[Bug 724521] v4l2object: Inconvenient handling of V4L2_FRMSIZE_STEPWISE

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=724521
  GStreamer | gst-plugins-good | git

Robert Swain <robert.swain> changed:

           What    |Removed                     |Added
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                 CC|                            |robert.swain at gmail.com

--- Comment #12 from Robert Swain <robert.swain at gmail.com> 2014-06-30 12:28:02 UTC ---
(In reply to comment #11)
> Created an attachment (id=279583)
 View: https://bugzilla.gnome.org/attachment.cgi?id=279583
 Review: https://bugzilla.gnome.org/review?bug=724521&attachment=279583

> v4l2: fix probing and enumeration of stepwise frame sizes (untested)
> 
> Possible patch, completely untested so far.

This patch at least allows some video to be output on the Raspberry Pi with the
following command line:

gst-launch-1.0 v4l2src ! video/x-raw,width=1280,height=720 ! glimagesink

However, it does not look like it changed the resolution of the video being
captured as I could see a lot of aliasing on diagonal edges that I had not seen
previously.

Also, using video/x-h264,width...,height... ! h264parse ! mp4mux ! filesink
does not output any data. v4l2src occasionally spits messages about incorrect
pixel format.

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