diff options
| -rw-r--r-- | Changelog | 1 | ||||
| -rwxr-xr-x | configure | 1 | ||||
| -rw-r--r-- | doc/filters.texi | 35 | ||||
| -rw-r--r-- | libavfilter/Makefile | 1 | ||||
| -rw-r--r-- | libavfilter/allfilters.c | 1 | ||||
| -rw-r--r-- | libavfilter/version.h | 2 | ||||
| -rw-r--r-- | libavfilter/vf_scdet.c | 224 |
7 files changed, 264 insertions, 1 deletions
@@ -66,6 +66,7 @@ version <next>: - asubboost filter - Pro Pinball Series Soundbank demuxer - pcm_rechunk bitstream filter +- scdet filter version 4.2: @@ -3569,6 +3569,7 @@ sab_filter_deps="gpl swscale" scale2ref_filter_deps="swscale" scale_filter_deps="swscale" scale_qsv_filter_deps="libmfx" +scdet_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 d19fd346ae..a3e78b1d20 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -16578,6 +16578,41 @@ Set the horizontal scrolling speed. Set the vertical scrolling speed. @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 f982afe15f..b2086f6fa9 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -376,6 +376,7 @@ OBJS-$(CONFIG_SCALE_QSV_FILTER) += vf_scale_qsv.o OBJS-$(CONFIG_SCALE_VAAPI_FILTER) += vf_scale_vaapi.o scale_eval.o vaapi_vpp.o OBJS-$(CONFIG_SCALE_VULKAN_FILTER) += vf_scale_vulkan.o vulkan.o OBJS-$(CONFIG_SCALE2REF_FILTER) += vf_scale.o scale_eval.o +OBJS-$(CONFIG_SCDET_FILTER) += vf_scdet.o OBJS-$(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 1b94501da0..8830c8d871 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -358,6 +358,7 @@ extern AVFilter ff_vf_scale_qsv; extern AVFilter ff_vf_scale_vaapi; extern AVFilter ff_vf_scale_vulkan; extern AVFilter ff_vf_scale2ref; +extern AVFilter ff_vf_scdet; extern AVFilter ff_vf_scroll; extern AVFilter ff_vf_select; extern AVFilter ff_vf_selectivecolor; diff --git a/libavfilter/version.h b/libavfilter/version.h index c0d496684e..8bb22c380f 100644 --- a/libavfilter/version.h +++ b/libavfilter/version.h @@ -30,7 +30,7 @@ #include "libavutil/version.h" #define LIBAVFILTER_VERSION_MAJOR 7 -#define LIBAVFILTER_VERSION_MINOR 80 +#define LIBAVFILTER_VERSION_MINOR 81 #define LIBAVFILTER_VERSION_MICRO 100 diff --git a/libavfilter/vf_scdet.c b/libavfilter/vf_scdet.c new file mode 100644 index 0000000000..b91d91f1e1 --- /dev/null +++ b/libavfilter/vf_scdet.c @@ -0,0 +1,224 @@ +/* + * 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 SCDetContext { + 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; +} SCDetContext; + +#define OFFSET(x) offsetof(SCDetContext, x) +#define V AV_OPT_FLAG_VIDEO_PARAM +#define F AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption scdet_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(scdet); + +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_YUV440P, AV_PIX_FMT_YUVJ440P, + AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, + AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12, + AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12, + AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12, + 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; + SCDetContext *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) +{ + SCDetContext *s = ctx->priv; + + av_frame_free(&s->prev_picref); +} + +static double get_scene_score(AVFilterContext *ctx, AVFrame *frame) +{ + double ret = 0; + SCDetContext *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(SCDetContext *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]; + SCDetContext *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 scdet_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad scdet_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_scdet = { + .name = "scdet", + .description = NULL_IF_CONFIG_SMALL("Detect video scene change"), + .priv_size = sizeof(SCDetContext), + .priv_class = &scdet_class, + .uninit = uninit, + .query_formats = query_formats, + .inputs = scdet_inputs, + .outputs = scdet_outputs, + .activate = activate, +}; |