(string\)progressive\,\ colorimetry\=\(string\)bt601\,\ framerate\=\(fraction\)0/1" /GstPipeline:pipeline0/GstRtpVRawDepay:rtpvrawdepay0.GstPad:sink: caps = "application/x-rtp\,\ media\=\(string\)video\,\ clock-rate\=\(int\)90000\,\ encoding-name\=\(string\)RAW\,\ sampling\=\(string\)YCbCr-4:2:0\,\ depth\=\(string\)8\,\ width\=\(string\)720\,\ height\=\(string\)576\,\ payload\=\(int\)96" |
- As a result we obtain a wrong iMX6 video display with many abnormal black lines despite CPU usage never exceed 100% and Ethernet bandwith is under 39Mb/sec.
- Is something is wrong in my iMX6 RAW decoding or is there are gstreamer limit with RAW format?
Regards,
Gabriel GRANGE
