Qt5+gstreamer camera preview issue

[jayzs]

export QT_QPA_PLATFORM=eglfs
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib/gstreamer-1.0
export QT_GSTREAMER_WINDOW_VIDEOSINK=kmssink

I can play .mp4 file correctly.
But when playing camera, it shows blank screen. There is no error message.

Can someone help?! Thank you very much.

[jsulm]

@jayzs said in Qt5+gstreamer camera preview issue:

There is no error message

Not even in the console?

[jayzs]

[root@rk3288:/]# qml_test
eglfs >> createSurface GBM_FORMAT_ARGB8888
eglfs >> sucess to create KMS FB!

this is the ourput in console

It is on the linux 4.4 built by buildroot. Run on rk3288(arm32v7, mali t764)

[jsulm]

@jayzs Does same app work on a PC?

[jayzs]

@jsulm Yes, it works on pc ubuntu 16.04. The qt version on board is 5.9, but 5.12 on pc.

Here is another message sometimes it shows:
[ 13.884117] rockchip-vop ff930000.vop: [drm:vop_crtc_enable] Update mode to 1920x1080p60, type: 11
[ 13.919835] [drm:hdmi_config_hdr_infoframe] ERROR Not support DRM Infoframe

the board is connecting an aoc 1080p monitor by hdmi.

I have checked the error msg, it just means no infoframe for hdmi version less then 2.11a, I dont know if this matters, because I can play video to the same monitor correctly.

Sorry I`m new so have to wait 600 seconds to send another text here.