linux-kernel - Re: [RFC PATCH] media: Virtual camera driver

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Message-ID: <20260201202200.GX3374091@killaraus>
Date: Sun, 1 Feb 2026 22:22:00 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Oleksandr Natalenko <oleksandr@...alenko.name>
Cc: Jarkko Sakkinen <jarkko@...nel.org>, linux-media@...r.kernel.org,
	jani.nikula@...ux.intel.com, anisse@...ier.eu,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil@...nel.org>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Jacopo Mondi <jacopo.mondi@...asonboard.com>,
	Ricardo Ribalda <ribalda@...omium.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] media: Virtual camera driver

On Sun, Feb 01, 2026 at 09:14:54PM +0100, Oleksandr Natalenko wrote:
> On neděle 1. února 2026 21:06:49, středoevropský standardní čas Laurent Pinchart wrote:
> > > There is a notable user base for v4l2-loopback. It is the defacto choice
> > > for streaming phone cams.
> > 
> > This will then likely face the same hurdles as v4l2-loopback, the main
> > one being that camera support should be upstreamed with proper drivers
> > instead of a closed-source userspace daemon.
> > 
> > For phone cameras, the way forward upstream is libcamera. Until kernel
> > drivers for ISPs are available, the soft ISP is a stop-gap solution. It
> > recently gained GPU acceleration support (with work to improve image
> > quality with additional algorithms ongoing).
> 
> My use-case for v4l2loopback is to stream a webcam from one machine to
> another (with the help of ffmpeg). Is this covered by something other
> than v4l2loopback now?

On the transmitting side I assume you don't use v4l2loopback. On the
receiving side, the recommened option is PipeWire.

-- 
Regards,

Laurent Pinchart