From patchwork Thu Dec 9 12:12:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Soft Works X-Patchwork-Id: 32235 Delivered-To: ffmpegpatchwork2@gmail.com Received: by 2002:a6b:cd86:0:0:0:0:0 with SMTP id d128csp278355iog; Thu, 9 Dec 2021 04:16:24 -0800 (PST) X-Google-Smtp-Source: ABdhPJxKHytVAeUA7c0Au+cnOSjKs+v9Vu+GUjBT6VSTponkdWZ0iGT5vHL4B2hj9Op53CSmZmBh X-Received: by 2002:a17:907:1b17:: with SMTP id mp23mr14543527ejc.521.1639052184565; Thu, 09 Dec 2021 04:16:24 -0800 (PST) Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org. [79.124.17.100]) by mx.google.com with ESMTP id m19si10412211edb.74.2021.12.09.04.16.24; Thu, 09 Dec 2021 04:16:24 -0800 (PST) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@hotmail.com header.s=selector1 header.b=qzvln0T8; arc=fail (body hash mismatch); spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=hotmail.com Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id D935668AFBB; Thu, 9 Dec 2021 14:13:06 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12olkn2010.outbound.protection.outlook.com [40.92.22.10]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 625E868AE3E for ; Thu, 9 Dec 2021 14:13:00 +0200 (EET) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ENk084eMVGBiC4Dh+387M1gDAJwTc74+Z7n9NqJZduW60RpCrHfEjj4OvFtCUHhElbd2l4TkMV0bqhNa2kh35ZbPoHWbXLsb+TV0EEQ16zbpgrVyG/cd+CPkdNqadD4w0v/HAk6G6XM61revdJBfjKyH5lP5x7NL3ANPtH6RhGpBRMDHovzghcaU88zusFMmRWmtrZuhZyQViTCTzP+C45h2AwL/uB6ExSseLfPTHgbM+CrcgjXJmWN7685FHi39xGHQfTfY+NhQHzLa/l2n51QOx/yk/ynwuYMdwVFXveU2rgfc6tNy+LVo20+EKXiqm1wIp8H5CO6WmQZE6F4Zng== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=ONe0BeXKFaab6qUj4aHizHq2se3kCsgnKqD3ec85bLE=; b=BZ2Gzqp6RQ1t2RZOY5EubS3DZhifq/+QpffYDj3AyS/3dpW/xhwRMD/M2qooXMclDGiwxVglZ0Zwa67LdUba/FrAtVW3WOilAy2P/79+MVguKbg/nKV0vB1hCg96jcmt3GxnAn3WWzb6ReETGiWTbn3wWFDqmXflY8pySTBcR/EH0QecsDdF4mhe9gjhLOL3xhG7Bi38QR7Boo+ofnqHhK3NEjppzrSlADizxtvh4A7wNhaZi181M+AD6sjV7SGAOrGt1LTTeGvBJlG/mifAynVCgZrYvu1fPZWhkrIVy8CHIy6+u+K6pzcbXh1Suoyz7lA2ahKOraqTXBll5+gBLg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none; dkim=none; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hotmail.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=ONe0BeXKFaab6qUj4aHizHq2se3kCsgnKqD3ec85bLE=; b=qzvln0T8n+6w0Hv2tXy/xsyyGqbCOYcGkAbeZ+1+XkSOuypCbDRb4rxgWSQ9u/T9RfSLkBygZ7SEtowJdrLvqsbieDn3SdIc4n5VhDCkCuaHEXiJ/N9JJ0B36C0zfyL+ev4QBHsv6Gv4v5TVERYVmlhan1Kf/HGyDwEcaP9BCRuguErn9var4YiDtKNED48ogd8+IHV1nUo3cZ0ajVzEQvN9HrdKs3zD8OwlQuqXugLoO54pgTNNZ2UlWpQUQg/4dGH5tnBPh+TdrjuMeE5MKEvZMlqJzagw4OxSEYAnjfh0MwMpSrbyVCe1LFhpU714H82/MuEG8VZmegdquobbag== Received: from DM8P223MB0365.NAMP223.PROD.OUTLOOK.COM (2603:10b6:8:b::20) by DM8P223MB0383.NAMP223.PROD.OUTLOOK.COM (2603:10b6:8:b::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4755.20; Thu, 9 Dec 2021 12:12:58 +0000 Received: from DM8P223MB0365.NAMP223.PROD.OUTLOOK.COM ([fe80::9c8d:fc63:9488:9775]) by