ffmpeg录制视频时添加时间水印

IPcamera录制视频，经常用到时间戳水印。ffmpeg avfilter模块，可以实现水印的添加

设置filter

const char *filters_descr = "drawtext=fontfile=DFPGB_Y5.TTF:fontsize=20:fontcolor=white:box=0:boxcolor=black:shadowy=1:alpha=0.8:x=10:y=10:text='2010'";

字段	作用
drawtext	用于添加文字水印
fontfile	字体文件（中文需要支持utf-8）
fontsize	字体大小
fontcolor	字体颜色
box	是否需要添加填充框
boxcolor	填充框颜色
shadowy	阴影偏移
alpha	透明度
x,y	文字坐标
text	文字内容

实现


#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
#include <libavutil/opt.h>typedef struct
{int inited;AVFilterContext *filtersink_ctx;AVFilterContext *filtersrc_ctx;AVFilterGraph *filter_graph;AVFilterInOut *outputs;AVFilterInOut *inputs;AVFilterContext* filter_ctx;    //动态修改文字AVFrame *filt_frame;
} frame_filter_t;const char *filters_descr = "drawtext=fontfile=DFPGB_Y5.TTF:fontsize=20:fontcolor=white:box=0:boxcolor=black:shadowy=1:alpha=0.8:x=10:y=10:text='2010'";// 初始化filter
int filter_init(frame_filter_t *frame_filter,AVRational time_base1,AVCodecContext *dec_ctx,AVCodecContext *enc_ctx)
{char args[512];int ret = 0;int video_stream_index = 0;// AVFormatContext *fmt_ctxAVFilterContext *filtersink_ctx;AVFilterContext *filtersrc_ctx;AVFilterGraph *filter_graph;const AVFilter *buffersrc  = avfilter_get_by_name("buffer");const AVFilter *buffersink = avfilter_get_by_name("buffersink");AVFilterInOut *outputs = avfilter_inout_alloc();AVFilterInOut *inputs  = avfilter_inout_alloc();AVRational time_base = time_base1;//fmt_ctx->streams[video_stream_index]->time_base;enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE };//{ AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };// 输出格式pix_fmts[0] = enc_ctx->pix_fmt;filter_graph = avfilter_graph_alloc();if (!outputs || !inputs || !filter_graph) {ret = AVERROR(ENOMEM);goto end;}/* buffer video source: the decoded frames from the decoder will be inserted here. */snprintf(args, sizeof(args),"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt,time_base.num, time_base.den,dec_ctx->sample_aspect_ratio.num, dec_ctx->sample_aspect_ratio.den);ret = avfilter_graph_create_filter(&filtersrc_ctx, buffersrc, "in",args, NULL, filter_graph);if (ret < 0) {av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n");goto end;}/* buffer video sink: to terminate the filter chain. */ret = avfilter_graph_create_filter(&filtersink_ctx, buffersink, "out",NULL, NULL, filter_graph);if (ret < 0) {av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n");goto end;}ret = av_opt_set_int_list(filtersink_ctx, "pix_fmts", pix_fmts,AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN);if (ret < 0) {av_log(NULL, AV_LOG_ERROR, "Cannot set output pixel format\n");goto end;}/** Set the endpoints for the filter graph. The filter_graph will* be linked to the graph described by filters_descr.*//** The buffer source output must be connected to the input pad of* the first filter described by filters_descr; since the first* filter input label is not specified, it is set to "in" by* default.*/outputs->name       = av_strdup("in");outputs->filter_ctx = filtersrc_ctx;outputs->pad_idx    = 0;outputs->next       = NULL;/** The buffer sink input must be connected to the output pad of* the last filter described by filters_descr; since the last* filter output label is not specified, it is set to "out" by* default.*/inputs->name       = av_strdup("out");inputs->filter_ctx = filtersink_ctx;inputs->pad_idx    = 0;inputs->next       = NULL;if ((ret = avfilter_graph_parse_ptr(filter_graph, filters_descr,&inputs, &outputs, NULL)) < 0){fprintf(stderr, "[%s](%d) ----\n",__func__,__LINE__);goto end;}if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)goto end;// 找到text字段，用来动态修改int Parsed_drawtext_0_index = -1;for (int i = 0; i < filter_graph->nb_filters; i++){AVFilterContext* filter_ctxn = filter_graph->filters[i];fprintf(stdout, "[%s](%d) filter_ctxn->name=%s\n",__func__,__LINE__,filter_ctxn->name);if(!strcmp(filter_ctxn->name,"Parsed_drawtext_0"))Parsed_drawtext_0_index = i;}if(Parsed_drawtext_0_index == -1)fprintf(stderr, "[%s](%d) no Parsed_drawtext_0\n",__func__,__LINE__);frame_filter->filter_ctx = filter_graph->filters[Parsed_drawtext_0_index];frame_filter->filtersink_ctx = filtersink_ctx;frame_filter->filtersrc_ctx = filtersrc_ctx;frame_filter->filter_graph = filter_graph;frame_filter->inputs = inputs;frame_filter->outputs = outputs;frame_filter->filt_frame = av_frame_alloc();frame_filter->inited = 1;fprintf(stdout, "[%s](%d) init done!\n",__func__,__LINE__);return 0;
end:// avfilter_inout_free(&inputs);// avfilter_inout_free(&outputs);return ret;
}// 动态修改水印内容
int set_filter_text(frame_filter_t *frame_filter,char *text)
{int ret=0;AVFilterContext* filter_ctx1 = frame_filter->filter_ctx;fprintf(stdout, "[%s](%d) text:%s\n",__func__,__LINE__,text);ret = av_opt_set(filter_ctx1->priv, "text", text, 0 );if(ret < 0)goto __end;return 0;
__end:return -1;
}
// 对一帧数据添加水印
int do_filter(frame_filter_t *frame_filter,AVFrame *framesrc,AVFrame *framedst)
{int ret=0;AVFilterContext *filtersink_ctx = frame_filter->filtersink_ctx;AVFilterContext *filtersrc_ctx = frame_filter->filtersrc_ctx;AVFrame *filt_frame = frame_filter->filt_frame;/* push the decoded frame into the filtergraph */if (av_buffersrc_add_frame_flags(filtersrc_ctx, framesrc, AV_BUFFERSRC_FLAG_KEEP_REF) < 0) {av_log(NULL, AV_LOG_ERROR, "Error while feeding the filtergraph\n");return -1;}/* pull filtered frames from the filtergraph */while (1) {ret = av_buffersink_get_frame(filtersink_ctx, filt_frame);if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)break;if (ret < 0)goto __end;// TODO:// framedst = av_frame_clone(filt_frame);av_frame_move_ref(framedst,filt_frame);av_frame_unref(filt_frame);}__end:return ret;
}void filter_free(frame_filter_t *frame_filter)
{avfilter_graph_free(&frame_filter->filter_graph);avfilter_inout_free(&frame_filter->inputs);avfilter_inout_free(&frame_filter->outputs);av_frame_free(&frame_filter->filt_frame);// av_frame_free(&frame);// av_frame_free(&filt_frame);
}

