{"id":118,"date":"2025-07-01T13:41:00","date_gmt":"2025-07-01T05:41:00","guid":{"rendered":"http:\/\/www.fishq.top\/?p=118"},"modified":"2025-08-02T21:26:17","modified_gmt":"2025-08-02T13:26:17","slug":"ffmpeg","status":"publish","type":"post","link":"https:\/\/www.fishq.top\/index.php\/2025\/07\/01\/ffmpeg\/","title":{"rendered":"FFmpeg\u7f16\u89e3\u7801"},"content":{"rendered":"\n<!-- \u8df3\u52a8\u5f69\u8272\u5c45\u4e2d\u65e5\u671f + \u5c0f\u732b -->\n<div style=\"text-align:center;font-size:28px;font-weight:bold;animation:j 1.2s ease-in-out infinite,c 3s linear infinite\">2025.7.01<span style=\"margin-left:6px\">\ud83d\udc31<\/span><\/div>\n<style>@keyframes j{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes c{0%{color:#f00}16.6%{color:#ff0}33.3%{color:#0f0}50%{color:#0ff}66.6%{color:#00f}83.3%{color:#f0f}100%{color:#f00}}<\/style>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/1.gif'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"190\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/1.gif\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-249\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001yuv\u7f16\u7801\u4e3ah264<\/h2>\n\n\n\n<p>\u4f7f\u7528yuv\u7f16\u7801\u4e3ah264\uff0c\u7136\u540e\u7528ffplay\u64ad\u653eh264\u6587\u4ef6<\/p>\n\n\n\n<p>\u5148\u51c6\u5907\u4e00\u4e2amp4\u6587\u4ef6 \u7136\u540e\u4f7f\u7528ffmpeg\u547d\u4ee4\u63d0\u53d6\u89c6\u9891\u6570\u636e\u5e76\u8f6c\u4e3ayuv\u683c\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -i input.mp4 -pixel_format yuv420p -s 1280x720 output.yuv<\/code><\/pre>\n\n\n\n<p>\u628a input.mp4 \u91cc\u7684\u89c6\u9891\u201c\u89e3\u7801 \u2192 \u989c\u8272\u8f6c\u6362 \u2192 \u7f29\u653e\u201d\u540e\uff0c\u6309 720p YUV420p \u7684\u88f8\u50cf\u7d20\u6d41\u8f93\u51fa\u5230 output.yuv\uff0c\u6ce8\u610f\u63d0\u53d6\u7684\u662f\u7eafYUV\u89c6\u9891\u6570\u636e\uff0c\u6ca1\u6709\u97f3\u9891\u6570\u636e\uff0c\u540e\u9762\u7f16\u7801\u540e\u64ad\u653e\u4e5f\u53ea\u662f\u89c6\u9891\u6570\u636e<\/p>\n\n\n\n<p>\u6700\u540e\u7f16\u7801\u6210\u529f\u7684h264\u53ef\u4ee5\u8fdb\u884cffplay\u64ad\u653e<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffplay -i input.264<\/code><\/pre>\n\n\n\n<p>\u7f16\u7801\u6d41\u7a0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/07\/Pasted-image-20250715233233.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"865\" height=\"490\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/07\/Pasted-image-20250715233233.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-104\"  sizes=\"auto, (max-width: 865px) 100vw, 865px\" \/><\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">yuv\u8f6ch264\u51fd\u6570\u4f53<\/mark><\/strong><\/p>\n\n\n\n<p>\u6574\u4f53\u6d41\u7a0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/07\/image.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"979\" height=\"486\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/07\/image.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-106\"  sizes=\"auto, (max-width: 979px) 100vw, 979px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/07\/image-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"538\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/07\/image-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-107\"  sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/07\/image-2.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"310\" height=\"76\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/07\/image-2.