DM8P223MB0365.NAMP223.PROD.OUTLOOK.COM ([fe80::9c8d:fc63:9488:9775%8]) with mapi id 15.20.4755.025; Thu, 9 Dec 2021 12:12:58 +0000 From: Soft Works To: "ffmpeg-devel@ffmpeg.org" Thread-Topic: [PATCH v22 17/23] avfilter/stripstyles: Add stripstyles filter Thread-Index: AQHX7PYayRFdUR4MfE60u/ZHkucQRg== Date: Thu, 9 Dec 2021 12:12:58 +0000 Message-ID: References: <05fff8a8e41014ff699b57bd805f0411865328af.1639051681.git.softworkz@hotmail.com> <18ca2f636f4ef69cbd1b146fe2b3384e242bc377.1639051681.git.softworkz@hotmail.com> <3f3d922baa2061dc8a4e4243c2fcd9813e59ebc3.1639051681.git.softworkz@hotmail.com> <36b0675ac77e7856359413d13b3c655cd3f32abc.1639051681.git.softworkz@hotmail.com> <3549fd8493f7ddba0a9c8facc7be023f6d8c3d01.1639051681.git.softworkz@hotmail.com> <7100eefc62a46f3454521f15bb67b699247a6c2e.1639051681.git.softworkz@hotmail.com> <11d7684d824fda57056ea6dea1c8c8e132c982a0.1639051681.git.softworkz@hotmail.com> <32dc31a9ab2bf74e6fc3ddcd58177983cdc3849e.1639051681.git.softworkz@hotmail.com> <71eae8f27929669d9765cda5a49dc0f45c925398.1639051681.git.softworkz@hotmail.com> <9247eeb569a0a9ed82df80e6e1f87e09283c9bcb.1639051681.git.softworkz@hotmail.com> In-Reply-To: <9247eeb569a0a9ed82df80e6e1f87e09283c9bcb.1639051681.git.softworkz@hotmail.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [Fgqv11YNS08e5Bq3bWW2wnlq6PuA4SWy] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 14328e70-38cb-40ee-b841-08d9bb0d3d27 x-ms-traffictypediagnostic: DM8P223MB0383:EE_ x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: WAMoGInaXvl8Zsd37CNYMRGQUb2LXjw1PaiG0PyAQ80JmO8NBGwg7QMiK0YoI0ctH6vbWC54xRA0HeRql31FZ90QXG5A7jy5uN+xN8wpBpf1v+Js94Yqdvf6Y6YHuvpdDawjv/eP+tjObynVghKIW0ROz12WD/ZueSlA5bQSnku16pCAZshqTQXU6gJ2d+BF+8a5UXodSz7q/haUqvVywyCkf/mgDsdz29BapXrKaK/v0x27RYpFyQBtMlUZyNovWud/qCViL/UHBiP8IhPpljmk0lRpFR849CWKsEi7gV226Tk8yNT1Ak6Tb/FZXDgeq+3Hs5VtvDJjTfsM6BOcIt/ZOqQxdrVSq2F+LB76hydPF1a2Z9vdZIbsaY4wY73HzEaR2TliE9TaPEqltnDIbKIyKLT5qlGPMjW95573Y+urc/MfVpwWyrhqaMNPM96uJ4Zk2+YS5FRw8rbpCaT+V2sy+jjC3XnmSPHD0m4gtemgzgV8KLhL35RcKwq+PDu4dBR3e1DVrQmrtmxIGEOGFBquHhT23Q2IZShCkYHlehAg54ERl3uGN/LpdFy1F+AHqaidzAZMRV/1zRrZa+3XgLuG5lnM6d50uieS9ESa+7iWdCQz1G+IZ7buW6RagwY9a5zTxD3MVqYfC+Q8DONnm8CmqtMrMluzVOl8kkzNPnI= x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?utf-8?q?MGwDHiEQyV1AT/55nvvsvflwe0Ua?= =?utf-8?q?ts2pOwEJmiO7L0umj0X0xM28M38clGF19EdlKSt/tqExZ++QblygLseNeewGP5rzh?= =?utf-8?q?TZLR/wcRibYKfKfxqoC7vPzSD6PZLKpS+ZddU108ww44h/vopuMFwj/53Hvn1gosq?= =?utf-8?q?MYhiqPvw8PZdArntiwyVGemtsYopxdGo3UgcwEh2FWGd/GaxOonptJMGd0oKzAJK3?= =?utf-8?q?WPByLFiJQArhgNHyiYcwVll+3skvEA72TP9v44xbEtVrNigGqghgkI4uqjgfti1zP?= =?utf-8?q?vhFquyt17LZIUlpC2cYJblCznHV+uaSKpYWxEFvdOvi96VJbM6Z5AZCXtRu87PxPS?= =?utf-8?q?tgEqBHyLMTfxCAkluxgRw6HvkltMkqYlVriyUExnJO/BLFH+md1RwurlRCWbOZudF?= =?utf-8?q?j93/RCVYZujscMWvf4QIJEwBnfrruPVppleVym1lP7Xlv7996uXpSCeHNSXdRRkRC?= =?utf-8?q?BXX3t3hKGoCsi0u7SbubHZzxENMNiu94VXhovJqPdBPHJbJ5M6mdGF3TUdAgxHKkj?