动态设置时间水印

 // 设置水印char sys_time[64];time_t ltime;time(&ltime);struct tm* today = localtime(&ltime);// 2020-11-22 日 06:33:15strftime(sys_time, sizeof(sys_time), "%Y-%m-%d 周%a %H:%M:%S", today);       //24小时制set_filter_text(&frame_filter,sys_time);

效果

ffmpeg录制视频时添加时间水印相关推荐

Android录像时添加时间水印
在网上搜索整理了下,有三篇有用的文章,原理也是一样. 实现步骤说明在这里Android 录制视频添加时间水印上面也仅给出了步骤,具体代码在增加录像时间戳水印. camera框架介绍可以找到.从博客 ...
家用监控摄像机录制视频上的时间水印有什么用
家用监控摄像机录制视频上的时间戳是否重要?是的,这一点非常重要.因为监控摄像机所捕捉到的画面片段都是根据时间推移来实现的,当然要查询某一段时间或者某一个时间点发生的特定事件或者活动的时候.这个时间水印 ...
JavaCV/FFmpeg录制视频并添加多重滤镜
JavaCV录制视频时常遇到添加FFmpeg音视频滤镜的需求,FFmpeg内置很多常用的滤镜,如果添加多个滤镜的时候代码处理相对单个要复杂一点,使用滤镜的时候需要注意像素格式的转换,FFmpeg处理的 ...
使用ffmpeg在视频中心添加透明水印
参考:ffmpeg设置水印透明度 - 编程乐园 <FFmpeg Basics>中文版-22- 颜色修正 - 简书 ffmpeg 添加水印_半岛铁盒.的博客-CSDN博客_ffmpeg 水印 ...
php 直接调用ffmpeg 中加水印,如何使用ffmpeg在视频中心添加透明水印？
我目前正在使用以下命令: Top left corner ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; ...
ffmpeg给视频添加时间水印
ffmpeg给视频添加时间水印通过 drawtext 滤镜模块给视频添加时间水印给视频添加时间水印用来做片源调试,非常方便的查找和定位处理的哪一帧视频片源: 1. 添加本地时间水印 ffmpeg ...
【技能教学】如何通过FFMPEG编码推RTSP视频直播流到EasyDarwin开源平台时叠加时间水印？
继之前一篇科普文<如何使用RTSP推流组件EasyPusher将MP4文件推到EasyDarwin开源平台>发布后,有开发者提出疑问:假如需要显示视频直播时间,如何在推送的时候可以自定义在 ...
如何通过FFMPEG编码推RTSP视频直播流到EasyDarwin开源平台时叠加时间水印？
继之前一篇科普文<如何使用RTSP推流组件EasyPusher将MP4文件推到EasyDarwin开源平台>发布后,有开发者提出疑问:假如需要显示视频直播时间,如何在推送的时候可以自定义在 ...
Android使用Opengl录像时添加(动态)水印
最近需要开发一个类似行车记录仪的app,其中需要给录制的视频添加动态水印.我使用的是OpenGL开发的,刚开始实现的是静态水印,后面才实现的动态水印. 先上效果图,左下角的是静态水印,中间偏下的是时间 ...

ffmpeg录制视频时添加时间水印

ffmpeg录制视频时添加时间水印相关推荐

最新文章

热门文章