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-108\"  sizes=\"auto, (max-width: 310px) 100vw, 310px\" \/><\/div><\/figure>\n\n\n\n<p>pro.\u5de5\u7a0b\u6587\u4ef6\u94fe\u63a5\u5934\u6587\u4ef6\u548c\u5e93\u6587\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DEFINES += PROJECT_ROOT=\\\\\\\"$$PWD\\\\\\\" #.pro\u6587\u4ef6\u6240\u5728\u76ee\u5f55\n# \u5f53\u524d\u76ee\u5f55\u4e0b\u7684 FFMPEG_Packet\nFFMPEG_DIR = $$PWD\/ffmpeg_packet\nINCLUDEPATH += $$FFMPEG_DIR\/include\nLIBS += -L$$FFMPEG_DIR\/lib \\\n        -lavcodec \\\n        -lavformat \\\n        -lavutil \\\n        -lswresample \\\n        -lswscale<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>yuv2h264\u51fd\u6570<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int encoder::yuv2h264()\n{\n    QString projectRoot = QStringLiteral(PROJECT_ROOT); \/\/.pro\u6587\u4ef6\u6240\u5728\u76ee\u5f55\n    qDebug() &lt;&lt; projectRoot;\n    QString inFilePath = projectRoot + \"\/output.yuv\";\n    QString outFilePath = projectRoot + + \"\/output.h264\";\n    int ret = 0;\n    \/\/\u51c6\u5907\u7f16\u7801\u5668\n    const AVCodec* codec = nullptr;\n    AVCodecContext* codecContent = nullptr; \/\/\u4e0a\u4e0b\u6587\n    AVPacket* packet = nullptr;\n    AVFrame* frame = nullptr;\n    FILE* inFile = nullptr, *outFile = nullptr;\n\n    \/\/\u67e5\u627e264\u7f16\u7801\u5668\n    codec = avcodec_find_encoder(AV_CODEC_ID_H264);\n    if (!codec) {\n        qDebug() &lt;&lt; \"avcodec_find_decoder failed\";\n        return -1;\n    }\n\n    \/\/\u5206\u914d\u7f16\u7801\u5668\u4e0a\u4e0b\u6587\n    codecContent = avcodec_alloc_context3(codec);\n    if (!codecContent) { qDebug() &lt;&lt; \"avcodec_alloc_context3 failed\";\n        return -2;\n    }\n\n    \/\/\u8bbe\u7f6e\u4e0a\u4e0b\u6587\u53c2\u6570\n    codecContent-&gt;width = 1280;\n    codecContent-&gt;height = 720;\n    codecContent-&gt;time_base = AVRational{1,25};\n    codecContent-&gt;pix_fmt = AV_PIX_FMT_YUV420P;\n    codecContent-&gt;framerate = AVRational{25,1};\n\n    \/\/\u6253\u5f00\u7f16\u7801\u5668\n    ret = avcodec_open2(codecContent, codec, NULL);\n    if (ret != 0){\n        qDebug() &lt;&lt; \"avcodec_open2 failed\";\n        return -3;\n    }\n    \/\/\u5206\u914d\u7f16\u7801\u5305\n    packet = av_packet_alloc();\n    if (!packet) return -4;\n    \/\/\u5206\u914d\u7f16\u7801\u5e27\n    frame = av_frame_alloc();\n    if (!frame){\n        return -5;\n    }\n    \/\/\u8bbe\u7f6e\u5e27\u53c2\u6570\n    frame-&gt;width = 1280;\n    frame-&gt;height = 720;\n    frame-&gt;format = AV_PIX_FMT_YUV420P;\n    \/\/\u7533\u8bf7frame\u7684\u5185\u5b58\u6765\u5b58\u653e\u5e27\u6570\u636e\n    ret = av_frame_get_buffer(frame, 0);\n    if (ret){\n        qDebug() &lt;&lt; \"av_frame_get_buffer failed\";\n        return -6;\n    }\n\n    \/\/\u6253\u5f00\u8f93\u5165\u6587\u4ef6\u8bfb\u6570\u636e\n    inFile = fopen(inFilePath.toStdString().c_str(), \"rb\");\n    if (!inFile){\n        qDebug() &lt;&lt; \"open inFile failed\";\n        return -7;\n    }\n    \/\/\u6253\u5f00\u8f93\u51fa\u6587\u4ef6\n    outFile = fopen(outFilePath.toStdString().c_str(), \"wb\");\n    if (!outFile){\n        qDebug() &lt;&lt; \"open outFile failed\";\n        return -8;\n    }\n    int frame_count = 0;\n    \/\/\u5faa\u73af\u8bfb\u6570\u636e\u7f16\u7801\n    while (!feof(inFile)) {\n        ret = av_frame_is_writable(frame); \/\/\u68c0\u67e5frame\u662f\u5426\u53ef\u5199\n        