{"id":25298,"date":"2024-03-17T04:03:47","date_gmt":"2024-03-16T19:03:47","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%a7ffmpeg%e3%82%92%e5%91%bc%e3%81%b3%e5%87%ba%e3%81%99%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2024-03-22T11:10:05","modified_gmt":"2024-03-22T02:10:05","slug":"c%e8%a8%80%e8%aa%9e%e3%81%a7ffmpeg%e3%82%92%e5%91%bc%e3%81%b3%e5%87%ba%e3%81%99%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%a7ffmpeg%e3%82%92%e5%91%bc%e3%81%b3%e5%87%ba%e3%81%99%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"C\u8a00\u8a9e\u3067FFmpeg\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"

C\u8a00\u8a9e\u3067FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\u3001FFmpeg\u304c\u63d0\u4f9b\u3059\u308bAPI\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u97f3\u58f0\u304a\u3088\u3073\u30d3\u30c7\u30aa\u51e6\u7406\u3092\u884c\u3046\u305f\u3081\u306bFFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u57fa\u672c\u7684\u306a\u624b\u9806\u3067\u3059\u3002<\/p>\n

    \n
  1. FFmpeg\u306e\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u3059\u308b\u3002<\/li>\n<\/ol>\n
    #include<\/span> <libavcodec\/avcodec.h><\/span><\/span>\r\n#include<\/span> <libavformat\/avformat.h><\/span><\/span>\r\n#include<\/span> <libavutil\/imgutils.h><\/span><\/span>\r\n#include<\/span> <libswscale\/swscale.h><\/span><\/span>\r\n<\/code><\/pre>\n
      \n
    1. FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u521d\u671f\u5316\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
      av_register_all();\r\n<\/code><\/pre>\n
        \n
      1. \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\uff1a<\/li>\n<\/ol>\n
        AVFormatContext *formatContext = NULL<\/span>;\r\nif<\/span>(avformat_open_input(&formatContext, inputFileName, NULL<\/span>, NULL<\/span>) != 0<\/span>) {\r\n    \/\/ \u6253\u5f00\u6587\u4ef6\u5931\u8d25\uff0c\u5904\u7406\u9519\u8bef<\/span>\r\n}\r\n<\/code><\/pre>\n
          \n
        1. \u97f3\u58f0\u304a\u3088\u3073\u30d3\u30c7\u30aa\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
          if<\/span> (avformat_find_stream_info(formatContext, NULL<\/span>) < 0<\/span>) {\r\n    \/\/ \u83b7\u53d6\u6d41\u4fe1\u606f\u5931\u8d25\uff0c\u5904\u7406\u9519\u8bef<\/span>\r\n}\r\n<\/code><\/pre>\n
            \n
          1. \u30d3\u30c7\u30aa\u30b9\u30c8\u30ea\u30fc\u30e0\u3068\u30aa\u30fc\u30c7\u30a3\u30aa\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u691c\u7d22\u3059\u308b\uff1a<\/li>\n<\/ol>\n
            int<\/span> videoStreamIndex = -1<\/span>;\r\nint<\/span> audioStreamIndex = -1<\/span>;\r\nfor<\/span> (int<\/span> i = 0<\/span>; i < formatContext->nb_streams; i++) {\r\n    if<\/span> (formatContext->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {\r\n        videoStreamIndex = i;\r\n    } else<\/span> if<\/span> (formatContext->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {\r\n        audioStreamIndex = i;\r\n    }\r\n}\r\n<\/code><\/pre>\n
              \n
            1. \u30d3\u30c7\u30aa\u30c7\u30b3\u30fc\u30c0\u30fc\u3092\u30aa\u30fc\u30d7\u30f3\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n
              AVCodecContext *videoCodecContext = avcodec_alloc_context3(NULL<\/span>);\r\navcodec_parameters_to_context(videoCodecContext, formatContext->streams[videoStreamIndex]->codecpar);\r\nAVCodec *videoCodec = avcodec_find_decoder(videoCodecContext->codec_id);\r\navcodec_open2(videoCodecContext, videoCodec, NULL<\/span>);\r\n<\/code><\/pre>\n
                \n
              1. \u30d3\u30c7\u30aa\u30d5\u30ec\u30fc\u30e0\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308b\u3002<\/li>\n<\/ol>\n
                AVPacket *packet = av_packet_alloc();\r\nAVFrame *frame = av_frame_alloc();\r\nwhile<\/span> (av_read_frame(formatContext, packet) >= 0<\/span>) {\r\n    if<\/span> (packet->stream_index == videoStreamIndex) {\r\n        avcodec_send_packet(videoCodecContext, packet);\r\n        while<\/span> (avcodec_receive_frame(videoCodecContext, frame) == 0<\/span>) {\r\n            \/\/ \u5904\u7406\u89c6\u9891\u5e27\u6570\u636e<\/span>\r\n        }\r\n    }\r\n    av_packet_unref(packet);\r\n}\r\n<\/code><\/pre>\n
                  \n
                1. \u30c7\u30b3\u30fc\u30c0\u30fc\u3092\u9589\u3058\u3001\u5165\u529b\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u307e\u3059\u3002<\/li>\n<\/ol>\n
                  avcodec_free_context(&videoCodecContext);\r\navformat_close_input(&formatContext);\r\n<\/code><\/pre>\n
                  FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u3066\u97f3\u58f0\u304a\u3088\u3073\u52d5\u753b\u51e6\u7406\u3092\u884c\u3046\u305f\u3081\u306e\u57fa\u672c\u64cd\u4f5c\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u304c\u3001\u5b9f\u969b\u306e\u30cb\u30fc\u30ba\u306b\u5fdc\u3058\u3066\u5177\u4f53\u7684\u306a\u65b9\u6cd5\u3084\u6a5f\u80fd\u3092\u8abf\u6574\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001FFmpeg\u304c\u63d0\u4f9b\u3059\u308b\u4ed6\u306eAPI\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u97f3\u58f0\u304a\u3088\u3073\u52d5\u753b\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u3001\u30d1\u30c3\u30b1\u30fc\u30b8\u30f3\u30b0\u3001\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306a\u3069\u306e\u64cd\u4f5c\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                  C\u8a00\u8a9e\u3067FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\u3001FFmpeg\u304c\u63d0\u4f9b\u3059\u308bAPI\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u97f3\u58f0\u304a\u3088\u3073\u30d3\u30c7\u30aa\u51e6\u7406\u3092\u884c\u3046\u305f\u3081\u306bFFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u57fa\u672c\u7684\u306a\u624b\u9806\u3067\u3059\u3002 FFmpeg\u306e\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-25298","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nC\u8a00\u8a9e\u3067FFmpeg\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/c\u8a00\u8a9e\u3067ffmpeg\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u8a00\u8a9e\u3067FFmpeg\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"C\u8a00\u8a9e\u3067FFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\u3001FFmpeg\u304c\u63d0\u4f9b\u3059\u308bAPI\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u97f3\u58f0\u304a\u3088\u3073\u30d3\u30c7\u30aa\u51e6\u7406\u3092\u884c\u3046\u305f\u3081\u306bFFmpeg\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u57fa\u672c\u7684\u306a\u624b\u9806\u3067\u3059\u3002 FFmpeg\u306e\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/c\u8a00\u8a9e\u3067ffmpeg\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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