diff --git a/multimedia/obs-studio/Makefile b/multimedia/obs-studio/Makefile
index 9336e33d7833..31c69cff2ad7 100644
--- a/multimedia/obs-studio/Makefile
+++ b/multimedia/obs-studio/Makefile
@@ -1,110 +1,110 @@
 PORTNAME=	obs-studio
 DISTVERSION=	27.0.1
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	multimedia
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Open source streaming/recording software
 
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BROKEN_i386=	https://github.com/obsproject/obs-browser/issues/241
 
 BUILD_DEPENDS=	v4l_compat>=0:multimedia/v4l_compat \
 		swig:devel/swig
 LIB_DEPENDS=	libavcodec.so:multimedia/ffmpeg \
 		libcurl.so:ftp/curl \
 		libdbus-1.so:devel/dbus \
 		libfdk-aac.so:audio/fdk-aac \
 		libfontconfig.so:x11-fonts/fontconfig \
 		libfreetype.so:print/freetype2 \
 		libjansson.so:devel/jansson \
 		libmbedtls.so:security/mbedtls \
 		libspeexdsp.so:audio/speexdsp \
 		libsysinfo.so:devel/libsysinfo \
 		libudev.so:devel/libudev-devd \
 		libv4l2.so:multimedia/libv4l \
 		libvlc.so:multimedia/vlc \
 		libwayland-client.so:graphics/wayland \
 		libx264.so:multimedia/libx264 \
 		libxcb-ewmh.so:x11/xcb-util-wm \
 		libxcb-image.so:x11/xcb-util-image \
 		libxcb-keysyms.so:x11/xcb-util-keysyms \
 		libxcb-render-util.so:x11/xcb-util-renderutil \
 		libxcb-util.so:x11/xcb-util \
 		${LIB_DEPENDS_${ARCH}}
 LIB_DEPENDS_amd64=	libluajit-5.1.so:lang/luajit
 LIB_DEPENDS_armv7=	libluajit-5.1.so:lang/luajit
 LIB_DEPENDS_i386=	libluajit-5.1.so:lang/luajit
 LIB_DEPENDS_powerpc=	libluajit-5.1.so:lang/luajit
 LIB_DEPENDS_powerpc64=	libluajit-5.1.so:lang/luajit-openresty
 LIB_DEPENDS_powerpc64le=	libluajit-5.1.so:lang/luajit-openresty
 
 USES=		cmake compiler:c++17-lang gl gnome lua pkgconfig python:3.4+ \
 		qt:5 xorg
 USE_QT=		core gui svg widgets x11extras xml buildtools_build imageformats_run qmake_build
 USE_GNOME=	glib20
 USE_GL=		gl
 USE_XORG=	ice sm x11 xcb xcomposite xext xfixes xinerama xrandr
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	obsproject
 GH_TUPLE=	obsproject:obs-browser:f1a61c5:obs_browser/plugins/obs-browser \
 		obsproject:obs-vst:aaa7b7f:obs_vst/plugins/obs-vst
 
 CMAKE_ON=	UNIX_STRUCTURE
 CMAKE_OFF=	ENABLE_PIPEWIRE # beginning with 27.0.1 (PR#4287) the linux-capture plugin optionally requires the piperware library and in this case expects the linux/dma-buf.h header
 CMAKE_ARGS=	-DOBS_VERSION_OVERRIDE:STRING="${PORTVERSION}"
 
 LDFLAGS+=	-fPIC # pending https://github.com/obsproject/obs-studio/issues/3436
 
 OPTIONS_DEFINE=		BROWSER VST
 OPTIONS_DEFAULT=	VST
 OPTIONS_MULTI=		AUDIO
 OPTIONS_MULTI_AUDIO=	JACK PULSEAUDIO SNDIO
 OPTIONS_DEFAULT+=	JACK PULSEAUDIO SNDIO
 OPTIONS_SUB=		yes
 AUDIO_DESC=		Audio backends
 
 BROWSER_DESC=		Build OSB browser
 BROWSER_CMAKE_BOOL=	BUILD_BROWSER
 BROWSER_BROKEN=		Needs CEF (Chromium Embedded Framework) which isn't yet ported
 
 JACK_LIB_DEPENDS=	libjack.so:audio/jack
 JACK_CMAKE_ON=		-DENABLE_JACK=TRUE
 JACK_CMAKE_OFF=		-DDISABLE_JACK=TRUE
 
 PULSEAUDIO_LIB_DEPENDS=	libpulse.so:audio/pulseaudio
 PULSEAUDIO_CMAKE_ON=	-DENABLE_PULSEAUDIO=TRUE
 PULSEAUDIO_CMAKE_OFF=	-DDISABLE_PULSEAUDIO=TRUE
 PULSEAUDIO_BROKEN_OFF=	https://github.com/obsproject/obs-studio/issues/4025
 
 SNDIO_LIB_DEPENDS=	libsndio.so:audio/sndio
 SNDIO_CMAKE_ON=		-DENABLE_SNDIO=TRUE
 SNDIO_CMAKE_OFF=	-DDISABLE_SNDIO=TRUE
 
