Re: [FFmpeg-devel] [PATCH v3 1/3] lavf/f_select: support scenecut with more pixel formats
On Tue, 23 Jul 2019, Gyan wrote: On 23-07-2019 02:43 AM, Marton Balint wrote: On Sun, 21 Jul 2019, lance.lmw...@gmail.com wrote: From: Limin Wang This patch haven't make other pixel format usable yet to make sure the test result is same with rgb32 format. Reviewed-by: Marton Balint You should only add this if you got an explicit LGTM for a patch. Signed-off-by: Limin Wang --- libavfilter/f_select.c | 34 ++ 1 file changed, 30 insertions(+), 4 deletions(-) Ok, I applied the series with some minor fixes and rewordings of your commit messages, as they were a bit difficult to understand sometimes. "avformat/f_select: support scenecut with more pixel formats" This should have been avfilter/f_select. Yes, sorry about that. There is one more thing that we might consider. Now the scene change detection score uses all planes to detect scene changes. In this regard this is similar how the frozen frames detection works. However, in classic encoding scene change detection typically only uses the Y plane as far as I know, not the chroma planes. We might get more resonable scores for scene change if we also use only the Y plane for calculating the score if the pixel format is YUV. Although this will require additional work once packed YUV formats are added, because for the moment the generic scene sad score calculation has no way to ignore some components in a packed format. Also it does not make a whole lot of difference, because chroma is usually subsampled anyway, so it is weighting less in the scene score. So I guess there are pros and cons for this. Regards, Marton ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-devel] [PATCH v3 1/3] lavf/f_select: support scenecut with more pixel formats
On 23-07-2019 02:43 AM, Marton Balint wrote: On Sun, 21 Jul 2019, lance.lmw...@gmail.com wrote: From: Limin Wang This patch haven't make other pixel format usable yet to make sure the test result is same with rgb32 format. Reviewed-by: Marton Balint You should only add this if you got an explicit LGTM for a patch. Signed-off-by: Limin Wang --- libavfilter/f_select.c | 34 ++ 1 file changed, 30 insertions(+), 4 deletions(-) Ok, I applied the series with some minor fixes and rewordings of your commit messages, as they were a bit difficult to understand sometimes. "avformat/f_select: support scenecut with more pixel formats" This should have been avfilter/f_select. 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-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-devel] [PATCH v3 1/3] lavf/f_select: support scenecut with more pixel formats
On Mon, Jul 22, 2019 at 11:13:46PM +0200, Marton Balint wrote: > > On Sun, 21 Jul 2019, lance.lmw...@gmail.com wrote: > > >From: Limin Wang > > > >This patch haven't make other pixel format usable yet to make sure the test > >result is same with rgb32 format. > > > >Reviewed-by: Marton Balint > > You should only add this if you got an explicit LGTM for a patch. OK, got it. thanks for the review, it's very helpful. > > >Signed-off-by: Limin Wang > >--- > >libavfilter/f_select.c | 34 ++ > >1 file changed, 30 insertions(+), 4 deletions(-) > > Ok, I applied the series with some minor fixes and rewordings of > your commit messages, as they were a bit difficult to understand > sometimes. OK, after the change, it looks better. > > Thanks, > Marton > ___ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-devel] [PATCH v3 1/3] lavf/f_select: support scenecut with more pixel formats
On Sun, 21 Jul 2019, lance.lmw...@gmail.com wrote: From: Limin Wang This patch haven't make other pixel format usable yet to make sure the test result is same with rgb32 format. Reviewed-by: Marton Balint You should only add this if you got an explicit LGTM for a patch. Signed-off-by: Limin Wang --- libavfilter/f_select.c | 34 ++ 1 file changed, 30 insertions(+), 4 deletions(-) Ok, I applied the series with some minor fixes and rewordings of your commit messages, as they were a bit difficult to understand sometimes. Thanks, Marton ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-devel] [PATCH v3 1/3] lavf/f_select: support scenecut with more pixel formats
From: Limin Wang
This patch haven't make other pixel format usable yet to make sure the test
result is same with rgb32 format.
Reviewed-by: Marton Balint
Signed-off-by: Limin Wang
---
libavfilter/f_select.c | 34 ++
1 file changed, 30 insertions(+), 4 deletions(-)
diff --git a/libavfilter/f_select.c b/libavfilter/f_select.c
index 1132375..b872cee 100644
--- a/libavfilter/f_select.c
+++ b/libavfilter/f_select.c
@@ -28,6 +28,8 @@
#include "libavutil/fifo.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "audio.h"
#include "formats.h"
@@ -144,6 +146,10 @@ typedef struct SelectContext {
char *expr_str;
AVExpr *expr;
double var_values[VAR_VARS_NB];
+int bitdepth;
+int nb_planes;
+ptrdiff_t width[4];
+ptrdiff_t height[4];
int do_scene_detect;///< 1 if the expression requires scene
detection variables, 0 otherwise
ff_scene_sad_fn sad;///< Sum of the absolute difference
function (scene detect only)
double prev_mafd; ///< previous MAFD
(scene detect only)
@@ -202,6 +208,17 @@ static av_cold int init(AVFilterContext *ctx)
static int config_input(AVFilterLink *inlink)
{
SelectContext *select = inlink->dst->priv;
+const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+
+select->bitdepth = desc->comp[0].depth;
+select->nb_planes = av_pix_fmt_count_planes(inlink->format);
+for (int plane = 0; plane < select->nb_planes; plane++) {
+ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w,
plane);
+int vsub = desc->log2_chroma_h;
+
+select->width[plane] = line_size >> (select->bitdepth > 8);
+select->height[plane] = plane == 1 || plane == 2 ?
AV_CEIL_RSHIFT(inlink->h, vsub) : inlink->h;
+}
select->var_values[VAR_N] = 0.0;
select->var_values[VAR_SELECTED_N] = 0.0;
@@ -242,7 +259,7 @@ static int config_input(AVFilterLink *inlink)
inlink->type == AVMEDIA_TYPE_AUDIO ? inlink->sample_rate : NAN;
if (CONFIG_SELECT_FILTER && select->do_scene_detect) {
-select->sad = ff_scene_sad_get_fn(8);
+select->sad = ff_scene_sad_get_fn(select->bitdepth == 8 ? 8 : 16);
if (!select->sad)
return AVERROR(EINVAL);
}
@@ -258,12 +275,21 @@ static double get_scene_score(AVFilterContext *ctx,
AVFrame *frame)
if (prev_picref &&
frame->height == prev_picref->height &&
frame->width == prev_picref->width) {
-uint64_t sad;
+uint64_t sad = 0;
double mafd, diff;
+int count = 0;
+
+for (int plane = 0; plane < select->nb_planes; plane++) {
+uint64_t plane_sad;
+select->sad(prev_picref->data[plane], prev_picref->linesize[plane],
+frame->data[plane], frame->linesize[plane],
+select->width[plane], select->height[plane], _sad);
+sad += plane_sad;
+count += select->width[plane] * select->height[plane];
+}
-select->sad(prev_picref->data[0], prev_picref->linesize[0],
frame->data[0], frame->linesize[0], frame->width * 3, frame->height, );
emms_c();
-mafd = (double)sad / (frame->width * 3 * frame->height);
+mafd = (double)sad / count / (1ULL << (select->bitdepth - 8));
diff = fabs(mafd - select->prev_mafd);
ret = av_clipf(FFMIN(mafd, diff) / 100., 0, 1);
select->prev_mafd = mafd;
--
2.6.4
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