if (ret &lt; 0){\n            \/\/\u6211\u4eec\u8981\u8bbe\u7f6e\u4e3a\u53ef\u5199\n            ret = av_frame_make_writable(frame);\n        }\n        \/\/ \u4eceyuv\u6587\u4ef6\u8bfb\u53d6y u v\u5206\u91cf\u5230frame\u4e2d \u7136\u540e\u7f16\u7801\n        fread(frame-&gt;data&#91;0], 1, frame-&gt;width * frame-&gt;height, inFile); \/\/y\u5206\u91cf\n        fread(frame-&gt;data&#91;1], 1, frame-&gt;width * frame-&gt;height \/ 4, inFile); \/\/u\u5206\u91cf\n        fread(frame-&gt;data&#91;2], 1, frame-&gt;width * frame-&gt;height \/ 4, inFile); \/\/v\u5206\u91cf\n        \n        frame-&gt;pts = frame_count++; \/\/\u8bbe\u7f6e\u5e27\u7684\u65f6\u95f4\u6233\n        \/\/\u771f\u6b63\u5730\u7f16\u7801\n        encode(codecContent, packet, frame, outFile);\n    }\n    \/\/\u7f16\u7801\u5b8c\u6210\u540e \u53d1\u9001\u7a7a\u7684\u5e27 \u544a\u8bc9\u7f16\u7801\u5668 \u5df2\u7ecf\u6ca1\u6709\u6570\u636e\u4e86 \u5237\u65b0\u7f16\u7801\u5668\n    encode(codecContent, packet, NULL, outFile);\n    qDebug() &lt;&lt; \"encode success\";\n    \/\/\u91ca\u653e\u8d44\u6e90\n    fclose(inFile);\n    fclose(outFile);\n    av_frame_free(&amp;frame);\n    av_packet_free(&amp;packet);\n    avcodec_free_context(&amp;codecContent);\n    return 0;\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">encode\u51fd\u6570\u4f53<\/mark><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int encoder::encode(AVCodecContext *codecContext, AVPacket *packet, AVFrame *frame, FILE *outFile)\n{\n    int ret = avcodec_send_frame(codecContext, frame);\n    if (ret &lt; 0){\n        qDebug() &lt;&lt; \"avcodec_send_frame failed\";\n        return -1;\n    }\n    \/\/ \u7f16\u7801\u6210\u529f\u5f00\u59cb\u5faa\u73af\u63a5\u6536\n    while (ret == 0) {\n        ret = avcodec_receive_packet(codecContext, packet);\n        if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF){\n            return 0;\n        }\n        else if(ret &lt; 0){ \/\/\u63a5\u6536\u5931\u8d25\n            return -1;\n        }\n        else if (ret == 0){\n            \/\/\u63a5\u6536\u6210\u529f \u5199\u5165\u5230\u8f93\u51fa\u6587\u4ef6\n            fwrite(packet-&gt;data, 1, packet-&gt;size, outFile);\n        }\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-1024x362.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"362\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-1024x362.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-124\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u7f16\u7801\u6210\u529f<\/p>\n\n\n\n<p>\u4ecelibx264\u7f16\u7801\u5668\u8f93\u51fa\u65e5\u5fd7\u4e2d\u53ef\u4ee5\u770b\u5230\u4e00\u4e9b\u4fe1\u606f\uff1a<\/p>\n\n\n\n<p>YUV 4:2:0\u8272\u5ea6\u62bd\u6837\uff0c8\u4f4d\u6df1\u5ea6\uff0c\u76ee\u6807\u7801\u7387\uff1a2032.23 kb\/s\uff0cI\u5e27(\u5173\u952e\u5e27)\uff1a5\u4e2a\uff0c\u5e73\u5747QP(\u91cf\u5316\u53c2\u6570)19.39\uff0c\u5e73\u5747\u5927\u5c0f27,843\u5b57\u8282\uff0cP\u5e27(\u9884\u6d4b\u5e27)\uff1a254\u4e2a\uff0c\u5e73\u5747QP 22.04\uff0c\u5e73\u5747\u5927\u5c0f11,583\u5b57\u8282\uff0cB\u5e27(\u53cc\u5411\u9884\u6d4b\u5e27)\uff1a101\u4e2a\uff0c\u5e73\u5747QP 