[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-09-04。"],[],[],null,["# Cropping a video\n\nThis page explains how to programmatically remove unwanted outer areas from an\ninput video. For information on how to trim the timeline of input videos, see\n[Stream mappings](/transcoder/docs/concepts/stream-mappings).\n\nUse the\n[`crop`](/transcoder/docs/reference/rest/v1/JobConfig#preprocessingconfig)\nconfiguration field to specify the number of pixels to remove from each side of\nthe input video. You can add this configuration to a\n[job template](/transcoder/docs/how-to/job-templates) or include it in an\n[ad-hoc job configuration](/transcoder/docs/how-to/jobs#create_jobs_ad_hoc).\n\nThe following REST/JSON configuration removes 10 pixels from the top of an input\nvideo. The input video is then scaled to meet the dimensions specified by the\n`widthPixels` and `heightPixels` fields in the specified codec for the\n[`videoStream`](/transcoder/docs/reference/rest/v1/JobConfig#videostream)\nobject. The output video is then generated from this scaled intermediate video. \n\n \"inputs\": [\n {\n \"key\": \"input0\",\n \"uri\": \"gs://\u003cvar translate=\"no\"\u003eSTORAGE_BUCKET_NAME\u003c/var\u003e/\u003cvar translate=\"no\"\u003eSTORAGE_INPUT_VIDEO\u003c/var\u003e\",\n \"preprocessingConfig\": {\n \"crop\": {\n \"topPixels\": 10\n }\n }\n }\n ],"]]