From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.ffmpeg.org (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTPS id B74544C495 for ; Mon, 13 Oct 2025 19:16:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ffmpeg.org; i=@ffmpeg.org; q=dns/txt; s=mail; t=1760383000; h=mime-version : to : date : message-id : in-reply-to : references : reply-to : subject : list-id : list-archive : list-archive : list-help : list-owner : list-post : list-subscribe : list-unsubscribe : from : cc : content-type : content-transfer-encoding : from; bh=bzPmfFq72+ZujJ3X42poTdToHdie5KYQ8x8REvexVr0=; b=vLcYKnMpGWM0hfi29LDMtH6DRYdb4OUl+ULPV6yfnvu6m1ll0Ezh4gD80NyP3XiCTJlhi PXOZ7P8XOh8xmIf4D0k6R5fSpIKwsiBjwh8M5Nz0l0xBSWBGZz8W2kJE+Cy8xrOuhresVE2 VLz2oPzIIeMxsxJVmFuhl7wqQEkmnxzo4z3oxDASgPDU6QeiGnlJGmXsufrQQRPOV6k7O84 EAgR4x/4MHgFQw4IABO4S8nbypdhz2qw2ylXG0Fk1iiILqKwtOPG0LSmrZ3VlS4ON+D4fIk w+dS/4zOlLMIXr1uv0/sT7XQUUbE8OXDFMrqn2mSl2Kwq+PhZki8Vh3do5fA== Received: from [172.19.0.4] (unknown [172.19.0.4]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTP id 51DDA68F221; Mon, 13 Oct 2025 22:16:40 +0300 (EEST) ARC-Seal: i=1; cv=none; a=rsa-sha256; d=ffmpeg.org; s=arc; t=1760382997; b=drQFAp/RpOWgmo7mpiEzsovT+bsx5hUp5L0gwES/vpB0X8Erlp8vQKoYX//RY0iuRy9BC hKi2vLMGSH0vD49ILPsjDwOFsp5p21HvxqYnqYMbd6clAYNV3KtrAGayGz3pMumY6Auwx21 BGH20rIDbsZR2r0EMhGVZeUrG67JtOPJ6xwVF7w2wsueQAVl+HZXrW85oT4rmgnnW+me3jN 662wVWw/5BEV1Yq5et32y5G86TgEqmytBDXaHibHOwbFZyrQ6BijYm/BvU+kqZoFBg8t7UL x1pC765o8ZAAJDcW7CV+3IazRmDTQpfn1vPtIViYwxRs1gJ7+NQB1IyTiiFA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=ffmpeg.org; s=arc; t=1760382997; h=from : sender : reply-to : subject : date : message-id : to : cc : mime-version : content-type : content-transfer-encoding : content-id : content-description : resent-date : resent-from : resent-sender : resent-to : resent-cc : resent-message-id : in-reply-to : references : list-id : list-help : list-unsubscribe : list-subscribe : list-post : list-owner : list-archive; bh=gc0iRZADB85BTrClvSUlfS59miEA0HZE+ySwPFbgUDY=; b=XLtRLYcnKy1whAhu7jakSpJHup24Lj6TDkt4y7+MDFA29lBr7Mg8f/yTRbN7wh180lTsk uAI55nY01+qKfFxWRALKesBMF3LKcAgVkVtGOl649mfMqV+UtQuuGWL4L192YCMnqQsHdcw 9Y3+gcgAyZYHVTXtbtX5Xu0xl1L+CBOFDRMwWeIn1162c34CKlmJhBdSqHBin09DpKW83+2 aQm/QP1JtSFH2ZSlV6t9aynwBfPB32FF6oGOofRYXRgxKtWVbaTV+lYJg4TpATbz8viKE3x pzZnTIsD7XjgoelU7zEHAjrmxrH0+XyWzb7Nnu0It4wgWTkxlBX4pynkRJHQ== ARC-Authentication-Results: i=1; ffmpeg.org; dkim=fail; arc=none; dmarc=none Authentication-Results: ffmpeg.org; dkim=fail; arc=none (Message is not ARC signed); dmarc=none Received: from 61127e804c87 (unknown [172.19.0.3]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTP id E468D68F1D0 for ; Mon, 13 Oct 2025 22:16:29 +0300 (EEST) MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Date: Mon, 13 Oct 2025 19:16:29 -0000 Message-ID: <176038298984.634.17260768641374263283@61127e804c87> In-Reply-To: References: User-Agent: HyperKitty on https://lists.ffmpeg.org/ Message-ID-Hash: LREDOJ2VSVFBNS66XEHYXDMLKGBAKUXC X-Message-ID-Hash: LREDOJ2VSVFBNS66XEHYXDMLKGBAKUXC X-MailFrom: SRS0=JB8N=4W=parabolaresearch.com=john@ffmpeg.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] Re: [PATCH] WIP: avfilter: add Bungee audio stretch filter (PR #20697) List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: john--- via ffmpeg-devel Cc: john@parabolaresearch.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: Thank you for taking a look. Bungee is the result of independent research and optimisation. It was released in Feb 2024 as MPL v2.0. Bungee Pro was released alongside Bungee: although it shares an API, its algorithms are proprietary, its audio quality is industry leading and it is highly optimised for web and mobile platforms. I don't like to compare to other implementations, but since you asked, Nicolas, here are three main differences between libbungee and librubberband: 1. Bungee is a new and different algorithm. In my opinion, the audio quality is improved in many situations, avoiding some of librubberband's artifacts. Here is a random example at 56% input tempo, taken from the comparison page on the Bungee site: https://bungee.parabolaresearch.com/audio/bungee/wrong-0.56-0.aac https://bungee.parabolaresearch.com/audio/rubberband/wrong-0.56-0.aac That said, such comparisons are subjective and very dependent upon the input audio and on the listener. And Bungee is still far from the perfect time stretcher (Bungee Pro is closer but I'll not say more about that...) 2. Bungee can be faster than rubberband: 1.7x faster in a quick test on Mac M4 of a tempo change to 56% of original tempo 3. Bungee has a different license: MPL-2.0 which is compatible with LGPL-2.1. librubberband is GPL-2.0 which requires --enable-gpl This PR is an offer of maybe useful code and I won't be at all offended if Bungee and FFmpeg are not a good fit at this time. John _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org