23.26\uff0c\u5e73\u5747\u5927\u5c0f5,711\u5b57\u8282\uff0cB\u5e27\u8fde\u7eed\u6bd4\u4f8b\uff1a56.1%\u8fde\u7eedB\u5e27\uff0c16.7%\u975e\u8fde\u7eed<\/p>\n\n\n\n<p>\u6700\u540e\u7528ffplay\u64ad\u653e\u5373\u53ef<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/2.gif'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"190\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/2.gif\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-250\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001pcm\u7f16\u7801\u4e3aaac<\/h2>\n\n\n\n<p>\u4f7f\u7528pcm\u7f16\u7801\u4e3aaac\uff0c\u7136\u540e\u4f7f\u7528ffplay\u64ad\u653e<\/p>\n\n\n\n<p>\u5148\u51c6\u5907\u4e00\u4e2amp4\u6587\u4ef6 \u7136\u540e\u4f7f\u7528ffmpeg\u547d\u4ee4\u63d0\u53d6\u97f3\u9891\u6570\u636e\u5e76\u8f6c\u4e3apcm\u683c\u5f0f\uff0c\u8bbe\u7f6e\u97f3\u9891\u91c7\u6837\u7387\u4e3a44.1kHz\uff0c\u8bbe\u7f6e\u4e3a\u53cc\u58f0\u9053\u7acb\u4f53\u58f0\uff0c\u6307\u5b9a\u8f93\u51fa\u683c\u5f0f\u4e3a\u6709\u7b26\u53f716\u4f4d\u5c0f\u7aefPCM<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -i input.mp4 -ar 44100 -ac 2 -f s16le output.pcm<\/code><\/pre>\n\n\n\n<p>\u6700\u540e\u7f16\u7801\u6210\u529f\u7684aac\u53ef\u4ee5\u8fdb\u884cffplay\u64ad\u653e<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffplay -i output.aac<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"865\" height=\"489\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-133\"  sizes=\"auto, (max-width: 865px) 100vw, 865px\" \/><\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>pcm\u8f6caac\u51fd\u6570\u6574\u4f53\u6d41\u7a0b<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-2.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"958\" height=\"718\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-2.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-134\"  sizes=\"auto, (max-width: 958px) 100vw, 958px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-5.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"634\" height=\"429\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-5.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-137\"  sizes=\"auto, (max-width: 634px) 100vw, 634px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-6.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"99\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/02\/image-6.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-138\"  sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">pcm2aac\u51fd\u6570\u4f53<\/mark><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int encoder::pcm2aac()\n{\n    QString projectRoot = QStringLiteral(PROJECT_ROOT); \/\/.pro\u6587\u4ef6\u6240\u5728\u76ee\u5f55\n    qDebug() &lt;&lt; projectRoot;\n    QString inputfile = projectRoot + \"\/output.pcm\";\n    QString outputfile = projectRoot + \"\/output.aac\";\n    \/\/1. \u67e5\u627e\u7f16\u7801\u5668\n    const AVCodec* avcodec = avcodec_find_encoder(AV_CODEC_ID_AAC);\n    if (!avcodec){\n        qDebug() &lt;&lt; \"avcodec_find_encoder failed\";\n        return -1;\n    }\n\n    \/\/2. \u8bbe\u7f6e\u7f16\u7801\u5668\n    \/\/\u5206\u914d\u7f16\u7801\u5668\u4e0a\u4e0b\u6587\n    AVCodecContext* avcodecContext = avcodec_alloc_context3(avcodec);\n    if (!avcodecContext){\n        qDebug() &lt;&lt; \"avcodec_alloc_context3 failed\";\n        return -2;\n    }\n    \/\/\u8bbe\u7f6e\u4e0a\u4e0b\u6587\u53c2\u6570\n    avcodecContext-&gt;sample_rate = 44100; \/\/\u91c7\u6837\u7387\n    avcodecContext-&gt;channels = 2; \/\/\u901a\u9053\u6570\n    avcodecContext-&gt;sample_fmt = AV_SAMPLE_FMT_FLTP; \/\/\u6837\u672c\u683c\u5f0f\n    avcodecContext-&gt;channel_layout = AV_CH_LAYOUT_STEREO; \/\/\u58f0\u9053\u5e03\u5c40 \/\/\u7acb\u4f53\u58f0\n    avcodecContext-&gt;bit_rate = 64000; \/\/\u6bd4\u7279\u7387\n\n    \/\/3. \u6253\u5f00\u89e3\u7801\u5668\n    int ret = 0;\n    ret = avcodec_open2(avcodecContext, avcodec, NULL);\n    if (ret != 0){ qDebug() &lt;&lt; \"avcodec_open2 failed\";\n        return -3;\n    }\n\n    \/\/4. \u5206\u914d\u521b\u5efa\u8f93\u51fa\u4e0a\u4e0b\u6587\n    AVFormatContext* avFormatContext = nullptr;\n    avformat_alloc_output_context2(&amp;avFormatContext, NULL, NULL, outputfile.toStdString().c_str());\n    if (!avFormatContext){\n        qDebug() &lt;&lt; \"avformat_alloc_output_context2 failed\";\n        return -4;\n    }\n\n    \/\/5. \u521b\u5efa\u6d41\u5e76\u6dfb\u52a0\u5230 AVFormatContext \u8f93\u51fa\u4e0a\u4e0b\u6587\u4e2d \u4e00\u4e2a AVFormatContext \u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u6d41\uff0c\u4f8b\u5982\u89c6\u9891\u6d41\u548c\u97f3\u9891\u6d41\n    AVStream* st = avformat_new_stream(avFormatContext, NULL);\n    if (!st){\n        qDebug() &lt;&lt; \"avformat_new_stream failed\";\n        return -5;\n    }\n\n    \/\/6. \u8bbe\u7f6e\u6d41\u53c2\u6570 \u5c06\u7f16\u7801\u5668\u4e0a\u4e0b\u6587\u7684\u53c2\u6570\u590d\u5236\u5230\u6d41\u7684\u53c2\u6570 \u4fdd\u4e86\u6d41\u7684\u53c2\u6570\u4e0e\u7f16\u7801\u5668\u7684\u53c2\u6570\u4e00\u81f4\n    avcodec_parameters_from_context(st-&gt;codecpar, avcodecContext);\n\n    \/\/7. \u6253\u5f00\u8f93\u51fa\u6587\u4ef6\n    ret = avio_open(&amp;avFormatContext-&gt;pb, outputfile.toStdString().c_str(), AVIO_FLAG_WRITE);\n    if (ret &lt; 0){\n        qDebug() &lt;&lt; \"avio_open failed\";\n        return -6;\n    }\n\n    \/\/8. \u5199\u5165\u6587\u4ef6\u5934\u4fe1\u606f \uff08\u5305\u62ec\u5c01\u88c5\u683c\u5f0f\u7684\u7279\u5b9a\u4fe1\u606f \u6d41\u4fe1\u606f(\u6587\u4ef6\u5934\u4e2d\u4f1a\u5305\u542b\u6bcf\u4e2a\u6d41\u7684\u53c2\u6570\u8fd9\u4e9b\u4fe1\u606f\u662f\u4ece\u4e0a\u4e0b\u6587\u83b7\u53d6\u7684)\uff09\n    avformat_write_header(avFormatContext, NULL);\n\n    \/\/9. \u521d\u59cb\u5316\u91cd\u91c7\u6837 \uff08\u8bbe\u7f6e\u91cd\u91c7\u6837\u53c2\u6570 \u521d\u59cb\u5316\u91cd\u91c7\u6837\u4e0a\u4e0b\u6587\uff09\n    SwrContext* swrContext = nullptr;\n    \/\/\u8bbe\u7f6e\u91cd\u91c7\u6837\u53c2\u6570\n    swrContext = swr_alloc_set_opts(swrContext, avcodecContext-&gt;channel_layout, avcodecContext-&gt;sample_fmt,\n                                    avcodecContext-&gt;sample_rate, AV_CH_LAYOUT_STEREO, AV_SAMPLE_FMT_S16, 44100, 0, 0);\n    if (!swrContext){\n        qDebug() &lt;&lt; \"swr_alloc_set_opts failed\";\n        return -7;\n    }\n\n    ret = swr_init(swrContext); \/\/\u521d\u59cb\u5316\u91cd\u91c7\u6837\u4e0a\u4e0b\u6587\n    if (ret &lt; 0){ \/\/\u770b\u770b\u53c2\u6570\u662f\u5426\u5408\u7406\n        qDebug() &lt;&lt; \"swr_init failed\";\n        return -7;\n    }\n\n    \/\/10. \u51c6\u5907frame\u97f3\u9891\u5e27 \uff08\u5206\u914d\u97f3\u9891\u5e27 \u8bbe\u7f6e\u5e27\u53c2\u6570 \u4e3a\u5e27\u5206\u914d\u5185\u5b58\uff09\n    AVFrame* frame = nullptr;\n    frame = av_frame_alloc(); \/\/\u5206\u914d\u97f3\u9891\u5e27\n\n    \/\/\u8bbe\u7f6eframe\u53c2\u6570\n    frame-&gt;format = AV_SAMPLE_FMT_FLTP; \/\/\u5e27\u683c\u5f0f\n    frame-&gt;channels = 2; \/\/\u901a\u9053\u6570\n    frame-&gt;channel_layout = AV_CH_LAYOUT_STEREO; \/\/\u58f0\u9053\u5e03\u5c40 \u7acb\u4f53\u58f0\n    frame-&gt;nb_samples = 1024; \/\/\u6837\u672c\u70b9\u6570\u91cf\n    \/\/\u4e3a\u5e27\u5206\u914d\u5185\u5b58\n    ret = av_frame_get_buffer(frame, 0);\n    if (ret &lt; 0){\n        qDebug() &lt;&lt; \"av_frame_get_buffer