AW: Displaying camera not working

[Nicolas Dufresne]

Le vendredi 27 avril 2018 à 11:17 +0200, Iñigo Huguet a écrit :
> gst-launch-1.0 filesrc location=raw_video.bin ! videoparse width=720
> height=576 format=GST_VIDEO_FORMAT_NV12 ! videoconvert !
> autovideosink
> This way, I can see the image OK, not only lot of lines of random
> colors. So I concluded that the problem in my device must be in
> videoconvert or in xvimagesink, not in the cameras driver.
> My device is using an Allwinner A20 SoC. This SoC uses the
> framebuffer to output graphics, even using X11. So I installed
> fbdevsink plugin and tried this command:
> 
> gst-launch-1.0 v4l2src device=/dev/video1 ! video/x-
> raw,format=NV12,width=720,height=576 ! videoconvert ! fbdevsink
> sync=false
> 
> I can see the image OK. I still don't know if the problem is in
> videoconvert, in xvimagesink, or in both. However, I can't use
> fbdevsink because it interferes with X11, trying both of them to
> "take control" of the framebuffer. Any hint about what can I try to
> find out what's failing and how to solve it?

It's more likely a bug in XV driver. Make sure you use the very latest
upstream code there.

> 
> Also, I have another problem. Only one of every 7 buffers seems to be
> updated with a new frame, the other 6 remains with the first fame
> they captured at the beginning, so I have a video of the same
> sequence of 6 frames repeating all time the same and one single frame
> that seems to be correct between each 6 frames sequence.

Looks familiar, but something that would have been fixed a long time
ago. Which GStreamer version are you running ?

Nicolas