From patchwork Wed Sep 2 22:57:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrei Rybak X-Patchwork-Id: 22067 Return-Path: X-Original-To: patchwork@ffaux-bg.ffmpeg.org Delivered-To: patchwork@ffaux-bg.ffmpeg.org Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by ffaux.localdomain (Postfix) with ESMTP id 3A4D94477F7 for ; Thu, 3 Sep 2020 02:04:44 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 1DD0268A4FF; Thu, 3 Sep 2020 02:04:44 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wm1-f67.google.com (mail-wm1-f67.google.com [209.85.128.67]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id BE257689F1A for ; Thu, 3 Sep 2020 02:04:37 +0300 (EEST) Received: by mail-wm1-f67.google.com with SMTP id s13so932516wmh.4 for ; Wed, 02 Sep 2020 16:04:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=2KPEYKiuM1NeD2XDwhXSkB0hYa8Zqu3T08wkQYdeV9g=; b=X2BUCJkwFzMsh5qMlLWhfH1PVZrqPXVLo8z0y9K+Do/g9Frt3/fJQBRXV41iQsp6yf NZqBQN3T9uw0zSx2qmGWbbpc1nDd4WREMcx98NRsZvVWIqnKhEQY2guIA55NnX9/H44Y a28zJJBd2iXow2Eom1Wk97rS40/Ks3hgEvAXRuuBaUHbMFFy8vg9FLekqGMTMv2q1vi/ ZTNRBJqNCPOTUeMmCAxBpNmCxvyP7zS4r7mRdZolZ/s5evACwvCnF2+zpvZCcQK1k9Rk rWEFCVmMEJQ871qTZS8TXUEeFlD+9b5fFDjl4b+d8G0hdCKY8tvF6RrvYw7aDNy01nms GIZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=2KPEYKiuM1NeD2XDwhXSkB0hYa8Zqu3T08wkQYdeV9g=; b=nwfu10hdTnf3IBcevWZX2N6ohT5uJxwrFLnXv0X7jP4BJHuqGwAbvWOLNRatofT15W GELeQJUVIe9sMaIWKn5ud+vPzahvqf5dKiydTXa185xmPbdRbUiJEKqcq/AnQMsNmWyG Ez4ivUO+Zbaq0+a3mcCU49VxOn7Q4ySIfsQtonJg82gI+6uDdD8oQBgCjiS/Wp4lXFwE 5wy41xZQWD2fwmFTKze2UWJmv4z6BH0xmVC8ipJyoUMvPG3gtfb8MLSfP0rk5BYPcp5m Sobs1CDuG0BNGGoj6CmG5qRLFO/durA4gD5Q9B8kBZm7/3yBbAlrp82Ku5EtssQi81sz pjYA== X-Gm-Message-State: AOAM530OYzZYWHPo2Bne4CaJ7oUOwLxGNm1p6gQHDOIbiKtksT8hsz4K LvOc0PbDJVyXpGbuB9oOdgbNp7+ZV3Zl7Q== X-Google-Smtp-Source: ABdhPJwrDIpkiDj4BOOBHa1FOQVIGPi9Uztnh1UN9LIXzT5uX9xr+wXfTViBdY1DB3v/KVIPV/7ZGA== X-Received: by 2002:a1c:2983:: with SMTP id p125mr354225wmp.21.1599087443849; Wed, 02 Sep 2020 15:57:23 -0700 (PDT) Received: from titov.fritz.box ([89.36.76.58]) by smtp.gmail.com with ESMTPSA id h6sm1469733wmb.22.2020.09.02.15.57.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Sep 2020 15:57:23 -0700 (PDT) From: Andrei Rybak To: ffmpeg-devel@ffmpeg.org Date: Thu, 3 Sep 2020 00:57:17 +0200 Message-Id: <20200902225717.223162-1-rybak.a.v@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH] avfilter/vf_drawtext: document expr for fontsize X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 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 Cc: Andrei Rybak Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Expressions for parameter fontsize of video filter drawtext have been supported since commit 6442e4ab3c (avfilter/vf_drawtext: added expr evaluation to drawtext fontsize, 2017-04-18). Add an example of using such expressions to documentation. Signed-off-by: Andrei Rybak --- doc/filters.texi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/doc/filters.texi b/doc/filters.texi index fb8757ff8f..ec386a6c55 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -10233,6 +10233,12 @@ Use fontconfig to set the font. Note that the colons need to be escaped. drawtext='fontfile=Linux Libertine O-40\:style=Semibold:text=FFmpeg' @end example +@item +Draw "Test Text" of size, dependent on height of the video. +@example +drawtext="text='Test Text': fontsize=h/30: x=(w-text_w)/2: y=(h-text_h*2)" +@end example + @item Print the date of a real-time encoding (see strftime(3)): @example