failed\";\n        return -8;\n    }\n\n    \/*\u7f16\u7801\u9636\u6bb5*\/\n    \/\/\u5f00\u59cb\u8bfbpcm\u6570\u636e -&gt; frame\n    int readSize = frame-&gt;nb_samples * 2 * 2; \/\/\u6bcf\u6b21\u9700\u8981\u8bfb\u7684\u5927\u5c0f\n    char* pcms = new char&#91;readSize]; \/\/\u7533\u8bf7\u5185\u5b58\n    \/\/11. \u6253\u5f00\u8f93\u5165\u6587\u4ef6\n    FILE* fp = fopen(inputfile.toStdString().c_str(), \"rb\");\n    if (!fp){\n        qDebug() &lt;&lt; \"fopen inputfile failed\";\n        return -9;\n    }\n\n    \/\/\u5f00\u59cb\u7f16\u7801\n    \/\/12. \u5faa\u73af\u8bfb\u6570\u636e\u7f16\u7801\u5e76\u5199\u5165\u8f93\u51fa\u6587\u4ef6(\u8bfb\u53d6pcm\u6570\u636e \u91cd\u91c7\u6837 \u7f16\u7801\u5199\u5165\u8f93\u51fa\u6587\u4ef6_\n    for(;;){\n        AVPacket pkt;\n        av_init_packet(&amp;pkt); \/\/\u521d\u59cb\u5316\u6570\u636e\u5305Packet\u5b58\u50a8\u7f16\u7801\u540e\u7684\u97f3\u9891\u6570\u636e\n        int len = fread(pcms,1,readSize, fp); \/\/\u8bfb\u53d6 PCM \u6570\u636e\n        if (len &lt;= 0){ \/\/\u8bfb\u53d6\u5230\u6587\u4ef6\u672b\u5c3e\u6216\u53d1\u751f\u9519\u8bef\n            \/\/\u5237\u65b0\u7f16\u7801\n            avcodec_send_frame(avcodecContext, nullptr);\n            while (avcodec_receive_packet(avcodecContext, &amp;pkt) != AVERROR_EOF);\n            \/\/\u5faa\u73af\u63a5\u6536\u7f16\u7801\u5668\u8f93\u51fa\u7684\u5269\u4f59\u6570\u636e\u5305 \u76f4\u5230\u6ca1\u6709\u66f4\u591a\u6570\u636e\n            break;\n        }else{\n            \/\/\u5f00\u59cb\u91cd\u91c7\u6837 \u5c06 PCM \u6570\u636e\u4ece\u539f\u59cb\u683c\u5f0f\u8f6c\u6362\u4e3a\u7f16\u7801\u5668\u6240\u9700\u7684\u683c\u5f0f\n            const uint8_t* data&#91;1];\n            data&#91;0] = (uint8_t*) pcms;\n\n            \/\/\u91cd\u91c7\u6837\u64cd\u4f5c\n            ret = swr_convert(swrContext, frame-&gt;data, frame-&gt;nb_samples, data, frame-&gt;nb_samples);\n            if (ret &lt;= 0){\n                qDebug() &lt;&lt; \"swr_convert failed\";\n                break;\n            }\n\n            \/\/ \u8bbe\u7f6e\u5e27\u7684\u65f6\u95f4\u6233\n            static int frame_count = 0;\n            frame-&gt;pts = frame_count++;\n\n            \/\/\u91cd\u91c7\u6837\u6210\u529f \u6211\u4eec\u7f16\u7801\u6570\u636e\n            ret = avcodec_send_frame(avcodecContext, frame);\n            if (ret &lt; 0){ \/\/\u7f16\u7801\u5931\u8d25\n                qDebug() &lt;&lt; \"avcodec_send_frame failed\";\n                continue; \/\/\u7ee7\u7eed\u7f16\u7801\u4e0b\u4e00\u5e27\n            }\n            ret = avcodec_receive_packet(avcodecContext, &amp;pkt);\n            if (ret == 0){\n                \/\/\u63a5\u6536\u6210\u529f \u5c06AVPacket\u538b\u7f29\u6570\u636e\u5199\u5165\u5230\u8f93\u51fa\u6587\u4ef6\n                av_interleaved_write_frame(avFormatContext, &amp;pkt);\n            }\n        }\n    }\n    \/\/13. \u5199\u5165\u6587\u4ef6\u5c3e\u4fe1\u606f\n    av_write_trailer(avFormatContext);\n    \/\/14. \u5237\u65b0\u7f16\u7801\u5668\n    avcodec_send_frame(avcodecContext, nullptr);\n    \/\/15. \u91ca\u653e\u8d44\u6e90\n    fclose(fp);\n    avio_close(avFormatContext-&gt;pb);\n    avcodec_free_context(&amp;avcodecContext);\n    avformat_free_context(avFormatContext);\n    return 0;\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u53ef\u4ee5\u53d1\u73b0pcm\u8f6caac\u7684\u7f16\u7801\u597d\u50cf\u8981\u6bd4yuv\u8f6ch264\u590d\u6742\uff0c\u591a\u4e86\u4e0b\u9762\u4e00\u4e9b\u6b65\u9aa4\uff1a\u4e00\u4e2a\u662f\u8981\u53bb\u521b\u5efa\u6d41 \u4ee5\u53ca\u8bbe\u7f6e\u6d41\u53c2\u6570\u548c\u7f16\u7801\u5668\u4e0a\u4e0b\u6587\u53c2\u6570\u4e00\u81f4 \u8fd8\u6709\u4e00\u4e2a\u662f\u8981\u5199\u5165\u6587\u4ef6\u5934\u4fe1\u606f\u6587\u4ef6\u5c3e\u4fe1\u606f \u8fd8\u6709\u8981\u8fdb\u884c\u91cd\u91c7\u6837\u540e\u624d\u80fd\u7f16\u7801<br>\u8fd9\u4e9b\u5dee\u5f02\u6e90\u4e8e\u97f3\u9891\u7f16\u7801\u7684\u65f6\u5e8f\u654f\u611f\u6027\uff08\u9700\u8981\u7cbe\u786e\u5230\u91c7\u6837\u70b9\uff09\u548c\u5bb9\u5668\u683c\u5f0f\u7684\u5f3a\u5236\u6027\u8981\u6c42\u3002\u89c6\u9891\u7f16\u7801\u7531\u4e8e\u5e27\u72ec\u7acb\u6027\u66f4\u5f3a\uff0c\u5904\u7406\u6d41\u7a0b\u76f8\u5bf9\u7b80\u5355\u3002\uff08\u5177\u4f53\u9700\u8981\u66f4\u6df1\u5165\u7684\u53bb\u4e86\u89e3<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">aac\u7f16\u7801\u683c\u5f0f<\/mark><\/strong>\u548c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">h264\u7f16\u7801\u683c\u5f0f<\/mark><\/strong>\uff09<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">\u5173\u4e8e\u4e3a\u4ec0\u4e48\u9700\u8981\u521b\u5efa\u6d41\u548c\u8ba9\u6d41\u53c2\u6570\u548c\u7f16\u7801\u5668\u53c2\u6570\u4e00\u81f4\uff0c\u800c\u4e4b\u524d\u7684yuv\u8f6ch264\u4e0d\u7528\uff1a<\/mark><\/strong><\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">H264\u88f8\u6d41\u901a\u8fc7SPS\/PPS\u81ea\u5e26\u53c2\u6570\uff0c\u89c6\u9891\u5e27\u81ea\u5e26\u65f6\u95f4\u6233\u548c\u5173\u952e\u5e27\u6807\u8bb0<\/mark><\/strong>\uff0c\u800cAAC\u9700\u8981\u6d41\u4f5c\u4e3a\u6570\u636e\u8f7d\u4f53\uff0c\u6d41\u5bf9\u8c61\u5b58\u50a8\u7740\u65f6\u95f4\u57fa(time_base)\u3001\u7f16\u7801\u53c2\u6570\u7b49\u5173\u952e\u4fe1\u606f\uff0c\u540c\u65f6\u8981\u786e\u4fdd\u5c01\u88c5\u65f6\u4f7f\u7528\u7684\u53c2\u6570\u4e0e\u7f16\u7801\u5668\u4e00\u81f4\uff0c\u4e0d\u7136\u53ef\u80fd\u51fa\u73b0\u91c7\u6837\u7387\/\u58f0\u9053\u6570\u4e0d\u5339\u914d\u7b49\u95ee\u9898<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">\u5173\u4e8e\u4e3a\u4ec0\u4e48\u9700\u8981\u5199\u5165\u6587\u4ef6\u5934\u548c\u6587\u4ef6\u5c3e \uff1a<\/mark><\/strong><br>\u97f3\u9891\u88f8\u6d41AAC\u9700\u8981<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">ADTS\u5934<\/mark><\/strong>\u8bb0\u5f55\u91c7\u6837\u7387\u3001\u58f0\u9053\u6570\u7b49\u5143\u4fe1\u606f\uff0c\u540c\u65f6ADTS\u8fd8\u5305\u542b<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u540c\u6b65\u5b57<\/mark><\/strong>\u5b57\u6bb5\uff0c\u7528\u4e8e\u5b9a\u4f4d\u5e27\u8d77\u59cb\u4f4d\u7f6e\uff0c\u7528\u4e8e\u5e27\u540c\u6b65\u800c\u89c6\u9891\u88f8\u6d41(H264)\u81ea\u5e26\u5e27\u540c\u6b65\u4fe1\u606f <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">\uff08\u53ef\u4ee5\u770b\u770baac\u97f3\u9891\u5206\u6790\u90a3\u4e00\u7bc7\uff09<\/mark><\/strong><\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:19% auto\"><figure class=\"wp-block-media-text__media\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/aac.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" data-original=\"https:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/aac.