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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