From patchwork Tue Oct 8 09:08:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lance Wang X-Patchwork-Id: 15558 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 B22F844A919 for ; Tue, 8 Oct 2019 12:08:18 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 89111687FF5; Tue, 8 Oct 2019 12:08:18 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-pg1-f193.google.com (mail-pg1-f193.google.com [209.85.215.193]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 9C338687F39 for ; Tue, 8 Oct 2019 12:08:11 +0300 (EEST) Received: by mail-pg1-f193.google.com with SMTP id i32so2607185pgl.10 for ; Tue, 08 Oct 2019 02:08:11 -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:in-reply-to:references; bh=eMLQPalxke1PTCp32h0mjZuSJd/PSdfD12lVEy+kHps=; b=nFtZeS+LYk803bwDSFqOG0ncJ55uGp+5veCLjoD8CmAf7qtf0dozrAbvk/JpyjznIg 17FHDEPTxevBuMOjSQnCQErqXF3thY0ryMHhV2DEzDlkoIWHArdAVgcFvMNVKIIaaK/i T8Q+8Jc6BP1PZy0BpuTEbbrjUYDUpJOc7HZwdEAusR/6h0bGWgISLOwiClckTodl4wiu PGtd8c09WmQ060oxfqLB1jq/+NwOURu9k7yZNexj2cXZ9UT8cmZ+2GBFoYVFpZkzABVh 1nCn+SMQAjW7lJo/6RGlQTm4dsd9Q8hgeZpECIYy5Wu9TrrTP0k/Udh5uTYvvzrKxyIe VLQw== 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:in-reply-to :references; bh=eMLQPalxke1PTCp32h0mjZuSJd/PSdfD12lVEy+kHps=; b=pEqg2Zd0sSBn/egnUyLRpi9cqr0q9mUXCeJmFU5doK7uSGygL4HZxXqNkX4ihVjeF4 f/IInHYCvnwfAUbJx6kxURsYcAQWL6/k0I+Wmd4i/jULATVK9cAalMEqCc12WtlOqRvp CJyE709nKxtErVPu0aqCQrV0j+Xk/1bCk8NPa3t9t+ngYaG5BNzDE9DoUdQEdKFzmZuX uEHAKt50UI3V2WkGtFKYq2crGhkSnJFQb4pposaVEq0ewDtNn1yM1rNBmblxPf+LxuQa lOtwxZBtGwI15JnfJuhorD5++W0lKNyB2etTw2TfR+sk6vPzdI5G82vrmckFX6e8xlKw oBZQ== X-Gm-Message-State: APjAAAVBi3uIJACoOR52E7vvpjfKtq+Rk4z1uWgLRMrbh/7Hew8Icq33 tWdwV4guKugXNoxRTQLVBVKaCSR9 X-Google-Smtp-Source: APXvYqz0ESs2UD3Fz9OnnwHAA1p4UkkZyo1QU9vbJqFuqCtcCuYevT2VrjZMYMyFFne5tymmxY0l2w== X-Received: by 2002:a63:5344:: with SMTP id t4mr15611702pgl.394.1570525689314; Tue, 08 Oct 2019 02:08:09 -0700 (PDT) Received: from vpn.localdomain ([47.90.99.151]) by smtp.gmail.com with ESMTPSA id l24sm17045699pff.151.2019.10.08.02.08.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 08 Oct 2019 02:08:08 -0700 (PDT) From: lance.lmwang@gmail.com To: ffmpeg-devel@ffmpeg.org Date: Tue, 8 Oct 2019 17:08:00 +0800 Message-Id: <20191008090803.20295-1-lance.lmwang@gmail.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20190929132515.4093-1-lance.lmwang@gmail.com> References: <20190929132515.4093-1-lance.lmwang@gmail.com> Subject: [FFmpeg-devel] [PATCH v3 1/4] avfilter/vf_scenechangedetect: add filter to detect scene change 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: Limin Wang MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" From: Limin Wang Signed-off-by: Limin Wang --- configure | 1 + doc/filters.texi | 35 +++++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/vf_scenechangedetect.c | 220 +++++++++++++++++++++++++++++ 5 files changed, 258 insertions(+) create mode 100644 libavfilter/vf_scenechangedetect.c diff --git a/configure b/configure index 8413826f9e..909a77b9cf 100755 --- a/configure +++ b/configure @@ -3520,6 +3520,7 @@ sab_filter_deps="gpl swscale" scale2ref_filter_deps="swscale" scale_filter_deps="swscale" scale_qsv_filter_deps="libmfx" +scenechangedetect_filter_select="scene_sad" select_filter_select="scene_sad" sharpness_vaapi_filter_deps="vaapi" showcqt_filter_deps="avcodec avformat swscale" diff --git a/doc/filters.texi b/doc/filters.texi index 0e72cce829..4b3eeb1c15 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -15780,6 +15780,41 @@ Set the initial horizontal scrolling position. Default is 0. Allowed range is fr Set the initial vertical scrolling position. Default is 0. Allowed range is from 0 to 1. @end table +@anchor{scdet} +@section scdet + +Detect video scene change. + +This filter sets frame metadata with mafd between frame, the scene score, and +forward the frame to the next filter, so they can use these metadata to detect +scene