From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from prime.voidband.net (prime.voidband.net [199.247.17.104]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 044AB29BDAD; Sun, 1 Feb 2026 20:26:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.247.17.104 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769977604; cv=none; b=H6YvRe0L1j69PRMNzI7zMpYMY6c/tZ2e2jrJ5wEPx/8KvZeUgqIrjzLF9sz9F0gadfFjtcLW2X0XUss6rb0T3i2LUfuM98UKKsn5j2449LWnrSp5dH03aKbCms9ps7BTxbWl7Or4fyaq/72N8Ws+p2KSgImgKe8m4exZ6IZ9b6E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769977604; c=relaxed/simple; bh=eTdFN1sZp8GPTyD++cmIhCvu7iub8NIyPO5dZ+ZvlQ0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Vugg9h4kERrpk3/QpilALvuDhUoNWOG7aPMcBUf1PBIeYCDQGxDqTxJJo75D/OKGyrFKbgHUdXN9H+32QTZPjxXckGp+ebZy/bQUUAbmEUatjH+rUthdMuq3KMoLvH8aEM/l+zsQ0CqKv4OygHNd3DtZNCgPHD5AlW3kHVczb1s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=natalenko.name; spf=pass smtp.mailfrom=natalenko.name; dkim=pass (1024-bit key) header.d=natalenko.name header.i=@natalenko.name header.b=L8QneXuv; arc=none smtp.client-ip=199.247.17.104 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=natalenko.name Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=natalenko.name Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=natalenko.name header.i=@natalenko.name header.b="L8QneXuv" Received: from spock.localnet (unknown [212.20.115.26]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by prime.voidband.net (Postfix) with ESMTPSA id 9B4D8635B040; Sun, 01 Feb 2026 21:26:39 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=natalenko.name; s=dkim-20170712; t=1769977599; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=GYdHa+RPQNAH3ET9O4HNM2AYdoTotHMTKn8sSup15jg=; b=L8QneXuvzRn+63o/SADgXmZ6Sy2nrKLM9zg1dLtxCK0OsyHyF9rbhCMUWn8aCjKEnQS0Fn urjDK2XKcv8mH1AQzqTXTjqAJBvSklIeqe+BSrUkX+UnGf+aQ0RHAD7TDXwUrSsvQebfOV 7ao2RfbsG0kLd6yeIieaEEQqCSdUPMU= From: Oleksandr Natalenko To: Mauro Carvalho Chehab Cc: Laurent Pinchart , Jarkko Sakkinen , linux-media@vger.kernel.org, jani.nikula@linux.intel.com, anisse@astier.eu, Mauro Carvalho Chehab , Hans Verkuil , Sakari Ailus , Jacopo Mondi , Ricardo Ribalda , open list Subject: Re: [RFC PATCH] media: Virtual camera driver Date: Sun, 01 Feb 2026 21:26:24 +0100 Message-ID: <5073898.31r3eYUQgx@natalenko.name> In-Reply-To: <20260201212133.1849a49e@foz.lan> References: <20260201133342.335680-1-jarkko@kernel.org> <12828248.O9o76ZdvQC@natalenko.name> <20260201212133.1849a49e@foz.lan> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart4709716.LvFx2qVVIh"; micalg="pgp-sha512"; protocol="application/pgp-signature" x-ms-reactions: disallow --nextPart4709716.LvFx2qVVIh Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8"; protected-headers="v1" From: Oleksandr Natalenko To: Mauro Carvalho Chehab Subject: Re: [RFC PATCH] media: Virtual camera driver Date: Sun, 01 Feb 2026 21:26:24 +0100 Message-ID: <5073898.31r3eYUQgx@natalenko.name> In-Reply-To: <20260201212133.1849a49e@foz.lan> MIME-Version: 1.0 On ned=C4=9Ble 1. =C3=BAnora 2026 21:21:33, st=C5=99edoevropsk=C3=BD standa= rdn=C3=AD =C4=8Das Mauro Carvalho Chehab wrote: > > 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? >=20 > Using a kernel driver for something like that is a bad idea and may end > causing dead lock problems. You may also have performance issues and > high network traffic. The best solution for it is to use a proper > userspace tool, like obs: >=20 > https://obsproject.com/kb/linux-installation Ignoring the fact I've never had any performance issues, and I don't care m= uch about how big the traffic is in my isolated VLAN dedicated to this spec= ific task, the OBS solution still uses v4l2loopback under the hood. Could y= ou please tell me what do I miss in this regard? Thank you. =2D-=20 Oleksandr Natalenko, MSE --nextPart4709716.LvFx2qVVIh Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. 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