{"id":503,"date":"2025-06-18T16:58:58","date_gmt":"2025-06-18T08:58:58","guid":{"rendered":"https:\/\/trantor.ink\/?p=503"},"modified":"2025-06-18T16:58:58","modified_gmt":"2025-06-18T08:58:58","slug":"ffmpeg-%e8%a7%86%e9%a2%91%e5%8f%82%e6%95%b0-sar-par-dar-%e5%9f%ba%e7%a1%80%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"https:\/\/trantor.ink\/?p=503","title":{"rendered":"FFmpeg \u89c6\u9891\u53c2\u6570 SAR, PAR, DAR \u57fa\u7840\u6982\u5ff5"},"content":{"rendered":"\n

FFmpeg\u4e2d\u7684\u89c6\u9891\u53c2\u6570 SAR,PAR,DAR\uff0c \u4ece\u5b8f\u89c2\u4e0a\u63cf\u8ff0\u4e00\u4e2a\u89c6\u9891\u8f6e\u5982\u4f55\u88ab\u64ad\u653e\u5668\u6b63\u786e\u663e\u793a\u3002\u5728\u4e0d\u540c\u7684\u6587\u6863\u4e2d\uff0c\u901a\u5e38\u5bf9\u8fd9\u4e09\u4e2a\u53c2\u6570\u6709\u4e0d\u540c\u7684\u8868\u8ff0\u3002\u4f46\u662f\uff0c\u5747\u6307\u4ee3\u540c\u4e00\u4e8b\u7269\u3002\u9996\u5148\u6765\u770b\u89e3\u91ca\uff1a<\/p>\n\n\n\n

PAR – pixel aspect ratio\uff0c\u5355\u4e2a\u50cf\u7d20\u7684\u5bbd\u9ad8\u6bd4\uff0c\u5927\u591a\u6570\u60c5\u51b5\u50cf\u7d20\u5bbd\u9ad8\u6bd4\u4e3a1:1\uff0c\u4e5f\u5c31\u662f\u4e00\u4e2a\u6b63\u65b9\u5f62\u50cf\u7d20\uff0c\u5982\u679c\u4e0d\u662f1:1\uff0c \u5219\u8be5\u50cf\u7d20\u53ef\u4ee5\u7406\u89e3\u4e3a\u957f\u65b9\u5f62\u50cf\u7d20\u3002\u5e38\u7528\u7684PAR\u6bd4\u7387\u6709(1:1\uff0c10:11, 40:33, 16:11, 12:11 )\uff1b<\/p>\n\n\n\n

DAR – display aspect ratio\uff0c\u663e\u793a\u5bbd\u9ad8\u6bd4\u3002\u5373\u6700\u7ec8\u64ad\u653e\u51fa\u6765\u7684\u753b\u9762\u7684\u5bbd\u4e0e\u9ad8\u4e4b\u6bd4\u3002\u6bd4\u5982\u5e38\u89c1\u768416:9\u548c4:3\u7b49\u3002\u7f29\u653e\u89c6\u9891\u4e5f\u8981\u6309\u8fd9\u4e2a\u6bd4\u4f8b\u6765\uff0c\u5426\u5219\u4f1a\u4f7f\u56fe\u50cf\u770b\u8d77\u6765\u88ab\u538b\u6241\u6216\u8005\u62c9\u957f\u4e86\u4f3c\u7684\uff1b<\/p>\n\n\n\n

SAR – Sample aspect ratio\uff0c\u91c7\u6837\u7eb5\u6a2a\u6bd4\uff0c \u8868\u793a\u6a2a\u5411\u7684\u50cf\u7d20\u70b9\u6570\u548c\u7eb5\u5411\u7684\u50cf\u7d20\u70b9\u6570\u7684\u6bd4\u503c\uff0c\u5373\u4e3a\u6211\u4eec\u901a\u5e38\u63d0\u5230\u7684\u5206\u8fa8\u7387\u5bbd\u9ad8\u6bd4\u3002\u5c31\u662f\u5bf9\u56fe\u50cf\u91c7\u96c6\u65f6\uff0c\u6a2a\u5411\u91c7\u96c6\u4e0e\u7eb5\u5411\u91c7\u96c6\u6784\u6210\u7684\u70b9\u9635\uff0c\u6a2a\u5411\u70b9\u6570\u4e0e\u7eb5\u5411\u70b9\u6570\u7684\u6bd4\u503c\u3002\u6bd4\u5982VGA\u56fe\u50cf640\/480 = 4:3\uff0cD-1 PAL\u56fe\u50cf720\/576 = 5:4\uff0c\u9ad8\u6e05\u89c6\u9891 \u7b49\u3002<\/p>\n\n\n\n

\u4e09\u8005\u7684\u5173\u7cfb\uff1a PAR x SAR = DAR \u6216\u8005 PAR = DAR\/SAR.<\/p>\n","protected":false},"excerpt":{"rendered":"

