| Message ID | 20191008152839.30375-1-lance.lmwang@gmail.com |
|---|---|
| State | New |
| Headers | show |
ping, I have other developing filter is using this metadata, please feedback whether it's OK to merge. On Tue, Oct 08, 2019 at 11:28:36PM +0800, lance.lmwang@gmail.com wrote: > From: Limin Wang <lance.lmwang@gmail.com> > > Reviewed-by: Paul B Mahol <onemda@gmail.com> > Signed-off-by: Limin Wang <lance.lmwang@gmail.com> > --- > configure | 1 + > doc/filters.texi | 35 ++++++++ > libavfilter/Makefile | 1 + > libavfilter/allfilters.c | 1 + > libavfilter/vf_scdet.c | 224 +++++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 262 insertions(+) > create mode 100644 libavfilter/vf_scdet.c > > diff --git a/configure b/configure > index 8413826..e67cfc1 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" > +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 0e72cce..4b3eeb1 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 16bb8cd..13fa000 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-$(CONFIG_SCDET_FILTER) += vf_scdet.o > OBJS-$(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 4f8b303..38a7bfb 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_scdet; > extern AVFilter ff_vf_scroll; > extern AVFilter ff_vf_select; > extern AVFilter ff_vf_selectivecolor; > diff --git a/libavfilter/vf_scdet.c b/libavfilter/vf_scdet.c > new file mode 100644 > index 0000000..b91d91f > --- /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, > +}; > -- > 2.6.4 >
will rebase and apply it tomorrow if no more comments as it's reviewed long time. I need it for other filter to use. On Tue, Oct 08, 2019 at 11:28:36PM +0800, lance.lmwang@gmail.com wrote: > From: Limin Wang <lance.lmwang@gmail.com> > > Reviewed-by: Paul B Mahol <onemda@gmail.com> > Signed-off-by: Limin Wang <lance.lmwang@gmail.com> > --- > configure | 1 + > doc/filters.texi | 35 ++++++++ > libavfilter/Makefile | 1 + > libavfilter/allfilters.c | 1 + > libavfilter/vf_scdet.c | 224 +++++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 262 insertions(+) > create mode 100644 libavfilter/vf_scdet.c > > diff --git a/configure b/configure > index 8413826..e67cfc1 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" > +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 0e72cce..4b3eeb1 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 16bb8cd..13fa000 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-$(CONFIG_SCDET_FILTER) += vf_scdet.o > OBJS-$(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 4f8b303..38a7bfb 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_scdet; > extern AVFilter ff_vf_scroll; > extern AVFilter ff_vf_select; > extern AVFilter ff_vf_selectivecolor; > diff --git a/libavfilter/vf_scdet.c b/libavfilter/vf_scdet.c > new file mode 100644 > index 0000000..b91d91f > --- /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, > +}; > -- > 2.6.4 >
On 14-05-2020 06:55 am, lance.lmwang@gmail.com wrote: > > will rebase and apply it tomorrow if no more comments as it's reviewed long time. I need it > for other filter to use. What would be helpful is to add options to detect scene change only within a specified window. Imagine surveillance footage where only part of the frame is of interest. Gyan
On Thu, May 14, 2020 at 10:33:00AM +0530, Gyan Doshi wrote: > > > On 14-05-2020 06:55 am, lance.lmwang@gmail.com wrote: > > > > will rebase and apply it tomorrow if no more comments as it's reviewed long time. I need it > > for other filter to use. > What would be helpful is to add options to detect scene change only within a > specified window. Imagine surveillance footage where only part of the frame > is of interest. It sounds good, I'll consider to support it in the next version. > > Gyan > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
diff --git a/configure b/configure index 8413826..e67cfc1 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" +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 0e72cce..4b3eeb1 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 16bb8cd..13fa000 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-$(CONFIG_SCDET_FILTER) += vf_scdet.o OBJS-$(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 4f8b303..38a7bfb 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_scdet; extern AVFilter ff_vf_scroll; extern AVFilter ff_vf_select; extern AVFilter ff_vf_selectivecolor; diff --git a/libavfilter/vf_scdet.c b/libavfilter/vf_scdet.c new file mode 100644 index 0000000..b91d91f --- /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, +};