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\n\tThu, 02 Jul 2026 07:53:19 -0700 (PDT)","From":"David Plowman ","To":"libcamera-devel@lists.libcamera.org","Cc":"David Plowman ","Subject":"[PATCH 0/1] Make Gstreamer prefer non-raw caps","Date":"Thu, 2 Jul 2026 15:39:16 +0100","Message-ID":"<20260702145317.86482-1-david.plowman@raspberrypi.com>","X-Mailer":"git-send-email 2.47.3","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Hi everyone\n\nAnother episode in my side-quest to make gstreamer/libcamera work\nbetter on the Pi. I thought a cover-note was desirable because I'm not\n100% sure about these bits of gstreamer, so some background may help.\n\nBasically I was trying to run \"cheese\". It uses libcamera through\ngstreamer so I thought it should stand a fighting chance.\nUnfortuntely, though, I found that its preference for fixed size\noutputs (over ranges) gave it a nasty habit of going for raw (Bayer)\nimage formats which general-purpose camera apps like \"cheese\" can't\nhandle.\n\nAnyway, I've rearranged it a bit to perform the same logic as before\n(preferring fixed size over ranges), but _separately_ for raw and\nnon-raw streams. Finally, it will prefer non-raw over raw, if it\ncan. So folks who explicitly want raw will still get it, but\notherwise, those general-purpose apps should mostly get non-raw.\n\nI think this makes sense, and may work for everyone, but it's hard to\nbe sure so it would be good to have some other opinions!\n\nThanks in advance\n\nDavid\n\nDavid Plowman (1):\n gstreamer: Prefer non-raw (i.e. non-Bayer) formats in caps negotiation\n\n src/gstreamer/gstlibcamera-utils.cpp | 96 +++++++++++++++++++++-------\n src/gstreamer/gstlibcamera-utils.h | 2 +-\n src/gstreamer/gstlibcamerasrc.cpp | 3 +-\n 3 files changed, 75 insertions(+), 26 deletions(-)"}