From owner-freebsd-multimedia@freebsd.org Fri Mar 1 10:02:50 2019 Return-Path: Delivered-To: freebsd-multimedia@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 097F31506C28 for ; Fri, 1 Mar 2019 10:02:50 +0000 (UTC) (envelope-from thomas.e.zander@googlemail.com) Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9774A6DB45 for ; Fri, 1 Mar 2019 10:02:48 +0000 (UTC) (envelope-from thomas.e.zander@googlemail.com) Received: by mail-pf1-x436.google.com with SMTP id a3so11185614pff.11 for ; Fri, 01 Mar 2019 02:02:48 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=WTXNpMElwpGUz7yTCDKdZ4mW+/IfEFZJ9LK554UV3M8=; b=dVhj8uv5Hn9toXTlso06uh92SNkPaY/kJ5+0+zp0gByWOmzwtBh4OCq7mCTbqkWLlZ qCwarhDlscEkjEVoz7p+77YA9pdf/4+fQ/tWpym4RWweAfLSKktx6ECzxE31uXO3tjOQ Gd4jQYdP4v1zGuvGKAy9ykPfsZcpaBWRyeOZ5xy1xzBUJT1Bb2bNPHJD4yWfhFCtPCT9 r9UbVSMvhTkl6EXMbJUYPNn/OcSi16c8QqEn85y1DQ+EBTD0qhCoMeclAejmim3IUdaw SrEXwojq8IqB954RDcKpyENxf0oQpNshkYM2hPon9JQ9M70TUO6eNAITVySeYT28EuP9 WWTg== X-Gm-Message-State: APjAAAUPkejizDh7EnxsDyhgqDcLvCNgI/5cJjHE8XzcA89V3ZE9VcvD mhq66jCSRiZae4UjWu7e4ModfJOZdKtk/nyrpyrgdg== X-Google-Smtp-Source: APXvYqzNl25eao8XZxRgGMQv0uZCbrodBRV4owzIV9Un2+CVWLTmaNWgIKsjPURm90X+RRbS3sXqbeq0ll4kW7o3rB8= X-Received: by 2002:a63:fc62:: with SMTP id r34mr4089546pgk.154.1551434565855; Fri, 01 Mar 2019 02:02:45 -0800 (PST) MIME-Version: 1.0 References: <005401d4c957$c6bbc840$543358c0$@gmail.com> In-Reply-To: <005401d4c957$c6bbc840$543358c0$@gmail.com> From: Thomas Zander Date: Fri, 1 Mar 2019 11:02:32 +0100 Message-ID: Subject: Re: FFmpeg hardware transcoding To: driesm.michiels@gmail.com Cc: freebsd-multimedia@freebsd.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 9774A6DB45 X-Spamd-Bar: ------ X-Spamd-Result: default: False [-6.37 / 15.00]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; FREEMAIL_FROM(0.00)[googlemail.com]; TO_DN_NONE(0.00)[]; MX_GOOD(-0.01)[cached: alt3.gmail-smtp-in.l.google.com]; DKIM_TRACE(0.00)[googlemail.com:+]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-0.47)[-0.466,0]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; TAGGED_FROM(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[googlemail.com:s=20161025]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TAGGED_RCPT(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-multimedia@freebsd.org]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[6.3.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; IP_SCORE(-2.90)[ip: (-9.67), ipnet: 2607:f8b0::/32(-2.71), asn: 15169(-2.03), country: US(-0.07)]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Mar 2019 10:02:50 -0000 On Wed, 20 Feb 2019 at 21:07, wrote: > What is the minimum requirements for being able to utilize quick sync on my > intel chip for ffmpeg hardware transcoding? One point to consider is the desired output quality. I recently ran some transcoding experiments on a MacBook (2018 Model, i5 CPU) using ffmpeg and the "hevc_videotoolbox" encoder which uses quick sync on this platform. The results were consistently unacceptable. x265 software encoding delivers better results for all scenarios I have tried, even with preset fast. After the results I have had, I see no further use for quick sync other than real-time encoding (e.g. streaming). Riggs