/dev/video0: Invalid argument

[MatFrancois]

Hi, thanks for your project. I'm trying to plug my computer with HDMI on the raspberry PI to get his screen in local. I often have an issue when i run ffmpeg : [video4linux2, v4l2 @ 0x9fd250] ioctl(VIDIOC_STREAMON): Invalid argument /dev/video0: Invalid argument My HDMI capture card is in /dev/video0 though, and sometime it works well... if you have an idea about that it would be great thanks