change or others. + +In addition, this filter logs a message and sets frame metadata when it detects +a scene change by @option{threshold}. + +@code{lavfi.scd.mafd} metadata keys are set with mafd for every frame. + +@code{lavfi.scd.score} metadata keys are set with scene change score for every frame +to detect scene change. + +@code{lavfi.scd.time} metadata keys are set with current filtered frame time which +detect scene change with @option{threshold}. + +The filter accepts the following options: + +@table @option +@item threshold, t +Set the scene change detection threshold as a percentage of maximum change. Good +values are in the @code{[8.0, 14.0]} range. The range for @option{threshold} is +@code{[0., 100.]}. + +Default value is @code{10.}. + +@item sc_pass, s +Set the flag to pass scene change frames to the next filter. Default value is @code{0} +You can enable it if you want to get snapshot of scene change frames only. +@end table + @anchor{selectivecolor} @section selectivecolor diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 16bb8cd965..75ed533bdb 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -358,6 +358,7 @@ OBJS-$(CONFIG_SCALE_NPP_FILTER) += vf_scale_npp.o scale.o OBJS-$(CONFIG_SCALE_QSV_FILTER) += vf_scale_qsv.o OBJS-$(CONFIG_SCALE_VAAPI_FILTER) += vf_scale_vaapi.o scale.o vaapi_vpp.o OBJS-$(CONFIG_SCALE2REF_FILTER) += vf_scale.o scale.o +OBJS-$(CONFIG_SCENECHANGEDETECT_FILTER) += vf_scenechangedetect.o OBJS-$(CONFIG_SCROLL_FILTER) += vf_scroll.o OBJS-$(CONFIG_SELECT_FILTER) += f_select.o OBJS-$(CONFIG_SELECTIVECOLOR_FILTER) += vf_selectivecolor.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 4f8b3039ed..5379fccdfc 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -340,6 +340,7 @@ extern AVFilter ff_vf_scale_npp; extern AVFilter ff_vf_scale_qsv; extern AVFilter ff_vf_scale_vaapi; extern AVFilter ff_vf_scale2ref; +extern AVFilter ff_vf_scenechangedetect; extern AVFilter ff_vf_scroll; extern AVFilter ff_vf_select; extern AVFilter ff_vf_selectivecolor; diff --git a/libavfilter/vf_scenechangedetect.c b/libavfilter/vf_scenechangedetect.c new file mode 100644 index 0000000000..a745ee15b3 --- /dev/null +++ b/libavfilter/vf_scenechangedetect.c @@ -0,0 +1,220 @@ +/* + * 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 + * video scene change detection filter + */ + +#include "libavutil/avassert.h" +#include "libavutil/imgutils.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "libavutil/timestamp.h" + +#include "avfilter.h" +#include "filters.h" +#include "scene_sad.h" + +typedef struct SceneChangeDetectContext { + const AVClass *class; + + ptrdiff_t width[4]; + ptrdiff_t height[4]; + int nb_planes; + int bitdepth; + ff_scene_sad_fn sad; + double prev_mafd; + double scene_score; + AVFrame *prev_picref; + double threshold; + int sc_pass; +} SceneChangeDetectContext; + +#define OFFSET(x) offsetof(SceneChangeDetectContext, x) +#define V AV_OPT_FLAG_VIDEO_PARAM +#define F AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption scenechangedetect_options[] = { + { "threshold", "set scene change detect threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl = 10.}, 0, 100., V|F }, + { "t", "set scene change detect threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl = 10.}, 0, 100., V|F }, + { "sc_pass", "Set the flag to pass scene change frames", OFFSET(sc_pass), AV_OPT_TYPE_BOOL, {.dbl = 0 }, 0, 1, V|F }, + { "s", "Set the flag to pass scene change frames", OFFSET(sc_pass), AV_OPT_TYPE_BOOL, {.dbl = 0 }, 0, 1, V|F }, + {NULL} +}; + +AVFILTER_DEFINE_CLASS(scenechangedetect); + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat pix_fmts[] = { + AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, AV_PIX_FMT_RGBA, + AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8, + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P, + AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P, + AV_PIX_FMT_YUV420P10, + AV_PIX_FMT_NONE + }; + + AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); + if (!fmts_list) + return AVERROR(ENOMEM); + return ff_set_common_formats(ctx, fmts_list); +} + +static int config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + SceneChangeDetectContext *s = ctx->priv; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + int is_yuv = !