Video Encoding Issue on iMX8M Mini

[miltechniks]

Hi,

currently I have an Issue with Video-Playback where with some VP8 encoded videos there is an Issue with the picture. That's how it should look like: That's how it look like:

So the Issue is this bar on the top of the Image. This bar is there, depending on the source video.

I already had a look to this issue https://github.com/Igalia/meta-webkit/issues/183 but it seems to be another problem, as it hasn't solved the issue. When I play the same Video with gst-play-1.0 from the Web-Source there is no Issue. So, to play it bad: cog --platform=fdo https://dl8.webmfiles.org/big-buck-bunny_trailer.webm To play it good: gst-play-1.0 https://dl8.webmfiles.org/big-buck-bunny_trailer.webm

I'm using the Vivante OpenGL Driver due to the fact, that the Etnaviv OpenGL isn't possible to compile for the iMX8M Mini, or at least I haven't found a solution for that.

What am I missing to get this Issue solved? Thanks for your help.

[philn]

Please provide logs: https://github.com/Igalia/meta-webkit/wiki/Providing-useful-GStreamer-Zero-copy-issue-reports Which video-sink is used by gst-play-1.0 ?

[philn]

I suspect this might the same as https://github.com/Igalia/cog/issues/364

[miltechniks]

Thanks for your answer. I used the waylandsink (gst-play-1.0 --videosink=waylandsink https://dl8.webmfiles.org/big-buck-bunny_trailer.webm). With the glimagesink it's similar, except that it's not fullscreen and somewhere on the window.

Informations and logs

Version: GStreamer 1.18.0 Plugins: gstreamer1.0-plugins-imx, gstreamer1.0-plugins-good, gstreamer1.0-plugins-bad, gstreamer1.0-plugins-base and a few others included by wpewebkit.inc Yocto Release: Hardknott Layers: BBLAYERS = " \ ${BSPDIR}/sources/poky/meta \ ${BSPDIR}/sources/poky/meta-poky \ \ ${BSPDIR}/sources/meta-openembedded/meta-oe \ ${BSPDIR}/sources/meta-openembedded/meta-multimedia \ ${BSPDIR}/sources/meta-openembedded/meta-python \ \ ${BSPDIR}/sources/meta-freescale \ ${BSPDIR}/sources/meta-freescale-3rdparty \ ${BSPDIR}/sources/meta-freescale-distro \ "

# i.MX Yocto Project Release layers BBLAYERS += "${BSPDIR}/sources/meta-imx/meta-bsp" BBLAYERS += "${BSPDIR}/sources/meta-imx/meta-sdk" BBLAYERS += "${BSPDIR}/sources/meta-imx/meta-ml" BBLAYERS += "${BSPDIR}/sources/meta-imx/meta-v2x" BBLAYERS += "${BSPDIR}/sources/meta-nxp-demo-experience"

BBLAYERS += "${BSPDIR}/sources/meta-browser/meta-chromium" BBLAYERS += "${BSPDIR}/sources/meta-clang" BBLAYERS += "${BSPDIR}/sources/meta-openembedded/meta-gnome" BBLAYERS += "${BSPDIR}/sources/meta-openembedded/meta-networking" BBLAYERS += "${BSPDIR}/sources/meta-openembedded/meta-filesystems" BBLAYERS += "${BSPDIR}/sources/meta-qt5" BBLAYERS += "${BSPDIR}/sources/meta-python2" BBLAYERS += "${BSPDIR}/sources/meta-webkit"

BBLAYERS ?= " \ ${BSPDIR}/sources/meta-openembedded/oe-core/meta \ ${BSPDIR}/sources/meta-openembedded/meta-openembedded/meta-oe \ ${BSPDIR}/sources/meta-openembedded/meta-openembedded/meta-perl \ ${BSPDIR}/sources/meta-openembedded/meta-openembedded/meta-python \ ${BSPDIR}/sources/meta-openembedded/meta-openembedded/meta-networking \ ${BSPDIR}/sources/meta-security"

Here are the logs: Trailer_Log.zip

Regarding the other issue I'm not sure if it is the same. In my case the video is playing and loading. .

[philn]

Is rendering OK with this too? gst-play-1.0 --videosink "imxvideoconvert_g2d ! glimagesink" ?

[miltechniks]

The Issue seems to be in the imxvideoconvert_g2d, as with this command the rendering is wrong as well. When I remove it and only use gst-play-1.0 --videosink "glimagesink" everything is fine.

[philn]

Can you report this to Freescale/NXP then? Or whoever maintains this element ;)

[miltechniks]

Yeah, I'm going to report this. Thanks for your help.

I removed the imxvideoconvert_g2d within the webkit for testing purposes and then everything runs as expected. If anyone is interested, that's the patch for it: 0003-Remove-imxvideoconvert_g2d-plugin-in-gstreamer-pipeline.txt