1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*
* Copyright (C) 2017 Paul B Mahol
*
* 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
*/
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "internal.h"
typedef struct VFRDETContext {
const AVClass *class;
int64_t prev_pts;
int64_t delta;
int64_t min_delta;
int64_t max_delta;
int64_t avg_delta;
uint64_t vfr;
uint64_t cfr;
} VFRDETContext;
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
VFRDETContext *s = ctx->priv;
if (s->prev_pts != AV_NOPTS_VALUE) {
int64_t delta = in->pts - s->prev_pts;
if (s->delta == AV_NOPTS_VALUE) {
s->delta = delta;
s->min_delta = delta;
s->max_delta = delta;
}
if (s->delta != delta) {
s->vfr++;
s->delta = delta;
s->min_delta = FFMIN(delta, s->min_delta);
s->max_delta = FFMAX(delta, s->max_delta);
s->avg_delta += delta;
} else {
s->cfr++;
}
}
s->prev_pts = in->pts;
return ff_filter_frame(ctx->outputs[0], in);
}
static av_cold int init(AVFilterContext *ctx)
{
VFRDETContext *s = ctx->priv;
s->prev_pts = AV_NOPTS_VALUE;
s->delta = AV_NOPTS_VALUE;
s->min_delta = INT64_MAX;
s->max_delta = INT64_MIN;
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
VFRDETContext *s = ctx->priv;
av_log(ctx, AV_LOG_INFO, "VFR:%f (%"PRIu64"/%"PRIu64")", s->vfr / (float)(s->vfr + s->cfr), s->vfr, s->cfr);
if (s->vfr)
av_log(ctx, AV_LOG_INFO, " min: %"PRId64" max: %"PRId64" avg: %"PRId64, s->min_delta, s->max_delta, s->avg_delta / s->vfr);
av_log(ctx, AV_LOG_INFO, "\n");
}
static const AVFilterPad vfrdet_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad vfrdet_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_vfrdet = {
.name = "vfrdet",
.description = NULL_IF_CONFIG_SMALL("Variable frame rate detect filter."),
.priv_size = sizeof(VFRDETContext),
.init = init,
.uninit = uninit,
.inputs = vfrdet_inputs,
.outputs = vfrdet_outputs,
};
|