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-332 size-full\"  sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/div><\/figure><div class=\"wp-block-media-text__content\">\n<p><a href=\"https:\/\/www.fishq.top\/index.php\/2025\/07\/08\/aac\/\">aac\u97f3\u9891\u5206\u6790 \u2013 FISHQ\u4e2a\u4eba\u535a\u5ba2<\/a><\/p>\n<\/div><\/div>\n\n\n\n<p>\u53ef\u4ee5\u8fdb\u884c\u4e00\u4e2a\u5bf9\u6bd4\u770b\u770b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H264\u88f8\u6d41\uff08\u5982 .h264 \u6587\u4ef6\uff09\u901a\u8fc7NALU(Network Abstraction Layer Unit)\u5355\u5143\u7ec4\u7ec7\u6570\u636e<\/li>\n\n\n\n<li>\u6bcf\u4e2aNALU\u4ee5 00 00 00 01 \u6216 00 00 01 \u4f5c\u4e3a\u8d77\u59cb\u7801(Sync Byte)<\/li>\n\n\n\n<li>\u5173\u952e\u5e27(I\u5e27)\u81ea\u5e26SPS\/PPS\u53c2\u6570\u96c6\uff0c\u5305\u542b\uff1aSPS(Sequence Parameter Set)\uff0cprofile_idc\/level_idc\/\u5e27\u7387\/\u5206\u8fa8\u7387\u7b49\uff1bPPS(Picture Parameter Set) \u71b5\u7f16\u7801\u7c7b\u578b\/\u5207\u7247\u7ec4\u6570\u7b49<\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u6b64\u53ef\u4ee5\u76f4\u63a5\u5199\u5165\u6587\u4ef6\uff0c\u64ad\u653e\u5668\u901a\u8fc7\u89e3\u6790NALU\u5934\u5373\u53ef\u540c\u6b65\u89e3\u7801<\/p>\n\n\n\n<p>ADTS\u5934\u662fAAC\u97f3\u9891\u6d41\u7684\u4e00\u90e8\u5206 \uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ADTS(Audio Data Transport Stream)\u5934\u662fAAC\u88f8\u6d41(\u539f\u59cbAAC\u6570\u636e)\u81ea\u5e26\u7684\u5934\u90e8\u4fe1\u606f<\/li>\n\n\n\n<li>\u6bcf\u4e2aAAC\u6570\u636e\u5e27\u524d\u90fd\u67097-9\u5b57\u8282\u7684ADTS\u5934\uff08\u7c7b\u4f3cH264\u7684NALU\u5934\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u97f3\u9891\u5e27\u6ca1\u6709\u7c7b\u4f3c\u89c6\u9891\u7684\u5173\u952e\u5e27\u6982\u5ff5\uff0c\u6240\u4ee5\u9700\u8981\u5bb9\u5668\u5934\u7ef4\u62a4\uff0c\u800c\u6587\u4ef6\u5c3e\u5199\u5165\u7528\u4e8e\u66f4\u65b0\u6700\u7ec8\u7684\u5e27\u8ba1\u6570\u548c\u65f6\u957f\u7edf\u8ba1<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">\u5173\u4e8e\u7f16\u7801\u524d\u4e3a\u4ec0\u4e48\u9700\u8981\u91cd\u91c7\u6837\uff1a<\/mark><\/strong><\/p>\n\n\n\n<p>\u8f93\u5165PCM\u901a\u5e38\u662fS16\u683c\u5f0f\uff0c\u800cAAC\u7f16\u7801\u5668\u9700\u8981FLTP\u683c\u5f0f\uff0c\u800c\u89c6\u9891YUV420P\u53ef\u4ee5\u76f4\u63a5\u88abH264\u7f16\u7801\u5668\u63a5\u53d7<\/p>\n\n\n\n<p>\u97f3\u9891\u91cd\u91c7\u6837\u8fd8\u5904\u7406\u4e86\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u58f0\u9053\u6df7\u5408\/\u5206\u79bb<\/li>\n\n\n\n<li>\u91c7\u6837\u70b9\u5bf9\u9f50(1024 samples\/frame)<\/li>\n\n\n\n<li>\u6bd4\u7279\u6df1\u5ea6\u8f6c\u6362<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>2025.7.01\ud83d\udc31 \u4e00\u3001yuv\u7f16\u7801\u4e3ah264 \u4f7f\u7528yuv\u7f16\u7801\u4e3ah264\uff0c\u7136\u540e\u7528ffplay\u64ad\u653eh264\u6587\u4ef6  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":330,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[5,4],"tags":[],"class_list":["post-118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ffmpeg","category-4"],"modified_by":"FISHQ","_links":{"self":[{"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/posts\/118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/comments?post=118"}],"version-history":[{"count":28,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/posts\/118\/revisions"}],"predecessor-version":[{"id":1126,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/posts\/118\/revisions\/1126"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/media\/330"}],"wp:attachment":[{"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/media?parent=118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/categories?post=118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/tags?post=118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}