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FFMPEG相关解密，打水印，合并，推流，

backend 2025/8/24 6:38:38

1：ffmepg进行打水印解密

前提ffmepg安装利用静态版就可以这个什么都有，不用再配置其他信息：（这个利用ffmpeg终端命令是没问题的，但是如果要是再C++中调用ffmpeg库那么还需要从新编译安装下）

各个版本

Index of /ffmpeg/old-releases

1.1 获取水印的列表

def get_json2txt(jsonpath):with open(jsonpath,'r',encoding='utf8')as fp:            datajson = json.load(fp)list_json = datajson["heart_beats"]watermark_texts =["none"]*20for i in range(len(list_json)):# text =[]train_id    =  "车号  "+list_json[i]['train_id']task_number =  "车次  "+list_json[i]['task_number']speed       =  "速度  "+str(list_json[i]['speed'])K_NUM = int(list_json[i]['mileage'])//1000LEF_NUM = int(list_json[i]['mileage'])%1000mileage     = "位置  "+f'K{K_NUM}+{LEF_NUM}'timetimestamp = int(list_json[i]['capturedAt'])dtime=dt.datetime.fromtimestamp(timetimestamp,tz=dt.timezone(dt.timedelta(hours=8)))formatted_time= "时间  "+ dtime.strftime("%Y-%m-%d %H-%M-%S")text= train_id +'\n' + task_number +'\n' + str(speed) +'\n' + mileage +'\n' +  formatted_timewatermark_texts[i]=text# print(text)return watermark_texts

1.2 将水印列表打印到视频上

def create_dynamic_watermark_stable(input_video, output_video, text_list,key):"""更稳定的动态水印实现方案使用时间表达式来模拟列表索引变化"""# 构建包含多个drawtext滤镜的命令filters = []for i, text in enumerate(text_list):# 每个文本显示1秒start_time = iend_time = i + 1filters.append(f"drawtext=text='{text}':fontcolor=white:fontsize=40:box=1:boxcolor=black@0.5:boxborderw=5:x=10:y=10:enable='between(t\\,{start_time}\\,{end_time})'")filter_str = ",".join(filters)cmd = ['/home/administrator/workspace/SJPTFF/ffmpeg-4.4.1-amd64-static/ffmpeg','-decryption_key',key,#这个是解密用'-i', input_video,'-vf', filter_str,'-c:a', 'copy',# '-c:v', 'copy','-y',output_video,]try:result = subprocess.run(cmd, capture_output=True, text=True)if result.returncode == 0:logger_ffmpeg.info(f"成功生成带动态水印的视频: {output_video}")else:logger_ffmpeg.error(f"处理视频时出错: {result.stderr}")except Exception as e:logger_ffmpeg.error(f"发生错误: {e}")

2 ffmpeg进行合并

 def concat_videos_subprocess(self,concatvideo,videoslist,flag=0):'''绝对路径，list内也包含绝对路径'''concat_videospath = os.path.dirname(concatvideo)concat_videos_path = os.path.join(os.path.dirname(concat_videospath),'videos_de')concat_list_txt = os.path.join(concat_videospath,'concat_list.txt')with open(concat_list_txt,"w") as f:# if flag:#     f.write(f"file '{concatvideo}' \n")for videos_path_index in range(len(videoslist)):videos_abspath = os.path.join(concat_videos_path,videoslist[videos_path_index][1])f.write(f"file '{videos_abspath}' \n")self.update_mile_time(videoslist,os.path.dirname(concat_videospath))output_path = concatvideo.rstrip('.mp4')+'temp.mp4'cmd = ['ffmpeg','-f','concat','-y','-safe','0','-i',concat_list_txt,'-c','copy',output_path]subprocess.run(cmd,check=True)os.system(f'cp {output_path}  {concatvideo}')

3 ffmpeg 进行推流

3.1 部署srs服务

SRS (Simple Realtime Server) 是一个用 C++ 编写的开源流媒体服务器，支持 RTMP、WebRTC、HLS、HTTP-FLV、SRT、GB28181 等多种协议。它设计简洁、性能高、易于部署，适合构建低延迟、高并发的实时音视频系统。

GitHub 项目地址：https://github.com/ossrs/srs

3.2 ffmpeg推流

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