= =?utf-8?q?jZCw2ql6jA/AvpU97AX26/jnldjvqvR+WSQW5MRXYuVzY9nOm2t+/PJ73I5jwhE3m?= =?utf-8?q?fZARgOPuD6dN65WWkiw8C5H1leLKXp4/WOPJ2MFegrNcAqk8jeV0XBLNsgo/d/3Mj?= =?utf-8?q?b+dMVeOVD1MolI/dnxcnqowYQstoMxv1zXWw5vVah5S0QCQDdq992Y3hwGV3CbRUe?= =?utf-8?q?7w/dCr5etFYHvI5lt4lHyD0jMgyMeNfWDSbb3m0uZC6CVyoFnGZHNAcJkp8AR8dWp?= =?utf-8?q?bajn0/9CRIpzAsVC5YONdGgspLqGjQYx8oxG6TiVZQIqV7R2gNsOU4DtmqIOLIKB3?= =?utf-8?q?vRy3LPqpb4XJJN4ngDJZLl2d3tehbrGCJG2ZuQL0G4QrA+5S+voyIcywc/j8gbT1T?= =?utf-8?q?wGj3EJXO/VNC2O5AAC6zT7K0IZcM1wxLevsMpwr376Zg=3D=3D?= MIME-Version: 1.0 X-OriginatorOrg: sct-15-20-4755-11-msonline-outlook-1ff67.templateTenant X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM8P223MB0365.NAMP223.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-CrossTenant-Network-Message-Id: 14328e70-38cb-40ee-b841-08d9bb0d3d27 X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Dec 2021 12:12:58.4160 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM8P223MB0383 Subject: [FFmpeg-devel] [PATCH v22 17/23] avfilter/stripstyles: Add stripstyles filter 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 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: C8hXWcTR5/8J - stripstyles {S -> S) Remove all inline styles from subtitle events Signed-off-by: softworkz --- doc/filters.texi | 37 +++++++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/sf_stripstyles.c | 196 +++++++++++++++++++++++++++++++++++ 4 files changed, 235 insertions(+) create mode 100644 libavfilter/sf_stripstyles.c diff --git a/doc/filters.texi b/doc/filters.texi index e87d3993df..241c5d469b 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -25704,6 +25704,43 @@ ffmpeg -i "http://streams.videolan.org/samples/sub/SSA/subtitle_testing_complex. @end example @end itemize +@section stripstyles + +Remove all inline styles from subtitle events. + +Inputs: +@itemize +@item 0: Subtitles[TEXT] +@end itemize + +Outputs: +@itemize +@item 0: Subtitles[TEXT] +@end itemize + +It accepts the following parameters: + +@table @option +@item remove_animated +Also remove text which is subject to animation (default: true) +Usually, animated text elements are used used in addition to static subtitle lines for creating effects, so in most cases it is safe to remove the animation content. +If subtitle text is missing, try setting this to false. + +@item select_layer +Process only ASS subtitle events from a specific layer. This allows to filter out certain effects where an ASS author duplicates the text onto multiple layers. + +@end table + +@subsection Examples + +@itemize +@item +Remove styles and animations from ASS subtitles and output events from ass layer 0 only. Then convert asn save as SRT stream: +@example +ffmpeg -i "https://streams.videolan.org/samples/sub/SSA/subtitle_testing_complex.mkv" -filter_complex "[0:1]stripstyles=select_layer=0" -map 0 -c:s srt output.mkv +@end example +@end itemize + @section textmod