<div dir="auto"><div> <div class="gmail_quote"><div dir="ltr">Le mar. 24 avr. 2018 09:27, Iñigo Huguet <<a href="mailto:inigohuguet@fanamoel.com">inigohuguet@fanamoel.com</a>> a écrit : </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I don't have playbin2, but I do have playbin. It doesn't work right now, I think it is because the driver doesn't report correctly its available framesizes (width X height). That's why I had to specify them with video/x-raw width=720,height=576 There is any way to specify the framesize with playbin? If not, I will try to fix the driver. </blockquote></div></div><div dir="auto"> </div><div dir="auto">If that is an option for you, then it's best thing to do. By the way, are you aware of the v4l2-compliance test ? This test, which is part of v4l2-utils helps a lot to ensure your driver is usable across most userapace.</div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> El 24/04/18 a las 12:45, Bernhard Graaf escribió: > Have you try to use playbin2 instead? > Something like 'gst-launch-1.0 playbin2 uri=v4l2:///dev/video1'. > If its works, have a look into the log and see what playbin2 had done. > > Bernhard > > -----Ursprüngliche Nachricht----- > Von: gstreamer-devel [mailto:<a href="mailto:gstreamer-devel-bounces@lists.freedesktop.org" target="_blank" rel="noreferrer">gstreamer-devel-bounces@lists.freedesktop.org</a>] > Im Auftrag von Iñigo Huguet > Gesendet: Dienstag, 24. April 2018 11:13 > An: Antonio Ospite; <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank" rel="noreferrer">gstreamer-devel@lists.freedesktop.org</a> > Betreff: Re: Displaying camera not working > > Hi. > > I have gotten one frame as you told me > > gst-launch-1.0 v4l2src num-buffers=1 device=/dev/video1 ! > video/x-raw,format=NV12,width=720,height=576 ! filesink > location=raw_frame.bin > > Then, in my computer, I converted it to png: > > gst-launch-1.0 -v filesrc location=raw_frame.bin ! videoparse width=720 > height=576 format=GST_VIDEO_FORMAT_NV12 ! videoconvert ! pngenc ! > filesink location=raw_frame.png > > I can see the .png image correctly, so it seems that the driver outputs > NV12. What can I try now? Maybe I need any additional plugin? (I'm using > a custom build using Buildroot so I don't have all plugins installed) > > El 23/04/18 a las 17:09, Antonio Ospite escribió: >> On Mon, 23 Apr 2018 16:26:42 +0200 >> Iñigo Huguet <<a href="mailto:inigohuguet@fanamoel.com" target="_blank" rel="noreferrer">inigohuguet@fanamoel.com</a>> wrote: >> >>> I have managed to solve a problem: it seems that the sprite was not well >>> reported by the driver (it said it was 1080 instead of 720). Now I think >>> it gives the correct values for a 720x576px NV12 frame: sprite 720, size >>> 622080 >>> >>> However, I still doesn't have a good output, and I don't know what to do >>> to find what's wrong (I have no previous experience with video nor >>> gstreamer). >>> >>> With this pipeline: gst-launch-1.0 v4l2src device=/dev/video1 ! >>> video/x-raw,format=NV12,width=720, >>> height=576 ! videoconvert ! xvimagesink sync=false >>> >>> I only get an output with very colorful lines (almost horizontal lines). >>> >>> I attach the output of the driver and gstreamer with >>> GST_DEBUG=*videosink*:6,*imagesink*:6,*v4l2*:6 >>> >>> Any hint? Thanks! >>> >> If you cannot trust the driver to report the correct data format (I am >> thinking to the pixelformat in particular), then GStreamer videoconvert >> won't be able to use the caps in any meaningful way. >> >> You could analyze a raw frame to confirm that it's actually NV12. >> >> A sample pipeline which (hopefully) dumps one frame is: >> >> gst-launch-1.0 v4l2src num-buffers=1 device=/dev/video1 ! filesink > location=raw_frame.bin >> Upload the raw data somewhere and maybe someone will take a look >> if they have time. >> >> Ciao, >> Antonio >> > _______________________________________________ > gstreamer-devel mailing list > <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank" rel="noreferrer">gstreamer-devel@lists.freedesktop.org</a> > <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > > _______________________________________________ > gstreamer-devel mailing list > <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank" rel="noreferrer">gstreamer-devel@lists.freedesktop.org</a> > <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank" rel="noreferrer">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div></div></div>