media-video/v4l2-relayd: add new ebuild

media-video/v4l2-relayd/Manifest

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+DIST v4l2-relayd-0.1.5.tar.xz 17500 BLAKE2B 15fcd1adfa7d6e550df5df03ea292b58a9376fdf6205e84f074830de1287611f69a69a762462ad5110096b5262edc2068baef0c1e47db39bb70173ff4e796872 SHA512 b7c432b295177d73a640e21056a6d706af51cd525ea07b19f26d1bc79536d43167f8821522f3e8449356ace7b9fab913aeb5081d9d11065cfe6d0c6cb4637b2b

media-video/v4l2-relayd/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>david.guglielmi@gmail.com</email>
+		<name>David GUGLIELMI</name>
+	</maintainer>
+	<use>
+		<flag name="icamera">Intel MIPI Camera support</flag>
+	</use>
+	<upstream>
+		<remote-id type="launchpad">v4l2-relayd</remote-id>
+	</upstream>
+</pkgmetadata>

media-video/v4l2-relayd/v4l2-relayd-0.1.5.ebuild

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+# Copyright 2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit autotools systemd
+
+DESCRIPTION="Streaming relay for v4l2loopback using GStreamer"
+HOMEPAGE="https://git.launchpad.net/v4l2-relayd"
+SRC_URI="
+	https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/${PN}/${PV}-0ubuntu1/${PN}_${PV}.orig.tar.xz
+		-> ${P}.tar.xz
+"
+
+LICENSE=""
+SLOT="0"
+KEYWORDS="~amd64"
+
+IUSE="+icamera"
+
+DEPEND="
+	dev-libs/glib:=
+	media-libs/gstreamer:1.0
+	media-libs/gst-plugins-base:1.0
+"
+RDEPEND="
+	${DEPEND}
+	icamera? (
+		media-plugins/gst-plugins-icamera
+	)
+	media-video/v4l2loopback
+"
+
+src_prepare() {
+	eautoreconf
+
+	if use icamera; then
+		sed -i \
+			-e '/^FORMAT=/s#.*#FORMAT=NV12#g' \
+			-e '/^VIDEOSRC=/s#.*#VIDEOSRC="icamerasrc"#g' \
+			-e '/^CARD_LABEL=/s#.*#CARD_LABEL="Intel MIPI Camera"#g' \
+			data/etc/default/${PN} || die
+
+		sed -i \
+			-e 's#card_label="Virtual Camera"#card_label="Intel MIPI Camera"#g' \
+			data/etc/modprobe.d/${PN}.conf || die
+	fi
+
+	default
+}
+
+src_configure() {
+	econf \
+	--with-systemdsystemunitdir="$(systemd_get_systemunitdir)"
+}