{"id":27387,"url":"https://patchwork.libcamera.org/api/covers/27387/?format=json","web_url":"https://patchwork.libcamera.org/cover/27387/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260720115144.4392-1-david.plowman@raspberrypi.com>","date":"2026-07-20T11:10:06","name":"[v2,0/1] Make Gstreamer prefer non-raw caps","submitter":{"id":42,"url":"https://patchwork.libcamera.org/api/people/42/?format=json","name":"David Plowman","email":"david.plowman@raspberrypi.com"},"mbox":"https://patchwork.libcamera.org/cover/27387/mbox/","series":[{"id":6065,"url":"https://patchwork.libcamera.org/api/series/6065/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=6065","date":"2026-07-20T11:10:06","name":"Make Gstreamer prefer non-raw caps","version":2,"mbox":"https://patchwork.libcamera.org/series/6065/mbox/"}],"comments":"https://patchwork.libcamera.org/api/covers/27387/comments/","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id A229AC328C\n\tfor ;\n\tMon, 20 Jul 2026 11:51:51 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 015B867E2D;\n\tMon, 20 Jul 2026 13:51:51 +0200 (CEST)","from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com\n\t[IPv6:2a00:1450:4864:20::42f])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 8772066122\n\tfor ;\n\tMon, 20 Jul 2026 13:51:48 +0200 (CEST)","by mail-wr1-x42f.google.com with SMTP id\n\tffacd0b85a97d-47f785467faso515599f8f.2\n\tfor ;\n\tMon, 20 Jul 2026 04:51:48 -0700 (PDT)","from davidp-pi5.pitowers.org\n\t([2a00:1098:3142:1f:4706:89ee:c47e:1087])\n\tby smtp.gmail.com with ESMTPSA id\n\tffacd0b85a97d-47f63ec7c69sm31270120f8f.17.2026.07.20.04.51.47\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tMon, 20 Jul 2026 04:51:47 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com; 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\n\tMon, 20 Jul 2026 04:51:48 -0700 (PDT)","From":"David Plowman ","To":"libcamera-devel@lists.libcamera.org","Cc":"David Plowman ","Subject":"[PATCH v2 0/1] Make Gstreamer prefer non-raw caps","Date":"Mon, 20 Jul 2026 12:10:06 +0100","Message-ID":"<20260720115144.4392-1-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\n\nHere's a version 2 which incorporates some suggestions from Nicolas\nwhich I agree makes things a bit clearer.\n\n1. Raw monochrome formats are identified by being video/x-raw with 1\ncomponent, matching the existing bare_structure_from_format function\nin this file.\n\n2. The comparison is rearranged to use a sorted list, as some other\ncomponents do. This keeps all the logic in one place and makes it\neasier to understand.\n\nActually, on point 1 above I do have some misgivings. Treating\nvideo/x-raw with 1 component as \"monochrome raw\" seems a bit\ncontroversial as we can't distinguish \"raw\" greyscale from \"processed\"\ngreyscale. I wonder a little bit if bare_structure_from_format should\ncategorise the greyscale formats as video/x-bayer but with a format\nset to something like \"mono\"? Is that possible?\n\nThat feels like it's a bit above my pay grade at this point, but in\nany case could be something for a subsequent commit.\n\nThanks\n\nDavid\n\n\nDavid Plowman (1):\n gstreamer: Prefer non-raw (i.e. non-Bayer) formats in caps negotiation\n\n src/gstreamer/gstlibcamera-utils.cpp | 125 ++++++++++++++++++++-------\n src/gstreamer/gstlibcamera-utils.h | 2 +-\n src/gstreamer/gstlibcamerasrc.cpp | 3 +-\n 3 files changed, 97 insertions(+), 33 deletions(-)"}