[Bug 791471] v4l2object: non-default colorimetry broken for v4l2h264enc

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=791471

--- Comment #2 from Philipp Zabel <p.zabel at pengutronix.de> ---
Created attachment 365490
  --> https://bugzilla.gnome.org/attachment.cgi?id=365490&action=edit
V4L2 log for videotestsrc ! v4l2h264enc ! fakesink pipeline

The attached log contains the output of:

gst-launch-1.0 --gst-debug=*v4l2*:6 --gst-debug-no-color videotestsrc !
v4l2h264enc ! fakesink

Probed sink caps return:

colorimetry=(string){ bt601, smpte240m, bt709, 2:4:5:2, 2:4:5:3, 1:4:7:1,
2:4:7:1, 2:4:12:8, bt2020, 2:0:0:0 }

bt601 is negotiated with the videotestsrc, which does not necessarily match the
currently set colorimetry returned by G_FMT, and
gst_v4l2_object_set_format_full fails with:

ERROR: from element /GstPipeline:pipeline0/v4l2h264enc:v4l2h264enc0: Device
'/dev/video0' does not support bt601 colorimetry

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