 VST_DESC=		Build VST submodule
 VST_CMAKE_BOOL=		BUILD_VST
 
 .include <bsd.port.pre.mk>
 
 .if ${ARCH} != amd64 && ${ARCH} != armv7 && ${ARCH} != i386 && ${ARCH} != powerpc && ${ARCH} != powerpc64
 PLIST_SUB+=	LUAJIT="@comment "
 .else
 PLIST_SUB+=	LUAJIT=""
 .endif
 
 post-patch:
 	@${REINPLACE_CMD} -e 's| 3.4)| ${PYTHON_VER})|' \
 		${WRKSRC}/cmake/Modules/FindPythonDeps.cmake
 
 post-install:
 	# https://github.com/obsproject/obs-studio/issues/2625
 	${INSTALL_DATA} ${WRKSRC}/UI/obs-frontend-api/obs-frontend-api.h ${STAGEDIR}${PREFIX}/include/obs
 	# https://github.com/obsproject/obs-studio/issues/2647 (only for multimedia/obs-audio-spectralizer, should be removed later)
 	${INSTALL_DATA} ${WRKSRC}/cmake/Modules/ObsHelpers.cmake ${STAGEDIR}${PREFIX}/lib/cmake
 	${INSTALL_DATA} ${WRKSRC}/cmake/external/ObsPluginHelpers.cmake ${STAGEDIR}${PREFIX}/lib/cmake
 
 .include <bsd.port.post.mk>
diff --git a/multimedia/obs-studio/files/patch-plugins_linux-v4l2_v4l2-output.c b/multimedia/obs-studio/files/patch-plugins_linux-v4l2_v4l2-output.c
new file mode 100644
index 000000000000..0c1120159c0c
--- /dev/null
+++ b/multimedia/obs-studio/files/patch-plugins_linux-v4l2_v4l2-output.c
@@ -0,0 +1,109 @@
+- backport patch for OBS Studio Virtual Camera on FreeBSD
+- see https://www.davidschlachter.com/misc/freebsd-obs-virtualcam
+
+diff --git plugins/linux-v4l2/v4l2-output.c b/plugins/linux-v4l2/v4l2-output.c
+index 05ac70b42f0..0ddd3152384 100644
+--- plugins/linux-v4l2/v4l2-output.c
++++ plugins/linux-v4l2/v4l2-output.c
+@@ -27,6 +27,7 @@ static void virtualcam_destroy(void *data)
+ 	bfree(data);
+ }
+ 
++#ifdef __linux__
+ static bool is_flatpak_sandbox(void)
+ {
+ 	static bool flatpak_info_exists = false;
+@@ -98,6 +99,32 @@ static int loopback_module_load()
+ 	return run_command(
+ 		"pkexec modprobe v4l2loopback exclusive_caps=1 card_label='OBS Virtual Camera' && sleep 0.5");
+ }
++#else
++bool loopback_module_available()
++{
++	struct v4l2_capability capability;
++	char new_device[16];
++	int fd;
++	int i;
++
++	for (i = 0; i != MAX_DEVICES; i++) {
++		snprintf(new_device, 16, "/dev/video%d", i);
++		fd = open(new_device, O_RDWR);
++		if (fd < 0)
++			continue;
++		if (ioctl(fd, VIDIOC_QUERYCAP, &capability) < 0) {
++			close(fd);
++			continue;
++		}
++		if (capability.capabilities & V4L2_CAP_VIDEO_OUTPUT) {
++			close(fd);
++			return true;
++		}
++		close(fd);
++	}
++	return false;
++}
++#endif
+ 
+ static void *virtualcam_create(obs_data_t *settings, obs_output_t *output)
+ {
+@@ -131,13 +158,19 @@ static bool try_connect(void *data, int device)
+ 	if (vcam->device < 0)
+ 		return false;
+ 
+-	if (ioctl(vcam->device, VIDIOC_QUERYCAP, &capability) < 0)
++	if (ioctl(vcam->device, VIDIOC_QUERYCAP, &capability) < 0) {
++		close(vcam->device);
++		vcam->device = -1;
+ 		return false;
++	}
+ 
+ 	format.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ 
+-	if (ioctl(vcam->device, VIDIOC_G_FMT, &format) < 0)
++	if (ioctl(vcam->device, VIDIOC_G_FMT, &format) < 0) {
++		close(vcam->device);
++		vcam->device = -1;
+ 		return false;
++	}
+ 
+ 	struct obs_video_info ovi;
+ 	obs_get_video_info(&ovi);
+@@ -149,16 +182,22 @@ static bool try_connect(void *data, int device)
+ 	parm.parm.output.timeperframe.numerator = ovi.fps_den;
+ 	parm.parm.output.timeperframe.denominator = ovi.fps_num;
+ 
+-	if (ioctl(vcam->device, VIDIOC_S_PARM, &parm) < 0)
++	if (ioctl(vcam->device, VIDIOC_S_PARM, &parm) < 0) {
++		close(vcam->device);
++		vcam->device = -1;
+ 		return false;
++	}
+ 
+ 	format.fmt.pix.width = width;
+ 	format.fmt.pix.height = height;
+ 	format.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+ 	format.fmt.pix.sizeimage = vcam->frame_size;
+ 
+-	if (ioctl(vcam->device, VIDIOC_S_FMT, &format) < 0)
++	if (ioctl(vcam->device, VIDIOC_S_FMT, &format) < 0) {
++		close(vcam->device);
++		vcam->device = -1;
+ 		return false;
++	}
+ 
+ 	struct video_scale_info vsi = {0};
+ 	vsi.format = VIDEO_FORMAT_YUY2;
+@@ -176,11 +215,12 @@ static bool virtualcam_start(void *data)
+ {
+ 	struct virtualcam_data *vcam = (struct virtualcam_data *)data;
+ 
++#ifdef __linux__
+ 	if (!loopback_module_loaded()) {
+ 		if (loopback_module_load() != 0)
+ 			return false;
+ 	}
+-
++#endif
+ 	for (int i = 0; i < MAX_DEVICES; i++) {
+ 		if (!try_connect(vcam, i))
+ 			continue;