Signed-off-by: Paul B Mahol <one...@gmail.com> --- libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/vf_setfps.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 121 insertions(+) create mode 100644 libavfilter/vf_setfps.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 9125443..b1a0f9d 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -208,6 +208,7 @@ OBJS-$(CONFIG_SELECT_FILTER) += f_select.o OBJS-$(CONFIG_SENDCMD_FILTER) += f_sendcmd.o OBJS-$(CONFIG_SETDAR_FILTER) += vf_aspect.o OBJS-$(CONFIG_SETFIELD_FILTER) += vf_setfield.o +OBJS-$(CONFIG_SETFPS_FILTER) += vf_setfps.o OBJS-$(CONFIG_SETPTS_FILTER) += setpts.o OBJS-$(CONFIG_SETSAR_FILTER) += vf_aspect.o OBJS-$(CONFIG_SETTB_FILTER) += settb.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 612fc99..17748db 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -229,6 +229,7 @@ void avfilter_register_all(void) REGISTER_FILTER(SEPARATEFIELDS, separatefields, vf); REGISTER_FILTER(SETDAR, setdar, vf); REGISTER_FILTER(SETFIELD, setfield, vf); + REGISTER_FILTER(SETFPS, setfps, vf); REGISTER_FILTER(SETPTS, setpts, vf); REGISTER_FILTER(SETSAR, setsar, vf); REGISTER_FILTER(SETTB, settb, vf); diff --git a/libavfilter/vf_setfps.c b/libavfilter/vf_setfps.c new file mode 100644 index 0000000..4360998 --- /dev/null +++ b/libavfilter/vf_setfps.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2015 The FFmpeg Project + * + * 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 + * a filter changing framerate and updating pts + */ + +#include <float.h> +#include <stdint.h> + +#include "libavutil/common.h" +#include "libavutil/fifo.h" +#include "libavutil/mathematics.h" +#include "libavutil/opt.h" +#include "libavutil/parseutils.h" + +#include "avfilter.h" +#include "internal.h" +#include "video.h" + +typedef struct SetFPSContext { + const AVClass *class; + + AVRational framerate; + int64_t first_pts; +} SetFPSContext; + +#define OFFSET(x) offsetof(SetFPSContext, x) +#define V AV_OPT_FLAG_VIDEO_PARAM +#define F AV_OPT_FLAG_FILTERING_PARAM +static const AVOption setfps_options[] = { + { "fps", "A string describing desired output framerate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, { .str = "25" }, .flags = V|F }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(setfps); + +static int config_props(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + SetFPSContext *s = ctx->priv; + AVFilterLink *inlink = ctx->inputs[0]; + + outlink->time_base = av_inv_q(s->framerate); + outlink->frame_rate = s->framerate; + s->first_pts = AV_NOPTS_VALUE; + + av_log(outlink->src, AV_LOG_VERBOSE, "fps:%d/%d -> fps:%d/%d\n", + inlink ->frame_rate.num, inlink ->frame_rate.den, + outlink->frame_rate.num, outlink->frame_rate.den); + + return 0; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *frame) +{ + AVFilterContext *ctx = inlink->dst; + SetFPSContext *s = ctx->priv; + AVFilterLink *outlink = ctx->outputs[0]; + + if (av_cmp_q(inlink->time_base, outlink->time_base) && ((s->first_pts != AV_NOPTS_VALUE) || (frame->pts != AV_NOPTS_VALUE))) { + int64_t orig_pts = frame->pts; + + if (s->first_pts == AV_NOPTS_VALUE) + s->first_pts = frame->pts; + + frame->pts = av_rescale_q(s->first_pts, inlink->time_base, outlink->time_base) + outlink->frame_count; + av_log(ctx, AV_LOG_DEBUG, "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n", + inlink ->time_base.num, inlink ->time_base.den, orig_pts, + outlink->time_base.num, outlink->time_base.den, frame->pts); + } + + return ff_filter_frame(outlink, frame); +} + +static const AVFilterPad setfps_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad setfps_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_props + }, + { NULL } +}; + +AVFilter ff_vf_setfps = { + .name = "setfps", + .description = NULL_IF_CONFIG_SMALL("Set framerate for video output link."), + .priv_size = sizeof(SetFPSContext), + .priv_class = &setfps_class, + .inputs = setfps_inputs, + .outputs = setfps_outputs, +}; -- 1.9.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel