From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id 16E1643579 for ; Mon, 18 Jul 2022 09:53:26 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 75E7268B761; Mon, 18 Jul 2022 12:53:22 +0300 (EEST) Received: from smtp-out6.electric.net (smtp-out6.electric.net [192.162.217.192]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 84B0168B73D for ; Mon, 18 Jul 2022 12:53:16 +0300 (EEST) Received: from 1oDNRC-00040G-V6 by out6d.electric.net with emc1-ok (Exim 4.94.2) (envelope-from ) id 1oDNRD-00041u-TA for ffmpeg-devel@ffmpeg.org; Mon, 18 Jul 2022 02:53:15 -0700 Received: by emcmailer; Mon, 18 Jul 2022 02:53:15 -0700 Received: from [212.161.31.33] (helo=SS-XFILES1.bfi.org.uk) by out6d.electric.net with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1oDNRC-00040G-V6 for ffmpeg-devel@ffmpeg.org; Mon, 18 Jul 2022 02:53:14 -0700 Received: from SS-XFILES1.bfi.org.uk (172.16.5.104) by SS-XFILES1.bfi.org.uk (172.16.5.104) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.6; Mon, 18 Jul 2022 10:53:14 +0100 Received: from SS-XFILES1.bfi.org.uk ([fe80::c0f5:c4c5:8260:5e4f]) by SS-XFILES1.bfi.org.uk ([fe80::c0f5:c4c5:8260:5e4f%6]) with mapi id 15.01.2507.006; Mon, 18 Jul 2022 10:53:14 +0100 From: Stephen McConnachie To: "'ffmpeg-devel@ffmpeg.org'" Thread-Topic: Development opportunity: LTC noise on files created from videotape source: filter idea Thread-Index: AdiaijpZXqtm8VxCQM+vbQ1ygjqbsw== Date: Mon, 18 Jul 2022 09:53:14 +0000 Message-ID: <53e29d553f5944a5b0aaa75c7fa48bc1@bfi.org.uk> Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.16.5.199] X-Outbound-IP: 212.161.31.33 X-Env-From: Stephen.McConnachie@bfi.org.uk X-Proto: esmtps X-Revdns: stargate.bfi.org.uk X-HELO: SS-XFILES1.bfi.org.uk X-TLS: TLS1.2:ECDHE-RSA-AES128-GCM-SHA256:128 X-Authenticated_ID: X-PolicySMART: 3432616, 27538057, 23552168 MIME-Version: 1.0 Content-Language: en-US X-Virus-Status: Scanned by VirusSMART (c) X-Virus-Status: Scanned by VirusSMART (b) X-PolicySMART: 3432616, 27538057, 23552168 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=bfi.org.uk; s=bfiselector01; h=MIME-Version:Message-ID:Date:To:From; bh=UOs44Yl8+CifxnWg5V7tvH0gkYxw4Yqs0CpjPI7DVTw=; b=MAPtLKs1lgU4A1bD7k5bzAwqvY6IRl9XxDzyWRB8g7LjPu1ftNHCXAJP2nitkpwibFDMP7z9/W0/iaX/SBoE3pagM/Gd4372+JBiyZwuA8oZpB3Q9hDtsHV0Z703isXiqQTzLRfkG6MOka7vj/QhJWQrg76SOKemg9CE8eZLeA5RaFg/81gmCTwE73loQYRROgHsuS+N5IuXVppgcXGd7O8sSMSi+cYjhoJIJiEa/ln/tHURiEkhLLTwxZre2Ybpti38mcbiZ/xrnyOB9QnGH2DcGDMl5l9pvguKI1vewB8ImjYrrN0uNFhH3lkTjs5WqawYUk5YviUyZjK3rl7ekA==; X-Content-Filtered-By: Mailman/MimeDel 2.1.29 Subject: [FFmpeg-devel] Development opportunity: LTC noise on files created from videotape source: filter idea X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Hi FFMPEG developers, I have a proposal for a paid development opportunity to add a filter to FFMPEG. I followed the advice on the FFMPEG Consulting page at https://ffmpeg.org/consulting.html and am emailing this list to try to identify if any of the FFMPEG developers may be able to take on a development commission. Background: we are digitising high volumes of videotape carriers, and have identified a common case in some videotape formats where Linear Time Code from the tape carrier is present on audio stream 1 in the encoded file - manifesting as a continuous noise. Idea: could a filter be developed in FFMPEG, based on example files we can provide, to identify the presence of an LTC-derived audio stream, and additionally identify which of the streams is the LTC stream. If this filter idea sounds achievable, I would aim to identify which of the FFMPEG developers may be able to take on this work, and estimated costs and timeline. All the best, Stephen The British Film Institute is governed by Royal Charter and is a charity registered in England and Wales number 287780. 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