{"id":654,"date":"2022-02-10T18:35:26","date_gmt":"2022-02-10T10:35:26","guid":{"rendered":"http:\/\/124.223.94.246\/?p=654"},"modified":"2022-06-11T02:55:40","modified_gmt":"2022-06-10T18:55:40","slug":"ffmpeg%e5%91%bd%e4%bb%a4%e5%88%86%e6%9e%90-pix_fmt","status":"publish","type":"post","link":"https:\/\/www.xianwaizhiyin.net\/?p=654","title":{"rendered":"ffmpeg\u547d\u4ee4\u5206\u6790-pix_fmt"},"content":{"rendered":"\n<p>\u672c\u7cfb\u5217 \u4ee5 ffmpeg4.2 \u6e90\u7801\u4e3a\u51c6\uff0c\u4e0b\u8f7d\u5730\u5740\uff1a\u94fe\u63a5\uff1a<a href=\"https:\/\/pan.baidu.com\/s\/1VpUvpLhew-nuq4Dns80mOw\">\u767e\u5ea6\u7f51\u76d8<\/a> \u63d0\u53d6\u7801\uff1ag3k8<\/p>\n\n\n\n<p>\u672c\u7cfb\u5217\u4e3b\u8981\u5206\u6790\u5404\u79cd ffmpeg \u547d\u4ee4\u53c2\u6570 \u5728\u4ee3\u7801\u91cc\u662f\u5982\u4f55\u5b9e\u73b0\u7684\u3002a.mp4\u4e0b\u8f7d\u94fe\u63a5\uff1a<a href=\"https:\/\/pan.baidu.com\/s\/1RN1xRsQDGx65MGyB_T1IzA\">\u767e\u5ea6\u7f51\u76d8<\/a>\uff0c\u63d0\u53d6\u7801\uff1anl0s<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >ffmpeg -vcodec h264 -i a.mp4 -pix_fmt nv12 -vcodec h264_mf -acodec copy a_h264_nvenc.mp4 -y<\/code><\/pre>\n\n\n\n<p>\u4e0a\u9762\u7684\u547d\u4ee4\u662f\u89e3\u7801\uff0c\u7136\u540e\u7f16\u7801\uff0c\u672c\u6587\u4e0d\u5173\u6ce8\u7f16\u89e3\u7801\uff0c\u4e3b\u8981\u5206\u6790 <code class=\"prettyprint\" >-pix_fmt nv12<\/code> \u53c2\u6570\uff0c\u7531\u4e8e\u4e00\u4e9b\u786c\u4ef6\u7f16\u7801\u5668\u53ea\u652f\u6301\u7279\u5b9a\u7684\u50cf\u7d20\u683c\u5f0f\uff0c\u6240\u4ee5\u9700\u8981 --pix_fmt \u6307\u5b9a\u7f16\u7801\u5668\u7684 pix_fmt\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);\n\/\/\u7701\u7565\u4ee3\u7801\u3002\nif (frame_pix_fmt &amp;&amp; (video_enc-&gt;pix_fmt = av_get_pix_fmt(frame_pix_fmt)) == AV_PIX_FMT_NONE) {\n    av_log(NULL, AV_LOG_FATAL, &quot;Unknown pixel format requested: %s.\\n&quot;, frame_pix_fmt);\n    exit_program(1);\n}<\/code><\/pre>\n\n\n\n<p>\u91cd\u70b9\u4ee3\u7801\u662f <code class=\"prettyprint\" >video_enc-&gt;pix_fmt = av_get_pix_fmt(frame_pix_fmt)<\/code>\uff0c\u547d\u4ee4\u884c\u7684 pix_fmt \u6700\u540e\u89e3\u6790\u7ed9\u7f16\u7801\u5668\u7684 pix_fmt \u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>google_ads_content<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u8fd9\u91cc\uff0c\u8fd8\u6709\u4e00\u4e2a\u91cd\u70b9\uff0c\u5982\u679c\u89e3\u7801\u5668\u8f93\u51fa\u7684 pix_fmt \u8ddf video_enc-&gt;pix_fmt \u4e0d\u4e00\u81f4\uff0c\u5c31\u4f1a\u521b\u5efa filter\uff0c\u8fdb\u884c\u683c\u5f0f\u8f6c\u6362\u3002\u628a\u50cf\u7d20\u683c\u5f0f\u8f6c\u6362\u597d\u4e4b\u540e\u518d\u4e22\u7ed9\u7f16\u7801\u5668\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>configure_output_video_filter() \u51fd\u6570\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >if ((pix_fmts = choose_pix_fmts(ofilter))) {\n        AVFilterContext *filter;\n        snprintf(name, sizeof(name), &quot;format_out_%d_%d&quot;,\n                 ost-&gt;file_index, ost-&gt;index);\n        ret = avfilter_graph_create_filter(&amp;filter,\n                                           avfilter_get_by_name(&quot;format&quot;),\n                                           &quot;format&quot;, pix_fmts, NULL, fg-&gt;graph);\n        av_freep(&amp;pix_fmts);\n        if (ret &lt; 0)\n            return ret;\n        if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) &lt; 0)\n            return ret;\n\u200b\n        last_filter = filter;\n        pad_idx     = 0;\n    }<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230 \u50cf\u7d20\u683c\u5f0f\u8f6c\u6362\uff0cffmpeg \u4e5f\u5c01\u88c5\u4e86 \u4e00\u4e2a format filter\u6765\u5b9e\u73b0\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u7248\u6743\u6240\u5c5e\uff1a\u77e5\u8bc6\u661f\u7403\uff1a\u5f26\u5916\u4e4b\u97f3\uff0cQQ\uff1a2338195090\u3002 \u7531\u4e8e\u7b14\u8005\u7684\u6c34\u5e73\u6709\u9650\uff0c \u52a0\u4e4b\u7f16\u5199\u7684\u540c\u65f6\u8fd8\u8981\u53c2\u4e0e\u5f00\u53d1\u5de5\u4f5c\uff0c\u6587\u4e2d\u96be\u514d\u4f1a\u51fa\u73b0\u4e00\u4e9b\u9519\u8bef\u6216\u8005\u4e0d\u51c6\u786e\u7684\u5730\u65b9\uff0c\u6073\u8bf7\u8bfb\u8005\u6279\u8bc4\u6307\u6b63\u3002\u5982\u679c\u8bfb\u8005\u6709\u4efb\u4f55\u5b9d\u8d35\u610f\u89c1\uff0c\u53ef\u4ee5\u52a0\u6211\u5fae\u4fe1 Loken1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u7cfb\u5217 \u4ee5 ffmpeg4.2 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