can not play videos with QT multimedia widgets, Buffers are dropped and the video lags Platform EGLFS

[sriramanravi]

Hi All ,
I have built yocto image with

DISTRO_FEATURE_remove = " x11 wayland"

gstreamer1.0 support for QT5.5 for imx6q board from freescale.

Kernel version built is 3.10.17

Platform EGLFS

I tried to run the example applications from QT5.5 such as QMLvideo from multimedia and it plays video smoothly without any delays.

but when i try to play video with videowidget from multimediawidgets example then i get a Warning: "A lot of buffers are being dropped."

This occurs only when i try to play mp4 video 1280x720, 1080x720 any video with higher pixel size.

and when i play video with lesser video image size it plays ok for example video with 360x240.

Note: videosink used above is qgstvideorenderersink.

Also, i would like to point out that the same video with 1280x720 plays well when i play it with gstreamer 1.0 with the following command

gst-launch-1.0 playbin uri=file:///home/root/mini.mp4

Any help or pointers related to this issue will be helpful!

Thanks & Regards
Sriraman Ravi

P.S the video sample is also attached.

[madhureddy]

Hello All,

I am trying to play a video through qt using gstreamer-1.0, it's not playing. showing message

No m_videoSink available.

Its showing same message when i tried with example applications from QT5.5, qmlvideo from multimedia.

Please find the log.

We have stucked here,please help on this it's very urgent.

root@nitrogen6x:~# ./HMI_IVI_APP_2.2/HMI_IVI_APP/HMI_IVI_APP --platform eglfs &

[1] 318

root@nitrogen6x:~# QEglFSImx6Hooks will set environment variable FB_MULTI_BUFFER=2 to enable double buffering and vsync.

If this is not desired, you can override this via: export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1

Unable to query physical screen size, defaulting to 100 dpi.

To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: known incorrect sRGB profile

qml: disabling the mouse area

qml: @ normal screen

qml: From JS file To 1

qml: Current index =  1

qml: @ normal screen

qml: enabling the mouse area

qml: @ normal screen

qml: enabling the mouse area

qml: @ normal screen

qml: enabling the mouse area

qml: @ normal screen

qml: enabling the mouse area

qml: @ normal screen

qml: enabling the mouse area

qml: @ normal screen

qml: enabling the mouse area

qml: @ File browser

qml: [file:///home/root/HMI_IVI_APP_2.2/HMI_IVI_APP/C++ Qt 40 - QMap.mp4]

qml: @ Before loading Global.filename  file:///home/root/HMI_IVI_APP_2.2/HMI_IVI_APP/C++ Qt 40 - QMap.mp4

No m_videoSink available!

libpng warning: iCCP: known incorrect sRGB profile

Could not resolve property : Polkadots-largewhite

qml: @ full screen

====== AIUR: 4.0.3 build on Jan 20 2016 23:33:57. ======

    Core: MPEG4PARSER_06.09.00  build on Apr 16 2014 02:20:23

file: /usr/lib/imx-mm/parser/lib_mp4_parser_arm11_elinux.so.3.2

[1]+  Done(1)                 ./HMI_IVI_APP_2.2/HMI_IVI_APP/HMI_IVI_APP --platform eglfs

[sriramanravi]

Try to build Yocto Image with fido branch. Thw QML multimedia example from QT works.

Regards

Sriraman Ravi

[Yuri]

Hello,

   I am afraid, there is no HW acceleration support in QT multimedia widgets,

only software rendering.

Have a great day,
Yuri

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[sriramanravi]

Hi Yuri,

Thanks for your reply!

Do you have any suggestions how i can resolve this issue ?

I would like to play video in QT in imx6q board using eglfs platform.

Best Regards

Sriraman Ravi

[Yuri]

Hello,

  Looks like only software optimizations may help, perhaps recent FSL BSP (L3.14.38) will be useful,
or QT provider can take some advices.

Regards,

Yuri.