gstreamer allocation error on imx6dl-sabresd

gstreamer allocation error on imx6dl-sabresd

[Mauro Ziliani]

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Hi all.

I'm working on a imx6dl-sabresd derived board, gstreamer, uvcvideo 
webcam, Yocto Freescale i.MX Release Distro 4.1.15-2.0.1 FXMZ /dev/ttymxc0

the pipeline is

gst-launch-1.0 \
         imxv4l2src device=/dev/video1 \
         ! capsfilter caps="video/x-raw, width=640, height=480" \
         ! imxvideoconvert_g2d rotation=4 \
         ! imxv4l2sink overlay-width=800 overlay-height=600 
overlay-left=235 overlay-top=65 enable-last-sample=true name=sink


Sometime the webcam freeze. After the first freeze the video stream is 
black and gstream GST_DEBUG=1 show the following message

WARN    default gstallocatorphymem.c:259:gst_buffer_is_phymem: physical 
address in memory block is invalid


There is some explanation/patch for this behavior?


gstreamer 1.8.1

gstreamer-plugin-imx 0.12.2


Thanks for your help

MZ


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Re: [meta-freescale] gstreamer allocation error on imx6dl-sabresd

[Clay Montgomery]

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Hi Mauro,

   I would first determine if this problem could be caused by a problem 
with gstreamer.

One way to do that would be to run the camera with the 
mxc_v4l2_capture.out app that is provided by NXP in their unit tests.

It has some basic support for uvcvideo and runs without gstreamer.

Then you will know if it could really be a kernel problem.

Another approach, would be to try gstreamer on a newer kernel.

Regards, Clay


On 2/6/2020 3:50 AM, Mauro Ziliani wrote:
>
> Hi all.
>
> I'm working on a imx6dl-sabresd derived board, gstreamer, uvcvideo 
> webcam, Yocto Freescale i.MX Release Distro 4.1.15-2.0.1 FXMZ /dev/ttymxc0
>
> the pipeline is
>
> gst-launch-1.0 \
>         imxv4l2src device=/dev/video1 \
>         ! capsfilter caps="video/x-raw, width=640, height=480" \
>         ! imxvideoconvert_g2d rotation=4 \
>         ! imxv4l2sink overlay-width=800 overlay-height=600 
> overlay-left=235 overlay-top=65 enable-last-sample=true name=sink
>
>
> Sometime the webcam freeze. After the first freeze the video stream is 
> black and gstream GST_DEBUG=1 show the following message
>
> WARN    default gstallocatorphymem.c:259:gst_buffer_is_phymem: 
> physical address in memory block is invalid
>
>
> There is some explanation/patch for this behavior?
>
>
> gstreamer 1.8.1
>
> gstreamer-plugin-imx 0.12.2
>
>
> Thanks for your help
>
> MZ
>
>
> 

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