Hi,
I'm using iMX6S (Ubuntu 16.04) with Logitech C270 Webcam and trying to record a video from webcam with GStreamer. But I always got error like:
ERROR: v4l2 capture: slave not found!
WARNING: erroneous pipeline: could not link imxv4l2src0 to vpuenc_h264-0
I'm using this:
gst-launch-1.0 imxv4l2src device=/dev/video1 num-buffers=300 typefind=true ! 'video/x-h264,format=(string)UYVY,width=1280,height=720,framerate=(fraction)15/1' ! vpuenc_h264 ! mp4mux ! filesink location=output.mp4
Did I missing something or wrong position something ? I refer to i.MX Linux® User's Guide.
UPDATE:
I also try with by adding videoconvert and change 'video/x-h264' to 'video/x-raw'
gst-launch-1.0 v4l2src device=/dev/video1 num-buffers=300 ! 'video/x-raw,format=(string)UYVY,width=1280,height=720,framerate=(fraction)15/1' ! videoconvert ! vpuenc_h264 ! mp4mux ! filesink location=output.mp4
And still get error:
ERROR: v4l2 capture: slave not found!
Setting pipeline to PAUSED ...
[INFO] Product Info: i.MX6Q/D/S
====== VPUENC: 4.0.9 build on Jun 22 2016 17:54:13. ======
wrapper: 1.0.65 (VPUWRAPPER_ARM_LINUX Build on Jun 22 2016 17:50:25)
vpulib: 5.4.33
firmware: 3.1.1.46072
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.
Additional debug info:
/home/pico/workspace/yocto/tn_yocto_4.1.15/build-x11/tmp/work/cortexa9hf-vfp-neon-poky-linux-gnueabi/gstreamer1.0/1.6.0-r0/gstreamer-1.6.0/libs/gst/base/gstbasesrc.c(2943): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming task paused, reason not-negotiated (-4)
Execution ended after 0:00:01.918506967
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
Thank you so much,
Toan
Solved! Go to Solution.
did you enable it in the kernel? maybe you can refer to the document as below:
Thank you for your response. It's so helpful. I going to try and tell you soon.
what camera do you use? if you use mipi, pls try to refer to the document as below:
https://community.nxp.com/thread/307065?commentID=503426#comment-503426
As I mention above, I use webcam Logitech C270. So It's can not use with MIPI (as I know). Do you have any idea ?
did you enable it in the kernel? maybe you can refer to the document as below: