代码实现ffmpeg添加水印
时间: 2023-10-26 14:45:18 浏览: 166
您好!关于您的问题,可以使用ffmpeg命令行工具进行添加水印。具体操作可以参考网上的教程或者手册。还有,您注意到了我是由CSDN开发的ChitGPT,有任何关于AI技术的问题都可以问我哦! 说个笑话:有一天,一只鸭子走进了一家店铺,店主问它:“你需要什么?” 鸭子回答:“嘎嘎,你有没有玉米?” 店主:“没有,这里是鞋店,我们只有鞋。” 鸭子:“哦,那就好,我需要一双鞋。”
相关问题
java用maven引入ffmpeg的方式实现添加水印的功能
要在Java项目中使用Maven引入FFmpeg并实现添加水印的功能,首先需要在项目的pom.xml文件中添加FFmpeg的依赖,然后使用Java代码调用FFmpeg的命令来实现添加水印的功能。
首先,在pom.xml文件中添加如下依赖:
```
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv-platform</artifactId>
<version>1.5.4</version>
</dependency>
```
然后可以使用JavaCV库的`FFmpegFrameRecorder`类来调用FFmpeg的命令,来实现添加水印的功能。下面是一个示例代码,它将在视频文件的左上角添加一个水印文本:
```java
import org.bytedeco.javacv.FFmpegFrameRecorder;
public class WatermarkAdder {
public static void addWatermark(String inputFile, String outputFile, String watermarkText) throws Exception {
FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFile, 640, 480);
recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
recorder.setFormat("flv");
recorder.setFrameRate(30);
recorder.start();
FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(inputFile);
grabber.start();
CanvasFrame canvasFrame = new CanvasFrame("Watermark Adder", CanvasFrame.getDefaultGamma() / grabber.getGamma());
canvasFrame.setCanvasSize(grabber.getImageWidth(), grabber.getImageHeight());
Frame frame;
while ((frame = grabber.grab()) != null) {
Graphics graphics = canvasFrame.getGraphics();
graphics.setColor(Color.RED);
graphics.setFont(new Font("Arial", Font.BOLD, 30));
graphics.drawString(watermarkText, 0, 30);
canvasFrame.showImage(frame);
recorder.record(frame);
}
grabber.stop();
recorder.stop();
canvasFrame.dispose();
}
}
```
使用方法
```java
WatermarkAdder.addWatermark("input.mp4", "output.mp4", "watermark text");
```
你可能需要安装 ff
FFmpeg C++实现视频水印
要在视频中添加水印,可以使用 FFmpeg 库中提供的过滤器来实现。以下是一个基本的 C 代码示例,它使用 FFmpeg 库中的过滤器来将文本水印添加到视频中:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libavformat/avformat.h>
#include <libavfilter/avfiltergraph.h>
#include <libavfilter/buffersrc.h>
#include <libavfilter/buffersink.h>
int main(int argc, char **argv) {
AVFilterContext *buffersrc_ctx;
AVFilterContext *buffersink_ctx;
AVFilterGraph *filter_graph;
int ret;
if (argc != 3) {
fprintf(stderr, "Usage: %s <input file> <output file>\n", argv[0]);
exit(1);
}
av_register_all();
avfilter_register_all();
AVFormatContext *fmt_ctx = NULL;
ret = avformat_open_input(&fmt_ctx, argv[1], NULL, NULL);
if (ret < 0) {
fprintf(stderr, "Could not open input file '%s'", argv[1]);
exit(1);
}
ret = avformat_find_stream_info(fmt_ctx, NULL);
if (ret < 0) {
fprintf(stderr, "Could not find stream information");
exit(1);
}
av_dump_format(fmt_ctx, 0, argv[1], 0);
AVCodecContext *codec_ctx = NULL;
int video_stream_index = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
if (video_stream_index < 0) {
fprintf(stderr, "Could not find video stream in input file");
exit(1);
}
AVStream *video_stream = fmt_ctx->streams[video_stream_index];
codec_ctx = video_stream->codec;
AVCodec *decoder = avcodec_find_decoder(codec_ctx->codec_id);
if (!decoder) {
fprintf(stderr, "Failed to find decoder for stream #%u codec ID %d\n", video_stream_index, codec_ctx->codec_id);
exit(1);
}
ret = avcodec_open2(codec_ctx, decoder, NULL);
if (ret < 0) {
fprintf(stderr, "Failed to open decoder for stream #%u\n", video_stream_index);
exit(1);
}
AVFrame *frame = av_frame_alloc();
AVPacket packet;
av_init_packet(&packet);
filter_graph = avfilter_graph_alloc();
char args[512];
snprintf(args, sizeof(args),
"drawtext=text='My Watermark':x=(w-text_w)/2:y=(h-text_h)/2:fontfile=/usr/share/fonts/truetype/freefont/FreeSerif.ttf:fontsize=48:fontcolor=white");
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();
enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE};
sprintf(args, "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
codec_ctx->width, codec_ctx->height, codec_ctx->pix_fmt,
video_stream->
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