(desc->flags & AV_PIX_FMT_FLAG_RGB) && + (desc->flags & AV_PIX_FMT_FLAG_PLANAR) && + desc->nb_components >= 3; + + s->bitdepth = desc->comp[0].depth; + s->nb_planes = is_yuv ? 1 : av_pix_fmt_count_planes(inlink->format); + + for (int plane = 0; plane < 4; plane++) { + ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w, plane); + s->width[plane] = line_size >> (s->bitdepth > 8); + s->height[plane] = inlink->h >> ((plane == 1 || plane == 2) ? desc->log2_chroma_h : 0); + } + + s->sad = ff_scene_sad_get_fn(s->bitdepth == 8 ? 8 : 16); + if (!s->sad) + return AVERROR(EINVAL); + + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + SceneChangeDetectContext *s = ctx->priv; + + av_frame_free(&s->prev_picref); +} + +static double get_scene_score(AVFilterContext *ctx, AVFrame *frame) +{ + double ret = 0; + SceneChangeDetectContext *s = ctx->priv; + AVFrame *prev_picref = s->prev_picref; + + if (prev_picref && frame->height == prev_picref->height + && frame->width == prev_picref->width) { + uint64_t sad = 0; + double mafd, diff; + uint64_t count = 0; + + for (int plane = 0; plane < s->nb_planes; plane++) { + uint64_t plane_sad; + s->sad(prev_picref->data[plane], prev_picref->linesize[plane], + frame->data[plane], frame->linesize[plane], + s->width[plane], s->height[plane], &plane_sad); + sad += plane_sad; + count += s->width[plane] * s->height[plane]; + } + + emms_c(); + mafd = (double)sad * 100. / count / (1ULL << s->bitdepth); + diff = fabs(mafd - s->prev_mafd); + ret = av_clipf(FFMIN(mafd, diff), 0, 100.); + s->prev_mafd = mafd; + av_frame_free(&prev_picref); + } + s->prev_picref = av_frame_clone(frame); + return ret; +} + +static int set_meta(SceneChangeDetectContext *s, AVFrame *frame, const char *key, const char *value) +{ + return av_dict_set(&frame->metadata, key, value, 0); +} + +static int activate(AVFilterContext *ctx) +{ + int ret; + AVFilterLink *inlink = ctx->inputs[0]; + AVFilterLink *outlink = ctx->outputs[0]; + SceneChangeDetectContext *s = ctx->priv; + AVFrame *frame; + + FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); + + ret = ff_inlink_consume_frame(inlink, &frame); + if (ret < 0) + return ret; + + if (frame) { + char buf[64]; + s->scene_score = get_scene_score(ctx, frame); + snprintf(buf, sizeof(buf), "%0.3f", s->prev_mafd); + set_meta(s, frame, "lavfi.scd.mafd", buf); + snprintf(buf, sizeof(buf), "%0.3f", s->scene_score); + set_meta(s, frame, "lavfi.scd.score", buf); + + if (s->scene_score > s->threshold) { + av_log(s, AV_LOG_INFO, "lavfi.scd.score: %.3f, lavfi.scd.time: %s\n", + s->scene_score, av_ts2timestr(frame->pts, &inlink->time_base)); + set_meta(s, frame, "lavfi.scd.time", + av_ts2timestr(frame->pts, &inlink->time_base)); + } + if (s->sc_pass) { + if (s->scene_score > s->threshold) + return ff_filter_frame(outlink, frame); + else { + av_frame_free(&frame); + } + } else + return ff_filter_frame(outlink, frame); + } + + FF_FILTER_FORWARD_STATUS(inlink, outlink); + FF_FILTER_FORWARD_WANTED(outlink, inlink); + + return FFERROR_NOT_READY; +} + +static const AVFilterPad scenechangedetect_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad scenechangedetect_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_scenechangedetect = { + .name = "scdet", + .description = NULL_IF_CONFIG_SMALL("Detect video scene change"), + .priv_size = sizeof(SceneChangeDetectContext), + .priv_class = &scenechangedetect_class, + .uninit = uninit, + .query_formats = query_formats, + .inputs = scenechangedetect_inputs, + .outputs = scenechangedetect_outputs, + .activate = activate, +};