FFmpeg\u4e2d\u7684\u89c6\u9891\u53c2\u6570 SAR,PAR,DAR\uff0c \u4ece\u5b8f\u89c2\u4e0a\u63cf\u8ff0\u4e00\u4e2a\u89c6\u9891\u8f6e\u5982\u4f55\u88ab\u64ad\u653e\u5668\u6b63\u786e\u663e\u793a\u3002\u5728\u4e0d\u540c\u7684\u6587\u6863\u4e2d\uff0c\u901a\u5e38\u5bf9\u8fd9\u4e09\u4e2a\u53c2\u6570\u6709\u4e0d\u540c\u7684\u8868\u8ff0\u3002\u4f46\u662f\uff0c\u5747\u6307\u4ee3\u540c\u4e00\u4e8b\u7269\u3002\u9996\u5148\u6765\u770b\u89e3\u91ca\uff1a PAR – pixel aspect ratio\uff0c\u5355\u4e2a\u50cf\u7d20\u7684\u5bbd\u9ad8\u6bd4\uff0c\u5927\u591a\u6570\u60c5\u51b5\u50cf\u7d20\u5bbd\u9ad8\u6bd4\u4e3a1:1\uff0c\u4e5f\u5c31\u662f\u4e00\u4e2a\u6b63\u65b9\u5f62\u50cf\u7d20\uff0c\u5982\u679c\u4e0d\u662f1:1\uff0c \u5219\u8be5\u50cf\u7d20\u53ef\u4ee5\u7406\u89e3\u4e3a\u957f\u65b9\u5f62\u50cf\u7d20\u3002\u5e38\u7528\u7684PAR\u6bd4\u7387\u6709(1:1\uff0c10:11, 40:33, 16:11, 12:11 )\uff1b DAR – display aspect ratio\uff0c\u663e\u793a\u5bbd\u9ad8\u6bd4\u3002\u5373\u6700\u7ec8\u64ad\u653e\u51fa\u6765\u7684\u753b\u9762\u7684\u5bbd\u4e0e\u9ad8\u4e4b\u6bd4\u3002\u6bd4\u5982\u5e38\u89c1\u768416:9\u548c4:3\u7b49\u3002\u7f29\u653e\u89c6\u9891\u4e5f\u8981\u6309\u8fd9\u4e2a\u6bd4\u4f8b\u6765\uff0c\u5426\u5219\u4f1a\u4f7f\u56fe\u50cf\u770b\u8d77\u6765\u88ab\u538b\u6241\u6216\u8005\u62c9\u957f\u4e86\u4f3c\u7684\uff1b SAR – Sample aspect ratio\uff0c\u91c7\u6837\u7eb5\u6a2a\u6bd4\uff0c \u8868\u793a\u6a2a\u5411\u7684\u50cf\u7d20\u70b9\u6570\u548c\u7eb5\u5411\u7684\u50cf\u7d20\u70b9\u6570\u7684\u6bd4\u503c\uff0c\u5373\u4e3a\u6211\u4eec\u901a\u5e38\u63d0\u5230\u7684\u5206\u8fa8\u7387\u5bbd\u9ad8\u6bd4\u3002\u5c31\u662f\u5bf9\u56fe\u50cf\u91c7\u96c6\u65f6\uff0c\u6a2a\u5411\u91c7\u96c6\u4e0e\u7eb5\u5411\u91c7\u96c6\u6784\u6210\u7684\u70b9\u9635\uff0c\u6a2a\u5411\u70b9\u6570\u4e0e\u7eb5\u5411\u70b9\u6570\u7684\u6bd4\u503c\u3002\u6bd4\u5982VGA\u56fe\u50cf640\/480 = 4:3\uff0cD-1 PAL\u56fe\u50cf720\/576 = 5:4\uff0c\u9ad8\u6e05\u89c6\u9891 \u7b49\u3002 \u4e09\u8005\u7684\u5173\u7cfb\uff1a PAR x SAR = DAR \u6216\u8005 PAR = DAR\/SAR.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[62],"class_list":["post-503","post","type-post","status-publish","format-standard","hentry","category-dev","tag-ffmpeg"],"_links":{"self":[{"href":"https:\/\/trantor.ink\/index.php?rest_route=\/wp\/v2\/posts\/503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/trantor.ink\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/trantor.ink\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/trantor.ink\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/trantor.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=503"}],"version-history":[{"count":1,"href":"https:\/\/trantor.ink\/index.php?rest_route=\/wp\/v2\/posts\/503\/revisions"}],"predecessor-version":[{"id":504,"href":"https:\/\/trantor.ink\/index.php?rest_route=\/wp\/v2\/posts\/503\/revisions\/504"}],"wp:attachment":[{"href":"https:\/\/trantor.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/trantor.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/trantor.ink\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}