Gstreamer Analog Video Capturing

Question

I am using Sensoray Model-1012 frame grabber. First of all my setup is getting a screen output from HDMI and convert it to NTSC CVBS output. I am getting screen video to Toradex IM8 CPU via model-1012.

My problem is, when there is something moving horizontally on the screen it gets sketched from corners. I am loading an example video. It doesn't occur when I connect analog video to my JVC display.

I am using Gstreamer as a software and here is my pipeline:

GST_DEBUG=3 gst-launch-1.0 v4l2src device=/dev/video6 ! 'video/x-raw, format=(string)UYVY, width=720, height=480, framerate=30/1' ! interlace field-pattern=2 ! videoconvert ! autovideosink

Answer 1

The problem should be related to the "interlace" module. You can find here a description of interlacing. Basically half of the lines of your image are from a previous frame, and when something moves in the scene it looks weird, like ghosted. You should be able to solve simply removing interlace

GST_DEBUG=3 gst-launch-1.0 v4l2src device=/dev/video6 ! 'video/x-raw, format=(string)UYVY, width=720, height=480, framerate=30/1' ! videoconvert ! autovideosink