diff --git a/libavfilter/Makefile b/libavfilter/Makefile index d2995fbec6..7d7da0c59a 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -557,6 +557,7 @@ OBJS-$(CONFIG_NULLSINK_FILTER) += vsink_nullsink.o OBJS-$(CONFIG_CENSOR_FILTER) += sf_textmod.o OBJS-$(CONFIG_SHOW_SPEAKER_FILTER) += sf_textmod.o OBJS-$(CONFIG_TEXTMOD_FILTER) += sf_textmod.o +OBJS-$(CONFIG_STRIPSTYLES_FILTER) += sf_stripstyles.o # multimedia filters OBJS-$(CONFIG_ABITSCOPE_FILTER) += avf_abitscope.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 673f9fb839..27680a2f00 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -546,6 +546,7 @@ extern const AVFilter ff_avf_showwavespic; extern const AVFilter ff_vaf_spectrumsynth; extern const AVFilter ff_sf_censor; extern const AVFilter ff_sf_showspeaker; +extern const AVFilter ff_sf_stripstyles; extern const AVFilter ff_sf_textmod; extern const AVFilter ff_svf_graphicsub2video; extern const AVFilter ff_svf_textsub2video; diff --git a/libavfilter/sf_stripstyles.c b/libavfilter/sf_stripstyles.c new file mode 100644 index 0000000000..82cb9c7647 --- /dev/null +++ b/libavfilter/sf_stripstyles.c @@ -0,0 +1,196 @@ +/* + * Copyright (c) 2021 softworkz + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * text subtitle filter which removes inline-styles from subtitles + */ + +#include "libavutil/opt.h" +#include "internal.h" +#include "libavutil/ass_split_internal.h" +#include "libavutil/bprint.h" + +typedef struct StripStylesContext { + const AVClass *class; + enum AVSubtitleType format; + int remove_animated; + int select_layer; +} StripStylesContext; + +typedef struct DialogContext { + StripStylesContext* ss_ctx; + AVBPrint buffer; + int drawing_scale; + int is_animated; +} DialogContext; + +static void dialog_text_cb(void *priv, const char *text, int len) +{ + DialogContext *s = priv; + + av_log(s->ss_ctx, AV_LOG_DEBUG, "dialog_text_cb: %s\n", text); + + if (!s->drawing_scale && (!s->is_animated || !s->ss_ctx->remove_animated)) + av_bprint_append_data(&s->buffer, text, len); +} + +static void dialog_new_line_cb(void *priv, int forced) +{ + DialogContext *s = priv; + if (!s->drawing_scale && !s->is_animated) + av_bprint_append_data(&s->buffer, forced ? "\\N" : "\\n", 2); +} + +static void dialog_drawing_mode_cb(void *priv, int scale) +{ + DialogContext *s = priv; + s->drawing_scale = scale; +} + +static void dialog_animate_cb(void *priv, int t1, int t2, int accel, char *style) +{ + DialogContext *s = priv; + s->is_animated = 1; +} + +static void dialog_move_cb(void *priv, int x1, int y1, int x2, int y2, int t1, int t2) +{ + DialogContext *s = priv; + if (t1 >= 0 || t2 >= 0) + s->is_animated = 1; +} + +static const ASSCodesCallbacks dialog_callbacks = { + .text = dialog_text_cb, + .new_line = dialog_new_line_cb, + .drawing_mode = dialog_drawing_mode_cb, + .animate = dialog_animate_cb, + .move = dialog_move_cb, +}; + +static char *ass_get_line(int