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Hi all,
I'm tryng to modify "vivi" module (Virtual Video Driver) of V4L2 to handle framerate.
I did the following steps:
1) load module vivi:
#insmod vivi.ko
it creates a standard video camera /dev/videoN
2)launching gstreamer pipelines to get a video stream from video camera:
# gst-launch-0.10 v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480,format=(fourcc)YUY2,framerate=(fraction)15/1' ! fakesink
I got this error:
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not negotiate format
launching the same pipeline without framerate options it works fine.
What happened is normal because vivi module doen't handle ioctl function to set/get framerate and use a steady framerate of 30Hz. So, what ioctls of V4L2 I need to implement in vivi module??
I've tryed to handle VIDIOC_S_PARM,VIDIOC_G_PARM and VIDIOC_ENUMSTD ioctls but nothing change.
Thank you
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