readorder, int layer, const char *style, + const char *speaker, const char *effect, const char *text) +{ + return av_asprintf("%d,%d,%s,%s,0,0,0,%s,%s", + readorder, layer, style ? style : "Default", + speaker ? speaker : "", effect, text); +} + +static char *process_dialog(StripStylesContext *s, const char *ass_line) +{ + DialogContext dlg_ctx = { .ss_ctx = s }; + ASSDialog *dialog = avpriv_ass_split_dialog(NULL, ass_line); + char *result = NULL; + + if (!dialog) + return NULL; + + if (s->select_layer >= 0 && dialog->layer != s->select_layer) + return NULL; + + dlg_ctx.ss_ctx = s; + + av_bprint_init(&dlg_ctx.buffer, 0, AV_BPRINT_SIZE_UNLIMITED); + + avpriv_ass_split_override_codes(&dialog_callbacks, &dlg_ctx, dialog->text); + + if (av_bprint_is_complete(&dlg_ctx.buffer) + && dlg_ctx.buffer.len > 0) + result = ass_get_line(dialog->readorder, dialog->layer, dialog->style, dialog->name, dialog->effect, dlg_ctx.buffer.str); + + av_bprint_finalize(&dlg_ctx.buffer, NULL); + avpriv_ass_free_dialog(&dialog); + + return result; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *frame) +{ + StripStylesContext *s = inlink->dst->priv; + AVFilterLink *outlink = inlink->dst->outputs[0]; + int ret; + + outlink->format = inlink->format; + + ret = av_frame_make_writable(frame); + if (ret <0 ) { + av_frame_free(&frame); + return AVERROR(ENOMEM); + } + + for (unsigned i = 0; i < frame->num_subtitle_areas; i++) { + + AVSubtitleArea *area = frame->subtitle_areas[i]; + + if (area->ass) { + char *tmp = area->ass; + area->ass = process_dialog(s, area->ass); + + if (area->ass) { + av_log(inlink->dst, AV_LOG_INFO, "original: %d %s\n", i, tmp); + av_log(inlink->dst, AV_LOG_INFO, "stripped: %d %s\n", i, area->ass); + } + else + area->ass = NULL; + + av_free(tmp); + } + } + + return ff_filter_frame(outlink, frame); +} + +#define OFFSET(x) offsetof(StripStylesContext, x) +#define FLAGS (AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_FILTERING_PARAM) + +static const AVOption stripstyles_options[] = { + { "remove_animated", "remove animated text (default: yes)", OFFSET(remove_animated), AV_OPT_TYPE_BOOL, {.i64 = 1 }, 0, 1, FLAGS, 0 }, + { "select_layer", "process a specific ass layer only", OFFSET(remove_animated), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, INT_MAX, FLAGS, 0 }, + { NULL }, +}; + +AVFILTER_DEFINE_CLASS(stripstyles); + +static const AVFilterPad inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_SUBTITLE, + .filter_frame = filter_frame, + }, +}; + +static const AVFilterPad outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_SUBTITLE, + }, +}; + +const AVFilter ff_sf_stripstyles = { + .name = "stripstyles", + .description = NULL_IF_CONFIG_SMALL("Strip subtitle inline styles"), + .priv_size = sizeof(StripStylesContext), + .priv_class = &stripstyles_class, + FILTER_INPUTS(inputs), + FILTER_OUTPUTS(outputs), + FILTER_SINGLE_SUBFMT(AV_SUBTITLE_FMT_ASS), +}; +